Re: [PERFORM] Postgres scalability and performance on windows

2006-11-24 Thread Tom Lane
"Gopal" <[EMAIL PROTECTED]> writes: > Thanks for your suggestions. Here's an output of the explain analyse. What's the query exactly, and what are the schemas of the tables it uses (psql \d descriptions would do)? The actual runtime seems to be almost all spent in the hash aggregation step: >

[PERFORM] Massive delete of rows, how to proceed?

2006-11-24 Thread Arnau
Hi all, I have a table with statistics with more than 15 million rows. I'd like to delete the oldest statistics and this can be about 7 million rows. Which method would you recommend me to do this? I'd be also interested in calculate some kind of statistics about these deleted rows, like how ma

Re: [PERFORM] Postgres scalability and performance on windows

2006-11-24 Thread Frank Wiles
On Fri, 24 Nov 2006 09:22:45 +0100 Guido Neitzer <[EMAIL PROTECTED]> wrote: > > effective_cache_size = 82728 # typically 8KB each > Hmm. I don't know what the real effect of this might be as the doc > states: > > "This parameter has no effect on the size of shared memory alloca

Re: [PERFORM] TPC-H Benchmark

2006-11-24 Thread Luke Lonergan
http://www.tpc.org/tpch/spec/tpch_20060831.tar.gz - Luke On 11/24/06 8:47 AM, "Felipe Rondon Rocha" <[EMAIL PROTECTED]> wrote: > Hi everyone, > > does anyone have the TPC-H benchmark for PostgreSQL? Can you tell me where can > i find the database and queries? > > Thks, > Felipe >

[PERFORM] TPC-H Benchmark

2006-11-24 Thread Felipe Rondon Rocha
Hi everyone, does anyone have the TPC-H benchmark for PostgreSQL? Can you tell me where can i find the database and queries? Thks, Felipe

Re: [PERFORM] Postgres scalability and performance on windows

2006-11-24 Thread Gopal
Hi, Thanks for your suggestions. Here's an output of the explain analyse. I'll change the shared_buffers and look at the behaviour again. "Limit (cost=59.53..59.53 rows=1 width=28) (actual time=15.681..15.681 rows=1 loops=1)" " -> Sort (cost=59.53..59.53 rows=1 width=28) (actual time=15.678..

Re: [PERFORM] Postgres scalability and performance on windows

2006-11-24 Thread Guido Neitzer
Am 23.11.2006 um 23:37 schrieb Gopal: hared_buffers = 2# min 16 or max_connections*2, 8KB each If this is not a copy & paste error, you should add the "s" at the beginning of the line. Also you might want to set this to a higher number. You are setting about