737 lines
18 KiB
Groff
737 lines
18 KiB
Groff
.\" Man page generated from reStructuredText.
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.TH "MONGOSTAT" "1" "January 30, 2015" "3.0" "mongodb-manual"
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.SH NAME
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mongostat \- MongoDB Use Statistics
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.
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. RE
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..
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.SH SYNOPSIS
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.sp
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The \fBmongostat\fP utility provides a quick overview of the
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status of a currently running \fBmongod\fP
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or \fBmongos\fP
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instance. \fBmongostat\fP is functionally similar to the
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UNIX/Linux file system utility \fBvmstat\fP, but provides data regarding
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\fBmongod\fP and \fBmongos\fP instances.
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.sp
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\fBSEE ALSO:\fP
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.INDENT 0.0
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.INDENT 3.5
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For more information about monitoring MongoDB, see
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http://docs.mongodb.org/manual/administration/monitoring\&.
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.sp
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For more background on various other MongoDB status outputs see:
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.INDENT 0.0
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.IP \(bu 2
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http://docs.mongodb.org/manual/reference/command/serverStatus
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.IP \(bu 2
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http://docs.mongodb.org/manual/reference/command/replSetGetStatus
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.IP \(bu 2
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http://docs.mongodb.org/manual/reference/command/dbStats
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.IP \(bu 2
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http://docs.mongodb.org/manual/reference/command/collStats
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.UNINDENT
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.sp
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For an additional utility that provides MongoDB metrics see
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\fBmongotop\fP\&.
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.UNINDENT
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.UNINDENT
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.SH ACCESS CONTROL REQUIREMENTS
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.sp
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In order to connect to a \fBmongod\fP that enforces authorization
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with the \fI\-\-auth\fP option, specify the
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\fI\-\-username\fP and \fI\-\-password\fP options, and the user specified must have the
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\fBserverStatus\fP privilege action on the cluster resources.
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.sp
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The built\-in role \fBclusterMonitor\fP provides this privilege as
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well as other privileges. To create a role with just the privilege to
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run \fBmongostat\fP, see \fIcreate\-role\-for\-mongostat\fP\&.
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.SH OPTIONS
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.INDENT 0.0
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.TP
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.B mongostat
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.UNINDENT
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.INDENT 0.0
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.TP
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.B mongostat
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-help
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Returns information on the options and use of \fBmongostat\fP\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-verbose, \-v
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Increases the amount of internal reporting returned on standard output
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or in log files. Increase the verbosity with the \fB\-v\fP form by
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including the option multiple times, (e.g. \fB\-vvvvv\fP\&.)
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-version
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Returns the \fBmongostat\fP release number.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-host <hostname><:port>, \-h <hostname><:port>
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\fIDefault\fP: localhost:27017
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.sp
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Specifies a resolvable hostname for the \fBmongod\fP to which to
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connect. By default, the \fBmongostat\fP attempts to connect to a MongoDB
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instance running on the localhost on port number \fB27017\fP\&.
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.sp
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To connect to a replica set, specify the
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\fBreplSetName\fP and a seed list of set members, as in
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the following:
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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<replSetName>/<hostname1><:port>,<hostname2><:port>,<...>
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.sp
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You can always connect directly to a single MongoDB instance by
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specifying the host and port number directly.
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.sp
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Changed in version 3.0.0: If you use IPv6 and use the \fB<address>:<port>\fP format, you must
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enclose the portion of an address and port combination in
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brackets (e.g. \fB[<address>]\fP).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-port <port>
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\fIDefault\fP: 27017
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.sp
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Specifies the TCP port on which the MongoDB instance listens for
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client connections.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-ipv6
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Enables IPv6 support and allows the \fBmongostat\fP to connect to the
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MongoDB instance using an IPv6 network. All MongoDB programs and
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processes disable IPv6 support by default.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-ssl
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New in version 2.6.
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.sp
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Enables connection to a \fBmongod\fP or \fBmongos\fP that has
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SSL support enabled.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslCAFile <filename>
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New in version 2.6.
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.sp
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Specifies the \fB\&.pem\fP file that contains the root certificate chain
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from the Certificate Authority. Specify the file name of the
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\fB\&.pem\fP file using relative or absolute paths.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.sp
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\fBWARNING:\fP
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.INDENT 7.0
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.INDENT 3.5
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If the \fBmongo\fP shell or any other tool that connects to
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\fBmongos\fP or \fBmongod\fP is run without
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\fI\-\-sslCAFile\fP, it will not attempt to validate
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server certificates. This results in vulnerability to expired
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\fBmongod\fP and \fBmongos\fP certificates as well as to foreign
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processes posing as valid \fBmongod\fP or \fBmongos\fP
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instances. Ensure that you \fIalways\fP specify the CA file against which
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server certificates should be validated in cases where intrusion is a
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possibility.
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslPEMKeyFile <filename>
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New in version 2.6.
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.sp
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Specifies the \fB\&.pem\fP file that contains both the SSL certificate
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and key. Specify the file name of the \fB\&.pem\fP file using relative
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or absolute paths.
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.sp
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This option is required when using the \fI\-\-ssl\fP option to connect
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to a \fBmongod\fP or \fBmongos\fP that has
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\fBCAFile\fP enabled \fIwithout\fP
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\fBallowConnectionsWithoutCertificates\fP\&.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslPEMKeyPassword <value>
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New in version 2.6.
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.sp
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Specifies the password to de\-crypt the certificate\-key file (i.e.
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\fI\-\-sslPEMKeyFile\fP). Use the \fI\-\-sslPEMKeyPassword\fP option only if the
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certificate\-key file is encrypted. In all cases, the \fBmongostat\fP will
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redact the password from all logging and reporting output.
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.sp
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If the private key in the PEM file is encrypted and you do not specify
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the \fI\-\-sslPEMKeyPassword\fP option, the \fBmongostat\fP will prompt for a passphrase. See
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\fIssl\-certificate\-password\fP\&.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslCRLFile <filename>
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New in version 2.6.
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.sp
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Specifies the \fB\&.pem\fP file that contains the Certificate Revocation
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List. Specify the file name of the \fB\&.pem\fP file using relative or
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absolute paths.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslAllowInvalidCertificates
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New in version 2.6.
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.sp
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Bypasses the validation checks for server certificates and allows
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the use of invalid certificates. When using the
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\fBallowInvalidCertificates\fP setting, MongoDB logs as a
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warning the use of the invalid certificate.
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.sp
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The default distribution of MongoDB does not contain support for SSL.
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For more information on MongoDB and SSL, see http://docs.mongodb.org/manual/tutorial/configure\-ssl\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslAllowInvalidHostnames
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New in version 3.0.
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.sp
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Disables the validation of the hostnames in SSL certificates. Allows
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\fBmongostat\fP to connect to MongoDB instances if the hostname their
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certificates do not match the specified hostname.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-sslFIPSMode
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New in version 2.6.
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.sp
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Directs the \fBmongostat\fP to use the FIPS mode of the installed OpenSSL
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library. Your system must have a FIPS compliant OpenSSL library to use
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the \fI\-\-sslFIPSMode\fP option.
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.sp
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\fBNOTE:\fP
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.INDENT 7.0
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.INDENT 3.5
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FIPS Compatible SSL is
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available only in \fI\%MongoDB Enterprise\fP\&. See
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http://docs.mongodb.org/manual/tutorial/configure\-fips for more information.
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-username <username>, \-u <username>
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Specifies a username with which to authenticate to a MongoDB database
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that uses authentication. Use in conjunction with the \fB\-\-password\fP and
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\fB\-\-authenticationDatabase\fP options.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-password <password>, \-p <password>
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Specifies a password with which to authenticate to a MongoDB database
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that uses authentication. Use in conjunction with the \fB\-\-username\fP and
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\fB\-\-authenticationDatabase\fP options.
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.sp
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If you do not specify an argument for \fI\-\-password\fP, \fBmongostat\fP will
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prompt interactively for a password on the console.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-authenticationDatabase <dbname>
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New in version 2.4.
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.sp
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Specifies the database that holds the user\(aqs credentials.
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.sp
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\fI\-\-authenticationDatabase\fP is required for \fBmongod\fP
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and \fBmongos\fP instances that use \fIauthentication\fP\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-authenticationMechanism <name>
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\fIDefault\fP: MONGODB\-CR
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.sp
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New in version 2.4.
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.sp
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Changed in version 2.6: Added support for the \fBPLAIN\fP and \fBMONGODB\-X509\fP authentication
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mechanisms.
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.sp
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Specifies the authentication mechanism the \fBmongostat\fP instance uses to
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authenticate to the \fBmongod\fP or \fBmongos\fP\&.
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.TS
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center;
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|l|l|.
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_
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T{
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Value
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T} T{
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Description
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T}
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_
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T{
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MONGODB\-CR
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T} T{
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MongoDB challenge/response authentication.
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T}
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_
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T{
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MONGODB\-X509
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T} T{
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MongoDB SSL certificate authentication.
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T}
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_
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T{
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PLAIN
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T} T{
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External authentication using LDAP. You can also use \fBPLAIN\fP
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for authenticating in\-database users. \fBPLAIN\fP transmits
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passwords in plain text. This mechanism is available only in
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\fI\%MongoDB Enterprise\fP\&.
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T}
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_
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T{
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GSSAPI
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T} T{
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External authentication using Kerberos. This mechanism is
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available only in \fI\%MongoDB Enterprise\fP\&.
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T}
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_
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.TE
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-gssapiServiceName
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New in version 2.6.
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.sp
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Specify the name of the service using \fBGSSAPI/Kerberos\fP\&. Only required if the service does not use the
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default name of \fBmongodb\fP\&.
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.sp
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This option is available only in MongoDB Enterprise.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-gssapiHostName
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New in version 2.6.
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.sp
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Specify the hostname of a service using \fBGSSAPI/Kerberos\fP\&. \fIOnly\fP required if the hostname of a machine does
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not match the hostname resolved by DNS.
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.sp
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This option is available only in MongoDB Enterprise.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-noheaders
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Disables the output of column or field names.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-rowcount <number>, \-n <number>
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Controls the number of rows to output. Use in conjunction with
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the \fBsleeptime\fP argument to control the duration of a
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\fBmongostat\fP operation.
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.sp
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Unless \fI\-\-rowcount\fP is specified, \fBmongostat\fP
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will return an infinite number of rows (e.g. value of \fB0\fP\&.)
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-http
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Configures \fBmongostat\fP to collect data using the HTTP interface
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rather than a raw database connection.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-discover
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Discovers and reports on statistics from all members of a \fIreplica
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set\fP or \fIsharded cluster\fP\&. When connected to any member of a
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replica set, \fI\%\-\-discover\fP all non\-\fIhidden members\fP of the replica set. When connected to a \fBmongos\fP,
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\fBmongostat\fP will return data from all \fIshards\fP in
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the cluster. If a replica set provides a shard in the sharded cluster,
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\fBmongostat\fP will report on non\-hidden members of that replica
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set.
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.sp
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The \fImongostat \-\-host\fP option is not required but
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potentially useful in this case.
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.sp
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Changed in version 2.6: When running with \fI\%\-\-discover\fP, \fBmongostat\fP now
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respects :option:\-\-rowcount\(ga.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-all
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Configures \fBmongostat\fP to return all optional \fI\%fields\fP\&.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-json
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New in version 3.0.0.
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.sp
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Returns output for \fBmongostat\fP in \fIJSON\fP format.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B <sleeptime>
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The final argument is the length of time, in seconds, that
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\fBmongostat\fP waits in between calls. By default \fBmongostat\fP
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returns one call every second.
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.sp
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\fBmongostat\fP returns values that reflect the operations
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over a 1 second period. For values of \fB<sleeptime>\fP greater
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than 1, \fBmongostat\fP averages data to reflect average
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operations per second.
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.UNINDENT
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.SH FIELDS
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.sp
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\fBmongostat\fP returns values that reflect the operations over a
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1 second period. When \fBmongostat <sleeptime>\fP has a value
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greater than 1, \fBmongostat\fP averages the statistics to reflect
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average operations per second.
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.sp
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\fBmongostat\fP outputs the following fields:
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.INDENT 0.0
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.TP
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.B inserts
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The number of objects inserted into the database per second. If
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followed by an asterisk (e.g. \fB*\fP), the datum refers to a
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replicated operation.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B query
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The number of query operations per second.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B update
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The number of update operations per second.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B delete
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The number of delete operations per second.
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.UNINDENT
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|
.INDENT 0.0
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.TP
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.B getmore
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The number of get more (i.e. cursor batch) operations per second.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B command
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|
The number of commands per second. On \fIslave\fP and
|
|
\fIsecondary\fP systems, \fBmongostat\fP presents two values
|
|
separated by a pipe character (e.g. \fB|\fP), in the form of
|
|
\fBlocal|replicated\fP commands.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B flushes
|
|
The number of \fIfsync\fP operations per second.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B mapped
|
|
The total amount of data mapped in megabytes. This is the total
|
|
data size at the time of the last \fBmongostat\fP call.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B size
|
|
The amount of virtual memory in megabytes used by the process at
|
|
the time of the last \fBmongostat\fP call.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B non\-mapped
|
|
The total amount of virtual memory excluding all mapped memory at
|
|
the time of the last \fBmongostat\fP call.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B res
|
|
The amount of resident memory in megabytes used by the process at
|
|
the time of the last \fBmongostat\fP call.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B faults
|
|
Changed in version 2.1.
|
|
|
|
.sp
|
|
The number of page faults per second.
|
|
.sp
|
|
Before version 2.1 this value was only provided for MongoDB
|
|
instances running on Linux hosts.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B locked
|
|
The percent of time in a global write lock.
|
|
.sp
|
|
Changed in version 2.2: The \fBlocked db\fP field replaces the \fBlocked %\fP field to
|
|
more appropriate data regarding the database specific locks in
|
|
version 2.2.
|
|
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B locked db
|
|
New in version 2.2.
|
|
|
|
.sp
|
|
The percent of time in the per\-database context\-specific
|
|
lock. \fBmongostat\fP will report the database that has spent
|
|
the most time since the last \fBmongostat\fP call with a write
|
|
lock.
|
|
.sp
|
|
This value represents the amount of time that the listed database
|
|
spent in a locked state \fIcombined\fP with the time that the
|
|
\fBmongod\fP spent in the global lock. Because of this, and
|
|
the sampling method, you may see some values greater than 100%.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B idx miss
|
|
The percent of index access attempts that required a page fault
|
|
to load a btree node. This is a sampled value.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B qr
|
|
The length of the queue of clients waiting to read data from the
|
|
MongoDB instance.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B qw
|
|
The length of the queue of clients waiting to write data from the
|
|
MongoDB instance.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B ar
|
|
The number of active clients performing read operations.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B aw
|
|
The number of active clients performing write operations.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B netIn
|
|
The amount of network traffic, in \fIbytes\fP, received by the MongoDB instance.
|
|
.sp
|
|
This includes traffic from \fBmongostat\fP itself.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B netOut
|
|
The amount of network traffic, in \fIbytes\fP, sent by the MongoDB instance.
|
|
.sp
|
|
This includes traffic from \fBmongostat\fP itself.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B conn
|
|
The total number of open connections.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B set
|
|
The name, if applicable, of the replica set.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B repl
|
|
The replication status of the member.
|
|
.TS
|
|
center;
|
|
|l|l|.
|
|
_
|
|
T{
|
|
\fBValue\fP
|
|
T} T{
|
|
\fBReplication Type\fP
|
|
T}
|
|
_
|
|
T{
|
|
M
|
|
T} T{
|
|
\fImaster\fP
|
|
T}
|
|
_
|
|
T{
|
|
SEC
|
|
T} T{
|
|
\fIsecondary\fP
|
|
T}
|
|
_
|
|
T{
|
|
REC
|
|
T} T{
|
|
recovering
|
|
T}
|
|
_
|
|
T{
|
|
UNK
|
|
T} T{
|
|
unknown
|
|
T}
|
|
_
|
|
T{
|
|
SLV
|
|
T} T{
|
|
\fIslave\fP
|
|
T}
|
|
_
|
|
T{
|
|
RTR
|
|
T} T{
|
|
mongos process ("router")
|
|
T}
|
|
_
|
|
.TE
|
|
.UNINDENT
|
|
.SH USAGE
|
|
.sp
|
|
In the first example, \fBmongostat\fP will return data every
|
|
second for 20 seconds. \fBmongostat\fP collects data from the
|
|
\fBmongod\fP instance running on the localhost interface on
|
|
port 27017. All of the following invocations produce identical
|
|
behavior:
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
.sp
|
|
.nf
|
|
.ft C
|
|
mongostat \-\-rowcount 20 1
|
|
mongostat \-\-rowcount 20
|
|
mongostat \-n 20 1
|
|
mongostat \-n 20
|
|
.ft P
|
|
.fi
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
In the next example, \fBmongostat\fP returns data every 5 minutes
|
|
(or 300 seconds) for as long as the program runs. \fBmongostat\fP
|
|
collects data from the \fBmongod\fP instance running on the
|
|
localhost interface on port \fB27017\fP\&. Both of the following
|
|
invocations produce identical behavior.
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
.sp
|
|
.nf
|
|
.ft C
|
|
mongostat \-\-rowcount 0 300
|
|
mongostat \-n 0 300
|
|
mongostat 300
|
|
.ft P
|
|
.fi
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
In the following example, \fBmongostat\fP returns data every 5
|
|
minutes for an hour (12 times.) \fBmongostat\fP collects data
|
|
from the \fBmongod\fP instance running on the localhost interface
|
|
on port 27017. Both of the following invocations produce identical
|
|
behavior.
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
.sp
|
|
.nf
|
|
.ft C
|
|
mongostat \-\-rowcount 12 300
|
|
mongostat \-n 12 300
|
|
.ft P
|
|
.fi
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
In many cases, using the \fI\-\-discover\fP
|
|
will help provide a more complete snapshot of the state of an entire
|
|
group of machines. If a \fBmongos\fP process connected to a
|
|
\fIsharded cluster\fP is running on port \fB27017\fP of the local
|
|
machine, you can use the following form to return statistics from all
|
|
members of the cluster:
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
.sp
|
|
.nf
|
|
.ft C
|
|
mongostat \-\-discover
|
|
.ft P
|
|
.fi
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SH AUTHOR
|
|
MongoDB Documentation Project
|
|
.SH COPYRIGHT
|
|
2011-2015
|
|
.\" Generated by docutils manpage writer.
|
|
.
|