…64914 Schema: sbtest Last_errno: 0 Killed: 0 # Query_time: 9.031233 Lock_time: 0.000086 Rows_sent: 0 … and returned up to the top level MySQL part for processing are counted the Rows_examined remains zero. … this query in a simple way because scanning all that rows are actually needed to produce group…
Post: How to Monitor MySQL with Percona's Nagios Plugins
February 22, 2012 By 11 Comments
…MySQL on the same files in the data directory, and refusing to shut down MySQL so that it is killed…-up of connections all trying to open or close tables can indicate LOCK_open contention. Replication… allocating too much memory. A runaway server process, or poorly optimized queries, can consume too…
Post: ACTIVE with Locks – Now thats a problem !
June 2, 2011 By 2 Comments
…process no 1098, OS thread id 1224980800 3 lock struct(s), heap size 368, 1 row lock(s), undo log entries 1 MySQL… ACTIVE for very long time at all but the ones having locks is really the killer. If you… if you get rouge transaction it will be killed quickly instead of stalling for potentially many …
Post: Troubleshooting MySQL Memory Usage
March 21, 2012 By 5 Comments
… are all connection buffers and so if you close connection MySQL can clean them up. Killing connections…forgot to remove (or still use for processing). Of course you will see these …509995888 + 2623331) File system 294352 (82672 + 211680) Lock system 318875832 (318747272 + 128560) Recovery system 0 (0…
Post: MySQL Backup tools used by Percona Remote DBA for MySQL
March 13, 2013 By 8 Comments
…between myisam and innodb tables. Global read lock only held until myisam tables are dumped…have a guardian process that runs during a backup. It then kills any process that causes a… backups Decompressing Percona XtraBackup for MySQL in parallel using all your resources available Downloading from s3…
Post: The perils of InnoDB with Debian and startup scripts
January 28, 2009 By 13 Comments
…user | | NULL | 6361 | user | | NULL +——+——————+—————-+————- Notice all those processes in ‘statistics’ …process no 30034, OS thread id 1159956816 starting index read, thread declared inside InnoDB 500 mysql tables in use 7, locked 0 MySQL… this case? mysql> KILL…
Post: MySQL optimizer: ANALYZE TABLE and Waiting for table flush
February 27, 2013 By 3 Comments
… we run ANALYZE TABLE: mysql> analyze table t; +——–+———+———-+———-+ | Table | Op | Msg_type | … Therefore the table will be locked until all queries that are using…killing a query could cause even more troubles. If we are dealing with a write query on InnoDB the rollback process…
Post: Why Swapping is bad for MySQL Performance ?
January 18, 2010 By 11 Comments
… extra IO slowing things down. Skewing up all Algorithms The database internals algorithms are tuned … for concurrent (multi CPU, multi client) processing. Database Locks/Latches are typically designed to be held … may prefer to see slowdown instead of MySQL being killed because of out of memory but …
Comment: MySQL Server Memory Usage
September 1, 2006 By 21 Comments
… ‘Com_kill‘, ’47′ ‘Com_load’, ’0′ ‘Com_load_master_data’, ’0′ ‘Com_load_master_table’, ’0′ ‘Com_lock_tables’, ‘… average: 0.79, 1.00, 0.95 328 processes: 326 sleeping, 2 running, 0 zombie, 0 …log/mysql innodb_log_arch_dir=/var/log/mysql innodb_table_locks=0 innodb_buffer_pool_size=1800M # USE ALL…
Post: Percona Server 5.1.59-13.0
October 16, 2011 By Leave a Comment
…Software Repositories). Based on MySQL 5.1.59, including all the bug fixes in …server in a replication environment, the process can be speed up by … simple but has high overhead from locking rows only to undo changes at…the threshold specified, it will be killed. This prevents users from blocking purge…
