Re: PG 8.3 and server load

From: Tom Lane
Subject: Re: PG 8.3 and server load
Date: ,
Msg-id: 23315.1250697761@sss.pgh.pa.us
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In response to: Re: PG 8.3 and server load  (Phoenix Kiula)
List: pgsql-performance

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PG 8.3 and server load  (Phoenix Kiula, )
 Re: PG 8.3 and server load  (Ivan Voras, )
  Re: PG 8.3 and server load  (Guillaume Cottenceau, )
 Re: PG 8.3 and server load  (Andy Colson, )
  Re: PG 8.3 and server load  (Karl Denninger, )
 Re: PG 8.3 and server load  (Andy Colson, )
  Re: PG 8.3 and server load  (Phoenix Kiula, )
   Re: PG 8.3 and server load  (Matthew Wakeling, )
  Re: PG 8.3 and server load  ("Kevin Grittner", )
   Re: PG 8.3 and server load  (Andy Colson, )
    Re: PG 8.3 and server load  (Phoenix Kiula, )
     Re: PG 8.3 and server load  (Andy Colson, )
     Re: PG 8.3 and server load  (Tom Lane, )
     Re: PG 8.3 and server load  (Guillaume Cottenceau, )
     Re: PG 8.3 and server load  (Scott Marlowe, )
      Re: PG 8.3 and server load  (Ivan Voras, )

Phoenix Kiula <> writes:
> top - 10:38:53 up 29 days, 5 min,  1 user,  load average: 64.99, 65.17,
> 65.06
> Tasks: 568 total,   1 running, 537 sleeping,   6 stopped,  24 zombie
> Cpu0  : 17.7% us,  7.7% sy,  0.0% ni, 74.0% id,  0.7% wa,  0.0% hi,  0.0% si
> Cpu1  :  6.3% us,  5.6% sy,  0.0% ni, 84.4% id,  3.6% wa,  0.0% hi,  0.0% si
> Cpu2  :  5.6% us,  5.9% sy,  0.0% ni, 86.8% id,  1.7% wa,  0.0% hi,  0.0% si
> Cpu3  :  5.6% us,  4.0% sy,  0.0% ni, 74.2% id, 16.2% wa,  0.0% hi,  0.0% si
> Mem:   8310256k total,  8277416k used,    32840k free,    61944k buffers
> Swap:  2096440k total,    16128k used,  2080312k free,  7664224k cached

It sure looks from here like your box is not under any particular
stress.  The only thing that suggests a problem is the high load
average, but since that doesn't agree with any other measurements,
I'm inclined to think that the load average is simply wrong.
Do you have any actual evidence of a problem (like slow response)?

(I've seen load averages that had nothing to do with observable
reality on other Unixes, though not before on RHEL.)

            regards, tom lane


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