Hmm.., I thought the temp tables were created in the temp directory. What version of MySQL are you using?
Perhaps you can temporarily increase the user's hard_limit, and not increase the soft_limit. When they have finished recovering, you can reset the hard_limit. Or perhaps it is possible to copy the corrupted database to the temp directory (with increased hard_limit), perform the recovery there, then copy it back. The data directory does not have to remain in the same location in order to be recoverable. This would be the same as the last e-mailed proposed solution, but with two extra steps to copy back and forth from the temp directory. -RG ----- Original Message ----- From: "Artem Kuchin" <[EMAIL PROTECTED]> To: "Russell E Glaue" <[EMAIL PROTECTED]>, mysql@lists.mysql.com Sent: Sunday, December 9, 2007 9:03:45 AM (GMT-0600) America/Chicago Subject: Re: How to auto repair db on hosting with quota I won't convert thread style, so, i'm top-posting :) All this would be great if it worked. The main problem is that temporary directory option for mysqld iS NOT USED while doing table repair. All files while repairing tables are placed in the same directoty with the same owner and group as the original database files (i mean, for example, .TMD files which can be huge!). So, i am currenctly stuck with no solultion to the problem. -- Artem Russell E Glaue wrote: > Using Quota on Unix, you can specify a different quota soft_limit for > temporary space. > You can set MySQL to use /tmp as the temporary space, then set a > soft_limit of 10mb and a hard_limit of 300MB. > This quota should be separate from the normal user space quota. > > With MySQL temp dir set to /tmp, and a soft/hard quota as 10MB/300MB, > the recovery should occur successfully. > And going above the soft_limit gives the user X amount of days to get > back down below the soft_limit. And the user cannot go above the > hard_limit. > You can set the soft_limit recovery days to like 1 day. They can go > over the 10MB soft_limit for 1 day, up to the hard_limit of 300MB, > but after one day the temp files will be deleted until the soft_limit > is satisfied. > > This is a great way to control temp space, and not let users abuse > it, but still give them a lot of space to perform things like large > mysql database recoveries. > > > -RG > > > Artem Kuchin wrote: >> I am asking this question as a hosting PROVIDER, not >> as a hosting client. >> >> The sitation is like this (this is a simple example with small >> numbers): >> >> 1) a client has 100mb quota for site and db files (set on unix group) >> 2) 80mb is already taken by 75MB database in ONE TABLE and 5mb of >> files 3) databases gets broken >> 4) mysql tried to auto repair the table >> 5) to repair data it must create a temporary file and this files take >> almost as much as 75MB >> 6) user goes over quota becauase mysql needs another 75MB to reapir >> table, and this summs up like 75+75+5 a lot > than 100mb in quota >> 7) mysql gets stuck on this db >> 8) people continue to acccess site and connections build up and each >> connection waits for repair to be finished >> 9) eventually mysql runs out of connections and this stop other >> clients too. >> 10) day is ruined. >> >> SO the questions are: >> >> 1) Is the way to specify USER/GROUP and PLACE for temporary files >> for table repair? >> 2) Maybe there is some OTHER way to set quota for databases? >> 3) Is there way to specify max number of connections for a user? >> >> Current solution for this as i see it is to make a daemon which >> must connect to database first with administrative privs and >> monitor number of connections and repairs using processlist. If some >> user does more than allowed number of connection then just kill them >> off. If repair accures - then turn off that host for a while and >> turn if back on again >> when repair finished. >> >> I wonder how it is solved on mass hosting servers. >> >> -- >> Regards, >> Artem -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
