Sto incontrando problemi perché il mio open_files_limit
for mysql è solo 1024
.
Centos 7, MySQL Community Server 5.6.22-log
In realtà è un vps dedicato a mysql per un server WHM (mysql remoto), ma questo dovrebbe essere il punto.
File di configurazione
my.cnf
:
[mysqld]
open_files_limit = 100000
open-files-limit = 100000 #I've read that the dashes are required on older versions, but I threw it in anyway.
innodb_buffer_pool_size = 600M
...
# and the same for mysqld_safe
[mysqld_safe]
open_files_limit = 100000
open-files-limit = 100000
...
/etc/security/limits.conf
:
* hard nofile 100000
* soft nofile 100000
Output dei comandi
Il mio sistema operativo open_files_limit per root:
[root@mack ~]# ulimit -Hn -Sn
open files (-n) 100000
open files (-n) 100000
E poi come utente mysql:
[root@mack ~]# su mysql
bash-4.2$ ulimit -Hn -Sn
open files (-n) 100000
open files (-n) 100000
Stato di MySQL:
[root@mack ~]# service mysql status
Redirecting to /bin/systemctl status mysql.service
mysqld.service - MySQL Community Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled)
Active: active (running) since Wed 2014-12-24 10:41:09 EST; 40min ago
Process: 2982 ExecStartPost=/usr/bin/mysql-systemd-start post (code=exited, status=0/SUCCESS)
Process: 2970 ExecStartPre=/usr/bin/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
Main PID: 2981 (mysqld_safe)
CGroup: /system.slice/mysqld.service
ââ2981 /bin/sh /usr/bin/mysqld_safe
ââ3268 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mysqld.log --open-files-limit=100000 --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/my...
Dec 24 10:41:08 mack systemd[1]: Starting MySQL Community Server...
Dec 24 10:41:09 mack mysqld_safe[2981]: 141224 10:41:09 mysqld_safe Logging to '/var/log/mysqld.log'.
Dec 24 10:41:09 mack mysqld_safe[2981]: 141224 10:41:09 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
Dec 24 10:41:09 mack systemd[1]: Started MySQL Community Server.
Ho riavviato mysql, arrestato, verificato lo stato per assicurarmi che si sia arrestato, quindi avviato e riavviato l'intero sistema.
Prova che my.cnf
funziona:
mysql> show global variables like '%buffer_pool_size%';
+-------------------------+-----------+
| Variable_name | Value |
+-------------------------+-----------+
| innodb_buffer_pool_size | 629145600 |
+-------------------------+-----------+
1 row in set (0.00 sec)
Ora ecco dove la mia pressione sanguigna sale:
mysql> show global variables like 'open%';
+------------------+-------+
| Variable_name | Value |
+------------------+-------+
| open_files_limit | 1024 |
+------------------+-------+
1 row in set (0.00 sec)
Cosa mi sto perdendo? C'è un altro my.cnf che sovrascrive il mio valore?
[root@mack ~]# find / -name "*.cnf"
/usr/share/mysql/my-default.cnf
/usr/share/doc/mysql-community-server-5.6.22/my-default.cnf
/var/lib/mysql/auto.cnf
/etc/my.cnf
/etc/pki/tls/openssl.cnf
Ho esaminato tutti questi aspetti e non si fa menzione di open_files_limit. Per diamine, ho grep
cercato queste impostazioni:
[root@mack ~]# grep -r "open_files_limit" /etc
/etc/my.cnf:open_files_limit = 100000
/etc/my.cnf:open_files_limit = 100000
[root@mack ~]# grep -r "open_files_limit" /var
[root@mack ~]# grep -r "open_files_limit" /usr
/usr/share/vim/vim74/syntax/ora.vim:syn keyword oraKeywordUnd _number_cached_attributes _offline_rollback_segments _open_files_limit
Binary file /usr/sbin/mysqld matches
Binary file /usr/sbin/mysqld-debug matches
Binary file /usr/bin/mysqlbinlog matches
/usr/bin/mysqld_safe: --open_files_limit=*) open_files="$val" ;;
Ma no, non lo influenzano.
2014-12-24 10:41:09 3268 [Warning] Buffered warning: Could not increase number of max_open_files to more than 1024 (request: 100000)
. Questo deve significare che MySQL sta provando ad aumentare il suo limite.