Check your memory usage according to http://mysql.rjweb.org/doc.php/memory
> -----Original Message----- > From: Andrés Tello [mailto:mr.crip...@gmail.com] > Sent: Monday, April 23, 2012 9:00 AM > To: Malka Cymbalista > Cc: mysql@lists.mysql.com; Shlomit Afgin; Ronen Hayun > Subject: Re: problems with INNODB tables > > Weird, I use a lot Innodb, and no issue, I even kill bravely the mysql > process with pkill -9 -f mysql > > Y suppose the way drupal is being programed. > PHP open and closes database connections each time a webpage with db > access is issued. > When a php exceution ends and the apache webserver have fullfilled the > http request, again, php memory is freed and connections closed... > UNLESS:.. you are using a mem cached db connection, wich I doubt it > since drupal doens't requiere one, or using persistent connections, > again, I doubt it, because persistante database connections aren't > recommended to innodb tables... > > Mysql server by default can handles 100 conections, if you get to thata > limit you need to fine tune the number of connections allowed. > > show full processlist can give you a better idea of what is going on, > connections with the sleep status, are open connections with no > currently no transacctions... > > I never use script based stop, I always use mysqladmin -u root -p -h > localhost shutdown which properly tells mysql to flush tables and > terminate. > > I can almost bet that you are using Ubuntu... ubuntu had given me > sometimes very hard times because of the "edgy " code they use to use, > ext4 last version, and so on... what can you tell us about that? > > How much amount of memory you have? > How much concurrent apache/php users you have? > Can you provide more cuantitive data please? Hardware, php version, > distro, kernel... > > Cheers... > > > > To start, 100 process is quite a lot, something isn't fine. Each time > > On Mon, Apr 23, 2012 at 9:10 AM, Malka Cymbalista < > malki.cymbali...@weizmann.ac.il> wrote: > > > We are running MySQL version 5.0.45 on a Linux machine. Over the past > > few months we have been having several problems: > > > > 1. Our mysql processes have increased the memory used from > about .3% > > per process to 8% per process > > > > 2. We sometimes can have over 100 processes running which > brings the > > machine to its knees and we have to stop and start MySQL in order to > > kill all the processes. We think that maybe the processes are not > > finishing normally and are just hanging around. > > > > 3. The machine is a web server and in the last few months we > are > > moving over to drupal 7 to build our sites and Drupal 7 requires > INNODB > > tables. Sometimes, when we restart MySQL using the commands > > /etc/init.d/mysql stop and /etc/init.d/mysql start our sites that > were > > built in drupal 7 do not come up. In order for the INNODB tables to > > work, we have to stop mysql, rename the ibdata1 file, copy it back to > > ibdata1 and then restart mysql. Otherwise the INNODB tables are not > accessable. > > > > > > > > In the past all our tables were MYIASM. Our problems started as we > > started using more and more INNODB tables. Is there anything special > > that has to be done to configure MySQL when using INNODB tables? > > We clearly have a problem but we have no idea where to start > looking. Our > > error logs don't show anything. If anyone has any suggestions, we > will be > > happy to hear them. > > We are considering hiring a consultant who is an expert in MySQL. We > > are in Israel and we are open to suggestions. > > > > Thanks for any help. > > > > Malki Cymbalista > > Webmaster, Weizmann Institute of Science > > > malki.cymbali...@weizmann.ac.il<mailto:malki.cymbali...@weizmann.ac.il > > > > > 08-9343036 > > > > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
