On Mon, 2006-03-20 at 15:59 +0100, Mikael Carneholm wrote:
This gives that 10Gb takes ~380s = ~27Mb/s (with fsync=off), compared to
the raw dd result (~75.5Mb/s).
I assume this difference is due to:
- simultaneous WAL write activity (assumed: for each byte written to the
table, at least
On Wed, Mar 22, 2006 at 10:04:49AM +0100, Mikael Carneholm wrote:
It does (LOG: checkpoints are occurring too frequently (2 seconds apart))
However, I tried increasing checkpoint_segments to 32 (512Mb) making it
checkpoint every 15 second or so, but that gave a more uneven insert rate
than
To: Mikael Carneholm
Cc: Simon Riggs; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Migration study, step 1: bulk write
performanceoptimization
On Wed, Mar 22, 2006 at 10:04:49AM +0100, Mikael Carneholm wrote:
It does (LOG: checkpoints are occurring too frequently (2 seconds apart
Jim C. Nasby [EMAIL PROTECTED] writes:
On Wed, Mar 22, 2006 at 10:04:49AM +0100, Mikael Carneholm wrote:
It does (LOG: checkpoints are occurring too frequently (2 seconds apart))
However, I tried increasing checkpoint_segments to 32 (512Mb) making it
checkpoint every 15 second or so, but
