Some queries use 100% CPU after restore
I'm moving a database to a new server. I'm using MySQL v5.0.16 on 'Windows. I used the MySQL Administrator to backup on the old system and restore on the new one. Everything is fine _except_ on the new server, some queries take 2-3 minutes with MySQL using 100% of the CPU. I've dropped unneeded views, done maintenance, verfied that all the indices I expect are there, etc. What's very, very strange is that it seems that the long queries are for old records and records created since the move are OK. I realize this is a vague request but I've been poking at this for a long time without getting any good clues or making any real headway. Any kind of brainstorming on things to check would be very welcome. Thanks. Chris -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Some queries use 100% CPU after restore
Have you tried Repair table or if InnoDB ALTER TABLE ENGINE=InnoDB; Sometimes I've noticed after a restore or after adding lots of rows performance is slow. REPAIR or the ALTER TABLE fixes it. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, March 17, 2006 2:37 PM To: mysql@lists.mysql.com Subject: Some queries use 100% CPU after restore Importance: High I'm moving a database to a new server. I'm using MySQL v5.0.16 on 'Windows. I used the MySQL Administrator to backup on the old system and restore on the new one. Everything is fine _except_ on the new server, some queries take 2-3 minutes with MySQL using 100% of the CPU. I've dropped unneeded views, done maintenance, verfied that all the indices I expect are there, etc. What's very, very strange is that it seems that the long queries are for old records and records created since the move are OK. I realize this is a vague request but I've been poking at this for a long time without getting any good clues or making any real headway. Any kind of brainstorming on things to check would be very welcome. Thanks. Chris -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: RE: Some queries use 100% CPU after restore
Have you tried Repair table or if InnoDB ALTER TABLE ENGINE=InnoDB; Sometimes I've noticed after a restore or after adding lots of rows performance is slow. REPAIR or the ALTER TABLE fixes it. I'll try that. Thanks. What's curious is that I've got one backup I can restore and have fine performance and another, later backup that I can restore and get crappy performance. I can switch back and forth all day long with quite consistent results. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Some queries use 100% CPU after restore
[EMAIL PROTECTED] wrote: I'm moving a database to a new server. I'm using MySQL v5.0.16 on 'Windows. I used the MySQL Administrator to backup on the old system and restore on the new one. Everything is fine _except_ on the new server, some queries take 2-3 minutes with MySQL using 100% of the CPU. I've dropped unneeded views, done maintenance, verfied that all the indices I expect are there, etc. What's very, very strange is that it seems that the long queries are for old records and records created since the move are OK. I realize this is a vague request but I've been poking at this for a long time without getting any good clues or making any real headway. Any kind of brainstorming on things to check would be very welcome. Thanks. Chris Analyze tables. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
