Обсуждение: process hangs using perl?

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process hangs using perl?

От
"Patrick Hatcher"
Дата:
Running a perl script against my dev server (pg 7.3.4) that currently runs
fine on the production server.  And for some reason Pg always seems to hang
during the process (see below for Top print out).  This happens randomily
throughout the script and can be  on a SELECT, INSERT, or UPDATE statement,
but doesn't cause the Pg server to go down (which is good).  Any
suggestions on where to start looking?

Perl version 5.6.1




---Top print out

  4:08pm  up 23 days,  4:46,  3 users,  load average: 1.00, 1.05, 1.39
78 processes: 75 sleeping, 2 running, 1 zombie, 0 stopped
CPU0 states: 30.4% user,  4.0% system,  0.0% nice, 64.4% idle
CPU1 states: 47.0% user,  3.3% system,  0.0% nice, 49.0% idle
Mem:   513640K av,  505332K used,    8308K free,       0K shrd,   13176K
buff
Swap: 2044056K av,   48624K used, 1995432K free                  356028K
cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
16094 postgres  14   0 98.8M  97M 18900 R    85.2 19.4  31:38 postgres:
phatcher mdc_oz [local] SELECT
16655 postgres   9   0  1052 1052   836 R     0.1  0.2   0:00 top
14397 postgres   8   0  1964 1840  1708 S     0.0  0.3   0:00
/usr/local/postgresql7.3.4/bin/postmaster
14398 postgres   9   0  2932 2780  1700 S     0.0  0.5   0:03 postgres:
stats buffer process
14399 postgres   9   0  2168 2016  1704 S     0.0  0.3   0:05 postgres:
stats collector process
16074 postgres   9   0 23836  20M 18884 S     0.0  4.1  16:24 postgres:
phatcher mdc_oz [local] SELECT waiting
16076 postgres   9   0 21792  20M 18916 S     0.0  4.1 644:42 postgres:
phatcher mdc_oz [local] SELECT waiting
16546 postgres   9   0 17988  16M 17208 S     0.0  3.3   0:11 postgres:
phatcher mdc_oz [local] SELECT waiting
16650 postgres   9   0  1332 1332  1060 S     0.0  0.2   0:00 /bin/bash


TIA

Patrick Hatcher



Re: process hangs using perl?

От
Network Administrator
Дата:
Patrick,

Can you provide the code (or at least the relevant parts) for us to look at?


Quoting Patrick Hatcher <PHatcher@macys.com>:

> Running a perl script against my dev server (pg 7.3.4) that currently runs
> fine on the production server.  And for some reason Pg always seems to hang
> during the process (see below for Top print out).  This happens randomily
> throughout the script and can be  on a SELECT, INSERT, or UPDATE statement,
> but doesn't cause the Pg server to go down (which is good).  Any
> suggestions on where to start looking?
>
> Perl version 5.6.1
>
>
>
>
> ---Top print out
>
>   4:08pm  up 23 days,  4:46,  3 users,  load average: 1.00, 1.05, 1.39
> 78 processes: 75 sleeping, 2 running, 1 zombie, 0 stopped
> CPU0 states: 30.4% user,  4.0% system,  0.0% nice, 64.4% idle
> CPU1 states: 47.0% user,  3.3% system,  0.0% nice, 49.0% idle
> Mem:   513640K av,  505332K used,    8308K free,       0K shrd,   13176K
> buff
> Swap: 2044056K av,   48624K used, 1995432K free                  356028K
> cached
>
>   PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
> 16094 postgres  14   0 98.8M  97M 18900 R    85.2 19.4  31:38 postgres:
> phatcher mdc_oz [local] SELECT
> 16655 postgres   9   0  1052 1052   836 R     0.1  0.2   0:00 top
> 14397 postgres   8   0  1964 1840  1708 S     0.0  0.3   0:00
> /usr/local/postgresql7.3.4/bin/postmaster
> 14398 postgres   9   0  2932 2780  1700 S     0.0  0.5   0:03 postgres:
> stats buffer process
> 14399 postgres   9   0  2168 2016  1704 S     0.0  0.3   0:05 postgres:
> stats collector process
> 16074 postgres   9   0 23836  20M 18884 S     0.0  4.1  16:24 postgres:
> phatcher mdc_oz [local] SELECT waiting
> 16076 postgres   9   0 21792  20M 18916 S     0.0  4.1 644:42 postgres:
> phatcher mdc_oz [local] SELECT waiting
> 16546 postgres   9   0 17988  16M 17208 S     0.0  3.3   0:11 postgres:
> phatcher mdc_oz [local] SELECT waiting
> 16650 postgres   9   0  1332 1332  1060 S     0.0  0.2   0:00 /bin/bash
>
>
> TIA
>
> Patrick Hatcher
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>


--
Keith C. Perry
Director of Networks & Applications
VCSN, Inc.
http://vcsn.com

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