Re: Did COPY performance regression solve in 8.4rc2?

"Kevin Grittner" <Kevin.Grittner@wicourts.gov> wrote:
> > - shared_buffers = 128MB
>  
> What happens with a larger value for shared_buffers?

COPY performance of PostgreSQL 8.4.0 was a little bit better than
PostgreSQL 8.3.0 when shared_buffes was 1GB.
My server has 2GB RAM.

* Shared_buffers = 1GB
- 8.4.0
real    31m13.873s
real    30m17.180s
real    29m16.170s
- 8.4rc2
real    29m46.035s
real    28m31.467s
real    29m5.781s
- 8.4rc1
real    29m35.403s
real    28m44.221s
real    29m20.309s
- 8.3.0
real    31m10.434s
real    32m39.912s
real    32m8.221s

* Shared_buffers = 512MB
- 8.4.0
real    28m37.817s
real    29m44.449s
real    28m10.886s
- 8.4rc2
real    28m0.657s
real    29m50.888s
real    28m28.037s
- 8.4rc1
real    28m58.592s
real    28m25.756s
real    30m11.641s
- 8.3.0
real    23m59.923s
real    24m13.717s
real    24m40.246s

Regards,

-- 
Toshihiro Kitagawa <kitagawa@sraoss.co.jp>
SRA OSS, Inc. Japan