Am 15.11.2011 01:42, schrieb Cody Caughlan:
We have anywhere from 60-80 background worker processes connecting to
Postgres, performing a short task and then disconnecting. The lifetime
of these tasks averages 1-3 seconds.
I know that there is some connection overhead to Postgres, but I dont
On Tue, Nov 15, 2011 at 11:08 AM, Stuart Bishop stu...@stuartbishop.net wrote:
On Fri, Nov 11, 2011 at 10:01 PM, Ruslan Zakirov r...@bestpractical.com
wrote:
Hello,
[snip]
In application such wrong estimation result in seq scan of this table
winning leading position in execution plans over
On 11/14/11 2:00 AM, Alexandru wrote:
I know there were a lot of performance issues with ext4, but i don't know the
state of it now.
I have a private openstreetmap server installed on a ubuntu 11.10 64bit pc
with both partitions (/ and /home) formated with ext4. My problem is that the
Unlogged table can increase speed, this table has about 1.6
millions of update per hour, but unlogged with a chance of loss
all information on a crash are not a good idea for this.
pg_dump -t 'tablename' from a cron job? (Make sure to rotate dump
file names, maybe with day of week or
On Tue, Nov 15, 2011 at 1:48 PM, Josh Berkus j...@agliodbs.com wrote:
On 11/14/11 2:00 AM, Alexandru wrote:
I know there were a lot of performance issues with ext4, but i don't know
the state of it now.
I have a private openstreetmap server installed on a ubuntu 11.10 64bit pc
with both
Dne 15.11.2011 01:13, Cody Caughlan napsal(a):
The first two are what I would think would be largely read operations
(certainly the SELECT) so its not clear why a SELECT consumes write
time.
Here is the output of some pg_stat_bgwriter stats from the last couple of
hours:
Dne 14.11.2011 22:58, Cody Caughlan napsal(a):
I ran bonnie++ on a slave node, doing active streaming replication but
otherwise idle:
http://batch-files-test.s3.amazonaws.com/sql03.prod.html
bonnie++ on the master node:
http://batch-files-test.s3.amazonaws.com/sql01.prod.html
If I am
On Tue, Nov 15, 2011 at 5:16 PM, Tomas Vondra t...@fuzzy.cz wrote:
Dne 14.11.2011 22:58, Cody Caughlan napsal(a):
I ran bonnie++ on a slave node, doing active streaming replication but
otherwise idle:
http://batch-files-test.s3.amazonaws.com/sql03.prod.html
bonnie++ on the master node:
On 16 Listopad 2011, 2:21, Cody Caughlan wrote:
How did you build your RAID array? Maybe I have a fundamental flaw /
misconfiguration. I am doing it via:
$ yes | mdadm --create /dev/md0 --level=10 -c256 --raid-devices=4
/dev/xvdb /dev/xvdc /dev/xvdd /dev/xvde
$ pvcreate /dev/md0
$ vgcreate
On 11/14/2011 05:00 AM, Alexandru wrote:
I know there were a lot of performance issues with ext4, but i don't
know the state of it now.
I have a private openstreetmap server installed on a ubuntu 11.10
64bit pc with both partitions (/ and /home) formated with ext4. My
problem is that the
On Tue, Nov 15, 2011 at 8:48 PM, Greg Smith g...@2ndquadrant.com wrote:
When you turn off the synchronous_commit parameter in the postgresql.conf,
the database will stop asking the filesystem to ensure things are on disk
this way. You can lose some data in the event of a crash, but things will
On Tue, Nov 15, 2011 at 10:48 PM, Greg Smith g...@2ndquadrant.com wrote:
In just about every other way
but commit performance, ext4 is faster than most other filesystems.
As someone who is looked at as an expert and knowledgable my many of
us, are
On 11/14/2011 01:16 PM, Cody Caughlan wrote:
We're starting to see some slow queries, especially COMMITs that are
happening more frequently. The slow queries are against seemingly
well-indexed tables.
Slow commits like:
2011-11-14 17:47:11 UTC pid:14366 (44/0-0) LOG: duration: 3062.784 ms
On 11/15/2011 10:54 PM, Aidan Van Dyk wrote:
are you getting to the point of migrating large XFS filesystems to
ext4 for production databases yet? Or at least using ext4 in new
large-scale filesystems for PG?
Not really. Last time I checked (a few months ago), there were still
some
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