On Mon, 7 Oct 2002, Jon Shoberg wrote: > Ok, > > So how do I optimize memory usage? Where to start ? > > -Jon > > -----Original Message----- > From: Dan Nelson [mailto:[EMAIL PROTECTED]] > Sent: Monday, October 07, 2002 9:16 PM > To: Jon Shoberg > Cc: [EMAIL PROTECTED] > Subject: Re: .Optimize mySQL memory usage ? 41MB threads ?? > > In the last episode (Oct 07), Jon Shoberg said: > > I have a small PHP website that gets a fair amount of traffic. It's > > a simple layout with two tables. I average about 50 concurrently open > > apache sessions and 40 open mysql connections. I am calling for > > persistent connections from the mySQL/PHP API. > > > > But here is the kicker. Each mySQL thread takes about 41mb!! :( Can > > anyone point me to resources on optimizing mySQL's memory usage under > > a moderate/heavy load? > > Threads have no memory. You're getting misled by Linuxes threads > implementation, which displays each thread as if it were a separate > process. They actually share the same block of memory, which is why > they're threads and not processes. > >
add set-variable = key_buffer=128M to my.cnf file. actually 128M should be the sum of all the index (*.MYI) files. FYI - mysql only caches data read from indexes you can check innodb buffer usage or hit ratios by running the innodb_monitor. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
