I am running ubuntu server. When I tried to login to mysql(which was running),I got the following error
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
But mysqld.sock file doesn't exist inside
ps aux | grep mysql command,I realized that mysql server was not running.
I then tried to restart mysql server using
service mysql start service mysql restart /etc/init.d/mysql start
But,the start process failed in all 3 cases.
/var/log/mysql/mysql.err files are empty.
/var/log/error.log shows following information:
140425 12:49:05 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 140425 12:49:05 [Note] Plugin 'FEDERATED' is disabled. 140425 12:49:05 InnoDB: The InnoDB memory heap is disabled 140425 12:49:05 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140425 12:49:05 InnoDB: Compressed tables use zlib 1.2.8 140425 12:49:05 InnoDB: Using Linux native AIO 140425 12:49:05 InnoDB: Initializing buffer pool, size = 3.0G 140425 12:49:05 InnoDB: Completed initialization of buffer pool InnoDB: Error: log file ./ib_logfile0 is of different size 0 5242880 bytes InnoDB: than specified in the .cnf file 0 26214400 bytes! 140425 12:49:05 [ERROR] Plugin 'InnoDB' init function returned error. 140425 12:49:05 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 140425 12:49:05 [ERROR] /usr/sbin/mysqld: unknown variable 'record_buffer=64M' 140425 12:49:05 [ERROR] Aborting 140425 12:49:05 [Note] /usr/sbin/mysqld: Shutdown complete