slow query log will also have sql's which are not using indexes(doing full table scan). May be those queries with "ZERO SECOND" run on small table without using indexes.
regards anandkl On Tue, Feb 23, 2010 at 2:02 PM, Machiel Richards <machi...@rdc.co.za>wrote: > Hi All > > > > I found my problem and this was kind of a blonde moment for > me... > > > > When configuring the log_slow_queries parameter, it was > configured as follows: log_slow_queries=1 > > > > This the file being created is called 1 and the 1 does not > mean it is enabled. > > > > I have fixed this now but need to wait for a gap to reboot > again to have it set properly. (have to live with the filename 1 for the > time being.) > > > > I did however find something interesting though, while > looking at the queries being logged. > > > > The slow_query_time is set to 2 (2 seconds i am assuming) > however all the queries being logged states that it ran for 0 seconds. > > > > I am busy doing explain plans on some of them now but not > really sure what to look for yet (Rather new to MySQL and hope google will > have some answers J ) > > > > > > Thank you > > > > > > > > > > From: John Daisley [mailto:mg_s...@hotmail.com] > Sent: 23 February 2010 10:24 AM > To: machi...@rdc.co.za; mysql@lists.mysql.com > Subject: RE: slow queries not being logged > > > > > > > From: machi...@rdc.co.za > > To: mysql@lists.mysql.com > > Subject: slow queries not being logged > > Date: Tue, 23 Feb 2010 09:59:13 +0200 > > > > Good day all > > > > > > > > I hope you can assist me with this one... > > > > > > > > We have a client where the slow query log was disabled. > > > > Slow query log is on the server only. If you are saying you have enabled > the slow query log and the servers query log is empty can you post your > my.cnf/my.ini file. Also make sure --long-query-time is set appropriately. > > > > > > > > We noticed that the slow query amount (when viewing global > > status) has skyrocketed during the last 2 weeks going up to over 2 > million > > (from 160 million queries). > > > > > > > > We wanted to look at these queries to see if it can be > > optimised to reduce the amount and went through the whole database > restart > > routine to enable the slow query log again (they are running version 5.0 > so > > had to restart). > > > > > > > > > > > > However, even though the slow query log is enabled, it is > > not logging the queries to the file specified. > > > > > > > > Can someone please assist in why this is not being done? I > > thought that it might be logging to a default filename but there is only > one > > slow queries log file in the directory and it is empty. > > > > > > > > Checking the global status again, it showed 29 000 slow > > queries since this morning (3 hours ago) but nothing in the logs. > > > > > > > > > > > > Your help will be appreciated. > > > > > > > > > > > > Regards > > > > > > > > _____ > > Do you want a Hotmail account? Sign-up > <http://clk.atdmt.com/UKM/go/197222280/direct/01/> now - Free > >
