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a35cde8cd8
Quoting MDEV reporter Daniel Lewart:
Starting MariaDB with default configuration causes the following problems:
"[Warning] Could not increase number of max_open_files to more than 16384 (request: 32186)"
silently reduces table_open_cache_instances from 8 (default) to 4
Default Server System Variables:
extra_max_connections = 1
max_connections = 151
table_open_cache = 2000
table_open_cache_instances = 8
thread_pool_size = 4
LimitNOFILE=16834 is in the following files:
support-files/mariadb.service.in
support-files/mariadb@.service.in
Looking at sql/mysqld.cc lines 3837-3917:
wanted_files= (extra_files + max_connections + extra_max_connections +
tc_size * 2 * tc_instances);
wanted_files+= threadpool_size;
Plugging in the default values:
wanted_files = (30 + 151 + 1 + 2000 * 2 * 8 + 4) = 32186
However, systemd configuration has LimitNOFILE = 16384, which is far smaller.
I suggest increasing LimitNOFILE to 32768.
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| .. | ||
| dtrace | ||
| MacOSX | ||
| policy | ||
| rpm | ||
| binary-configure.sh | ||
| build-tags | ||
| ccfilter | ||
| CMakeLists.txt | ||
| compiler_warnings.supp | ||
| db.opt | ||
| magic | ||
| mariadb.pc.in | ||
| mariadb.service.in | ||
| mariadb@.service.in | ||
| my-huge.cnf.sh | ||
| my-innodb-heavy-4G.cnf.sh | ||
| my-large.cnf.sh | ||
| my-medium.cnf.sh | ||
| my-small.cnf.sh | ||
| mysql-log-rotate.sh | ||
| mysql-multi.server.sh | ||
| mysql.m4 | ||
| mysql.server-sys5.sh | ||
| mysql.server.sh | ||
| mysqld_multi.server.sh | ||
| sysusers.conf.in | ||
| tmpfiles.conf.in | ||
| use_galera_new_cluster.conf | ||
| wsrep.cnf.sh | ||
| wsrep_notify.sh | ||