By the way, the 'show tables' commands get stuck in the 'checking permissions' state.
Santiago Soares Fone: (41) 8488-0537 On Thu, Feb 10, 2011 at 4:48 PM, Santiago Soares <santiagosoa...@gmail.com>wrote: > Hello, thanks for your answers. > All of my tables are MyISAM. > I found out that the application runs a lot of 'show tables' commands. > These commands take a lot of time to run, due to the high number of tables > (~160k). > Is there anything I can do to make 'show tables' run faster? > > > Santiago Soares > Fone: (41) 8488-0537 > > > On Thu, Feb 10, 2011 at 12:58 PM, Johan De Meersman <vegiv...@tuxera.be>wrote: > >> On Thu, Feb 10, 2011 at 2:15 PM, Santiago Soares < >> santiagosoa...@gmail.com> wrote: >> >>> With a show global status I see a strange behavior: >>> | Open_files | 286 | >>> | Opened_files | 1050743 | >>> >>> At this time the database has just started (about 10 minutes). >>> >> >> That's quite a lot for ten minutes, yes. Increasing the open table cache, >> query cache and/or index cache might help, depending on data size, table >> types (I'd assume mostly InnoDB based off your pool size), et cetera. >> >> Basically it's a matter of finding out why you open and close so many >> files, as that's likely to be one of the causes of the I/O waits. >> >> -- >> Bier met grenadyn >> Is als mosterd by den wyn >> Sy die't drinkt, is eene kwezel >> Hy die't drinkt, is ras een ezel >> > >
