Re: [SQL] Performance on large functions

2001-08-27 Thread Tom Lane
"Josh Berkus" <[EMAIL PROTECTED]> writes: > Thanks for the response. Chris Ruprecht and I got into an off-list > conversation and basically determined that the problem is 90% likely to > be disk access time. Hmm. Can you cut the amount of disk access by reducing the number of updates that you d

Re: [SQL] Performance on large functions

2001-08-27 Thread Josh Berkus
Tom, > I kinda doubt it. More likely sources of trouble involve the > optimizer > picking bad plans because it can't see the exact values being used in > queries. Can you show us the details of the function? Thanks for the response. Chris Ruprecht and I got into an off-list conversation and b

Re: [SQL] Performance on large functions

2001-08-27 Thread Tom Lane
"Josh Berkus" <[EMAIL PROTECTED]> writes: > I can't help but feel that, because functions wrap everything in a > transaction, some sort of tinkering with the xlog settings/performance > is called for ... I kinda doubt it. More likely sources of trouble involve the optimizer picking bad plans bec

[SQL] Performance on large functions

2001-08-27 Thread Josh Berkus
Folks, I have this function that adds 100-900 rows to a table and then unpdates them 12 times using data pulled from all over the database. I've increased the pgsql buffer, the sort memory, and wal_files significantly (2048, 1024 and 16) as well as adding a few relevant indexes. However, this f