I run a site with a few million MySQL requests a day, but I've run into a strange problem which I'm trying to slove.
The server is running Apache 2.0.47, mod_perl2-1.99r09, DBI 1.38 and DBD-mysql 2.1026 on a FreeBSD 4.8 machine. About once or twice a day, I get a bunch of slow queries that doesn't look like they should be slow. And most of the day they aren't. Examples: # Query_time: 51 Lock_time: 0 Rows_sent: 0 Rows_examined: 0 update innodb_tbl set col1=col1-1000, col2=col2-1000, col3=col3-1000 where primary_key=50; # Query_time: 46 Lock_time: 0 Rows_sent: 0 Rows_examined: 0 update innodb_tbl set col4=1 where primary_key=50; # Query_time: 11 Lock_time: 0 Rows_sent: 1 Rows_examined: 0 select * from innodb_tbl where primary_key=1 for update; ..... The list goes on and on... All of my slow queries are really fast at all other times. Fast as in instant. This doesn't look like a load issue, and I'm having problems figuring out what is causing this. Any ideas where to start digging and what I should try doing? I really need this solved. Regards, Erlend Simonsen
