Re: pg_dump makes our system unusable - any way to pg_dump in the middle of the day? (postgres 8.4.4)

Our disk service times and % utilization (according to sar -d) while
running pg_dump are low.  For example:

01:23:08 AM       DEV       tps  rd_sec/s  wr_sec/s  avgrq-sz
avgqu-sz     await     svctm     %util
01:23:09 AM       sda   1473.00      0.00  98128.00     66.62
0.41      0.28      0.03      3.70
01:23:09 AM      sda1      0.00      0.00      0.00      0.00
0.00      0.00      0.00      0.00
01:23:09 AM      sda2   1473.00      0.00  98128.00     66.62
0.41      0.28      0.03      3.70
01:23:09 AM       sdb      1.00      0.00     16.00     16.00
0.00      3.00      3.00      0.30
01:23:09 AM      sdb1      1.00      0.00     16.00     16.00
0.00      3.00      3.00      0.30
01:23:09 AM       sdc      0.00      0.00      0.00      0.00
0.00      0.00      0.00      0.00
01:23:09 AM       sdd    678.00 161584.00      0.00    238.32
0.34      0.49      0.45     30.20
01:23:09 AM      sdd1    678.00 161584.00      0.00    238.32
0.34      0.49      0.45     30.20
01:23:09 AM     nodev  12266.00      0.00  98128.00      8.00
4.30      0.35      0.00      3.70
01:23:09 AM     nodev      0.00      0.00      0.00      0.00
0.00      0.00      0.00      0.00



On Fri, Feb 25, 2011 at 3:50 PM, Benjamin Smith
<lists@benjamindsmith.com> wrote:
> I'd also add: run pg_tune on your server. Made a *dramatic* difference for
> us.

Well, that's interesting.  I am going to try that, thanks!!

Aleksey.