Re: [GENERAL] A Question About Insertions -- Performance

2003-09-11 Thread Bruce Momjian
Vivek Khera wrote: TL == Tom Lane [EMAIL PROTECTED] writes: TL My best guess is that the dropoffs occur because of background checkpoint TL operations, but there's not enough info here to prove it. Four inserts TL per second seems horrendously slow in any case. I'll concur with this

Re: [GENERAL] A Question About Insertions -- Performance

2003-09-11 Thread Vivek Khera
BM == Bruce Momjian [EMAIL PROTECTED] writes: Check your logs to see if you are checkpointing too frequently. BM That warning message is only in 7.4. Yes, but the checkpoint activity is still logged. On my 7.2 system, I'm checkpointing about every 1.5 minutes at peak with 3 checkpoint

[GENERAL] A Question About Insertions -- Performance

2003-09-10 Thread Clay Luther
I am doing to large dataset performance tests with 7.3.4b2 today and I noticed an interesting phenomenon. My shared memory buffers are set at 128MB. Peak postmaster usage appears to be around 90MB. My test app performs inserts across 4 related tables, each set of 4 inserts representing a