Directory /tmp is now on tmpfs, which can cause problems with limitted space or replication. It's documented here: http://dev.mysql.com/doc/refman/5.5/en/server-options.html#option_mysqld_tmpdir "If the MySQL server is acting as a replication slave, you should not set --tmpdir to point to a directory on a memory-based file system or to a directory that is cleared when the server host restarts." RHBZ#962087 Upstream bug report: https://mariadb.atlassian.net/browse/MDEV-4165 MySQL bug report: http://bugs.mysql.com/bug.php?id=68338 diff -up mysql-5.6.14/CMakeLists.txt.tmpdir mysql-5.6.14/CMakeLists.txt --- mysql-5.6.14/CMakeLists.txt.tmpdir 2013-09-10 09:38:25.000000000 +0200 +++ mysql-5.6.14/CMakeLists.txt 2013-10-09 14:49:14.115887439 +0200 @@ -309,6 +309,10 @@ IF(SYSCONFDIR) SET(DEFAULT_SYSCONFDIR "${SYSCONFDIR}") ENDIF() +IF(TMPDIR) + SET(DEFAULT_TMPDIR "${TMPDIR}") +ENDIF() + # Run platform tests INCLUDE(configure.cmake) diff -up mysql-5.6.14/config.h.cmake.tmpdir mysql-5.6.14/config.h.cmake --- mysql-5.6.14/config.h.cmake.tmpdir 2013-09-10 09:38:25.000000000 +0200 +++ mysql-5.6.14/config.h.cmake 2013-10-09 14:49:14.115887439 +0200 @@ -636,6 +636,7 @@ #cmakedefine DEFAULT_CHARSET_HOME "@DEFAULT_CHARSET_HOME@" #cmakedefine PLUGINDIR "@PLUGINDIR@" #cmakedefine DEFAULT_SYSCONFDIR "@DEFAULT_SYSCONFDIR@" +#cmakedefine DEFAULT_TMPDIR "@DEFAULT_TMPDIR@" #cmakedefine SO_EXT "@CMAKE_SHARED_MODULE_SUFFIX@" diff -up mysql-5.6.14/include/my_global.h.tmpdir mysql-5.6.14/include/my_global.h --- mysql-5.6.14/include/my_global.h.tmpdir 2013-09-10 09:38:25.000000000 +0200 +++ mysql-5.6.14/include/my_global.h 2013-10-09 14:49:14.116887439 +0200 @@ -1219,3 +1219,10 @@ typedef struct #endif #endif // MY_GLOBAL_INCLUDED +/* + Define default tmpdir if not already set. +*/ +#if !defined(DEFAULT_TMPDIR) +#define DEFAULT_TMPDIR P_tmpdir +#endif + diff -up mysql-5.6.14/libmysqld/lib_sql.cc.tmpdir mysql-5.6.14/libmysqld/lib_sql.cc --- mysql-5.6.14/libmysqld/lib_sql.cc.tmpdir 2013-09-10 09:38:26.000000000 +0200 +++ mysql-5.6.14/libmysqld/lib_sql.cc 2013-10-09 14:49:14.116887439 +0200 @@ -587,7 +587,7 @@ int init_embedded_server(int argc, char opt_mysql_tmpdir=getenv("TMP"); #endif if (!opt_mysql_tmpdir || !opt_mysql_tmpdir[0]) - opt_mysql_tmpdir=(char*) P_tmpdir; /* purecov: inspected */ + opt_mysql_tmpdir=(char*) DEFAULT_TMPDIR; /* purecov: inspected */ init_ssl(); umask(((~my_umask) & 0666)); diff -up mysql-5.6.14/mysys/mf_tempdir.c.tmpdir mysql-5.6.14/mysys/mf_tempdir.c --- mysql-5.6.14/mysys/mf_tempdir.c.tmpdir 2013-09-10 09:38:25.000000000 +0200 +++ mysql-5.6.14/mysys/mf_tempdir.c 2013-10-09 14:49:14.116887439 +0200 @@ -43,7 +43,7 @@ my_bool init_tmpdir(MY_TMPDIR *tmpdir, c pathlist=getenv("TMP"); #endif if (!pathlist || !pathlist[0]) - pathlist=(char*) P_tmpdir; + pathlist=(char*) DEFAULT_TMPDIR; } do { diff -up mysql-5.6.14/mysys/mf_tempfile.c.tmpdir mysql-5.6.14/mysys/mf_tempfile.c --- mysql-5.6.14/mysys/mf_tempfile.c.tmpdir 2013-09-10 09:38:25.000000000 +0200 +++ mysql-5.6.14/mysys/mf_tempfile.c 2013-10-09 14:49:14.117887440 +0200 @@ -111,7 +111,7 @@ File create_temp_file(char *to, const ch sizeof(prefix_buff)-7),"XXXXXX") - prefix_buff); if (!dir && ! (dir =getenv("TMPDIR"))) - dir=P_tmpdir; + dir=DEFAULT_TMPDIR; if (strlen(dir)+ pfx_len > FN_REFLEN-2) { errno=my_errno= ENAMETOOLONG;