Robert Haas robertmh...@gmail.com:
Do you by any chance have a bazillion databases in this cluster? Can
you do these?
select sum(1) from pg_database;
1555
select pg_relation_size('pg_database');
221184
select sum(pg_column_size(d.*)) from pg_database;
That gave me:
ERROR:
max_fsm_pages = 280
max_fsm_relations = 16
What does the last couple of lines from a 'vacuum analyze verbose'
say? I have max_fsm_pages = 400 and max_fsm_relations = 1500.
You can also try to lower random_page_cost to a lower value like 1.2
but I doubt this will help in your
Claus Guttesen kome...@gmail.com:
Would love to get some advice on how to change my conf settings / setup to
get better I/O performance.
Server Specs:
2x Intel Xeon Quad Core (@2 Ghz - Clovertown,L5335)
4GB RAM
4x Seagate 73GB SAS HDD 10k RPM - in RAID ( stripped and mirrored )
On Fri, Sep 4, 2009 at 08:54, Scott Otisscott.o...@intand.com wrote:
Robert Haas robertmh...@gmail.com:
Do you by any chance have a bazillion databases in this cluster? Can
you do these?
select sum(1) from pg_database;
1555
Note that there are two features in 8.4 specifically designed to
So is there anything I can do in 8.3 to help this? I have tried setting '
track_activities', 'track_counts' and 'autovacuum' to 'off' (which has reduced
CPU and I/O a bit) - but the stats collector process is still using up a good
deal of CPU and I/O - is there any way to turn stats collecting
Scott Otis scott.o...@intand.com wrote:
So is there anything I can do in 8.3 to help this? I have tried
setting 'track_activities', 'track_counts' and 'autovacuum' to 'off'
(which has reduced CPU and I/O a bit)
You're going to regret that very soon, unless you are *very* sure you
have
Scott Otis wrote:
2x Intel Xeon Quad Core (@2 Ghz - Clovertown,L5335)
4GB RAM
4x Seagate 73GB SAS HDD 10k RPM – in RAID ( stripped and mirrored )
Would love to get some advice on how to change my conf settings / setup
to get better I/O performance.
~1500 databases w/ ~60 tables each
Scott Otis wrote:
Would love to get some advice on how to change my conf settings / setup
to get better I/O performance.
Total I/O (these number are pretty constant throughout the day):
Reads: ~ 100 / sec for about 2.6 Mb/sec
Writes: ~ 400 /sec for about 46.1Mb/sec
Most of the SQL happening
Scott Otis wrote:
I agree that they don't make sense - part of the reason I am looking for
help :)
I am using iostat to get those numbers ( which I specify to average over
5 min then collect to display in Cacti ).
2 processes are taking up a good deal of CPU - the postgres stats
collector
Sorry about not responding to the whole list earlier - this is my first time
posting to a mailing list.
Would providing more information about the size and complexities of the
databases help?
I measure I/O stats with iostat - here is the command I use:
iostat -d -x mfid0 -t 290 2
I tried
Scott Otis wrote:
Sorry about not responding to the whole list earlier - this is my first time
posting to a mailing list.
Would providing more information about the size and complexities of the
databases help?
I measure I/O stats with iostat - here is the command I use:
iostat -d -x mfid0
On Thu, Sep 3, 2009 at 4:16 PM, Scott Otisscott.o...@intand.com wrote:
Sorry about not responding to the whole list earlier - this is my first time
posting to a mailing list.
Would providing more information about the size and complexities of the
databases help?
I measure I/O stats with
Robert Haas wrote:
On Thu, Sep 3, 2009 at 4:16 PM, Scott Otisscott.o...@intand.com wrote:
Sorry about not responding to the whole list earlier - this is my first time
posting to a mailing list.
Would providing more information about the size and complexities of the
databases help?
I measure
On Thu, Sep 3, 2009 at 5:27 PM, Andy Colsona...@squeakycode.net wrote:
Robert Haas wrote:
On Thu, Sep 3, 2009 at 4:16 PM, Scott Otisscott.o...@intand.com wrote:
Sorry about not responding to the whole list earlier - this is my first
time posting to a mailing list.
Would providing more
2009/9/3 Scott Otis scott.o...@intand.com:
Sorry about not responding to the whole list earlier - this is my first time
posting to a mailing list.
Would providing more information about the size and complexities of the
databases help?
I measure I/O stats with iostat - here is the command
Simply do iostat mfid0 1 and post 10 lines of its output.
tty mfid0 cpu
tin tout KB/t tps MB/s us ni sy in id
0 152 108.54 335 35.51 43 0 30 1 27
0 525 85.73 759 63.55 14 0 12 0 74
0 86 67.72 520 34.39 13 0 12 0 75
0 86 86.89 746 63.26
Can you post to the list all the uncommented lines from your
postgresql.conf file and attach the results of select * from
pg_stat_all_tables as an attachment?
I attached a CSV of select * from pg_stat_all_tables from one of our
more heavily used databases. Note: I turned off stats collection
On Thu, Sep 3, 2009 at 7:11 PM, Scott Otisscott.o...@intand.com wrote:
Can you post to the list all the uncommented lines from your
postgresql.conf file and attach the results of select * from
pg_stat_all_tables as an attachment?
I attached a CSV of select * from pg_stat_all_tables from one
Would love to get some advice on how to change my conf settings / setup
to get better I/O performance.
Server Specs:
2x Intel Xeon Quad Core (@2 Ghz - Clovertown,L5335)
4GB RAM
4x Seagate 73GB SAS HDD 10k RPM - in RAID ( stripped and mirrored )
FreeBSD 6.4
Apache 2.2
PostgreSQL
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