>>>>> On Tue, 16 Jun 2009 15:05:18 +0200, Tom Sommer said: > > Hi, > > I have a somewhat pressing problem with the performance of my Bacula > installation. > > My MySQL database currently holds 247,342,127 (36GB) records in the File > table, and 78,576,199 (10GB) records in the Filename table. > > Since 3.0.0, but even more since 3.0.1, I have a problem with queries > being really slow. Basically when doing a full backup of a server > (mailserver, LOTS of small files), I can have my MySQL hanging for up to > 24+ hours on queries like this: > > INSERT INTO Filename( Name ) > SELECT a.Name > FROM ( > > SELECT DISTINCT Name > FROM batch > ) AS a > WHERE NOT > EXISTS ( > > SELECT Name > FROM Filename AS f > WHERE f.Name = a.Name > ) > > with the status "Sending data", and a lot of other similar queries in > queue with the status "Locked". One of these queries take approx 10.000 > seconds to execute, but is just followed by another similar (identical) > query with the same duration. This is a problem mostly because it > prevents me doing restores while backups are "Dir inserting attributes" > > Obviously I would think it's a MySQL performance issue, but I was > wondering if anything had been done to the queries? They seem to be a > LOT slower and a LOT heavier. > I've just put more RAM into the server, but it's done little to improve > the duration of the queries. My server now has 4GB RAM (will update to > 6GB) - but again it's a recent issue, because Bacula has been running > perfectly for many months on 2GB RAM, until I updated to 3.0.1 > > I've done REPAIR TABLE and OPTIMIZE TABLE and seen no improvement. > > Finally if anyone have any specific ideas to improve performance on my > huge SQL database, please share :)
Sorry, I don't know how to optimize it. These queries are part of the new "batch insert" code. You can turn that off by passing --disable-batch-insert to configure when building Bacula. __Martin ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
