Hi all,
I'm trying to work out why my 8.1 system is slower than my 7.4 system
for importing data.
The import is a lot of insert into commands - it's a converted
database from another system so I can't change it to copy commands.
My uncommented config options:
autovacuum = off
On Tue, 14 Mar 2006, Chris wrote:
Hi all,
I'm trying to work out why my 8.1 system is slower than my 7.4 system
for importing data.
The import is a lot of insert into commands - it's a converted
database from another system so I can't change it to copy commands.
My uncommented config
[Snip]
shared_buffers = 256
Make this higher too. If this is a dedicated machine with 512 MB of
ram,
set it to something like 125000.
You may need to adjust shared memory settings for your operating
system.
See the manual for details.
Whoa. Maybe I'm wrong, but isn't each buffer
Gavin Sherry wrote:
On Tue, 14 Mar 2006, Chris wrote:
Hi all,
I'm trying to work out why my 8.1 system is slower than my 7.4 system
for importing data.
The import is a lot of insert into commands - it's a converted
database from another system so I can't change it to copy commands.
snip
Frank Wiles wrote:
On Tue, 14 Mar 2006 12:24:22 +1100
Chris [EMAIL PROTECTED] wrote:
Gavin Sherry wrote:
On Tue, 14 Mar 2006, Chris wrote:
Hi all,
I'm trying to work out why my 8.1 system is slower than my 7.4
system for importing data.
The import is a lot of insert into commands -
Chris [EMAIL PROTECTED] writes:
Tons of difference :/
Have you checked that the I/O performance is comparable? It seems
possible that there's something badly misconfigured about the disks
on your new machine. Benchmarking with bonnie or some such would
be useful; also try looking at iostat 1
On Tue, 14 Mar 2006 12:42:21 +1100
Chris [EMAIL PROTECTED] wrote:
Different hardware.
7.4 is running on a 500MHz computer with 256M compared to 8.1 running
on a 2.6GHz with 512M.
Well when it comes to inserts CPU and RAM have almost nothing to do
with it. What are the hard disk
Tom Lane wrote:
Chris [EMAIL PROTECTED] writes:
Tons of difference :/
Have you checked that the I/O performance is comparable? It seems
possible that there's something badly misconfigured about the disks
on your new machine. Benchmarking with bonnie or some such would
be useful; also try
On Tue, 14 Mar 2006, Chris wrote:
The only other thing I can see is the old server is ext2:
/dev/hda4 on / type ext2 (rw,errors=remount-ro)
the new one is ext3:
/dev/hda2 on / type ext3 (rw)
this is actually a fairly significant difference.
with ext3 most of your data actually gets written
David Lang wrote:
On Tue, 14 Mar 2006, Chris wrote:
The only other thing I can see is the old server is ext2:
/dev/hda4 on / type ext2 (rw,errors=remount-ro)
the new one is ext3:
/dev/hda2 on / type ext3 (rw)
this is actually a fairly significant difference.
with ext3 most of your data
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