[PERFORM] Deteriorating performance when loading large objects

2008-11-25 Thread Vegard Bønes
Hi, I have a problem with large objects in postgresql 8.1: The performance of loading large objects into a database goes way down after a few days of operation. I have a cron job kicking in twice a day, which generates and loads around 6000 large objects of 3.7MB each. Each night, old data is del

Re: [PERFORM] Deteriorating performance when loading large objects

2008-11-25 Thread Ivan Voras
Vegard Bønes wrote: > Hi, > > I have a problem with large objects in postgresql 8.1: The performance of > loading large objects into a database goes way down after a few days of > operation. > > I have a cron job kicking in twice a day, which generates and loads around > 6000 large objects of 3.7

Re: [PERFORM] Deteriorating performance when loading large objects

2008-11-25 Thread Tom Lane
"=?iso-8859-1?Q?Vegard_B=F8nes?=" <[EMAIL PROTECTED]> writes: > I have a problem with large objects in postgresql 8.1: The performance of > loading large objects into a database goes way down after a few days of > operation. > I have a cron job kicking in twice a day, which generates and loads aro

Re: [PERFORM] Monitoring buffercache...

2008-11-25 Thread Mark Kirkwood
Scott Marlowe wrote: On Mon, Nov 24, 2008 at 12:52 PM, Brad Nicholson <[EMAIL PROTECTED]> wrote: I just ran it in a loop over and over on my 8 core opteron server and it ran the load factor up by almost exactly 1.0. Under our normal daily load, it sits at 1.9 to 2.5, and it climbed to 2.9 un

[PERFORM] Partition table query performance

2008-11-25 Thread Greg Jaman
I have a problem with partitioning and I'm wondering if anyone can provide some insight. I'm trying to find the max value of a column across multiple partitions. The query against the partition set is quite slow while queries against child partitions is very fast! I setup a basic Range Partiti