Re: PostgreSQL 9.0.4 blocking in lseek? - Mailing list pgsql-performance

From Sören Meyer-Eppler
Subject Re: PostgreSQL 9.0.4 blocking in lseek?
Date
Msg-id 4EAEAC21.5080209@google.com
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In response to Re: PostgreSQL 9.0.4 blocking in lseek?  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: PostgreSQL 9.0.4 blocking in lseek?  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-performance
> embedded in often-executed plpgsql functions, for instance.  Can you
> identify which table the lseeks are issued against?

I wouldn't know how? I'm just using htop and "s" on the postgres process
to find these...

> (Now, having said that, I don't see how that type of theory explains no
> CPU load.

My bad sorry. I was relaying information from the guy administering the
server. It turns out that "no CPU load" really meant: only one of the
cores is being utilized. On a 16 core machine that looks like "no load"
but of course for the individual query still means 100%.

> But you're really going to need to provide more info before
> anyone can explain it, and finding out what the lseeks are on would be
> one good step.)

I have attached two of the offending execution plans. Anything obviously
wrong with them?

thank you for looking into it!

     Sören

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