RE: large uga/pga and scan rates

From: Henry Poras <Henry.Poras_at_ctp.com>
Date: Fri, 8 Dec 2000 13:28:11 -0500
Message-Id: <10704.124089@fatcity.com>

Ron,
It definitely is a dedicated server process. Monitoring the process = size and
the uga/pga size (by v$sesstat) shows a continual increase in size over time. I killed it when it reached ~ 500M (that took about 5 hours).

Henry

-----Original Message-----
From: Ron Rogers [mailto:RROGERS_at_galottery.org] Sent: Friday, December 08, 2000 12:36 PM To: Multiple recipients of list ORACLE-L Subject: Re: large uga/pga and scan rates

In the Oracle 8i Concepts manual pg 7-16 states" Once connected, a user = can
never run out of PGA space; there is either enough or not enough memory = to
connect in the first place." It could be that the user is creating a = large
amount of session information that is storred in the PGA on a dedicated server.
This might be an indication of what is happening. Querry your system to "see" who is doing what.
ROR m=AA=BF=AAm

>>> Henry.Poras_at_ctp.com 12/08/00 11:17AM >>>
I have come across a strange problem on one of my production machines = and
the more I think about it the more confused I'm getting (maybe the = right
approach is to act first, think later). The problem is coming from a = LARGE
group-by query (with functions in the select). Over time, the user = process
memory (Sun Solaris. Measured using ps -el) is growing ever larger. The = size
is consistent to what I read from v$sesstat (session uga memory, = session pga
memory). After a few hours, scan rates go through the roof.=20

Now, I thought that PGA size was fixed, and couldn't grow indefinitely. = What
is going on here and what can I do about it (besides killing the user = or
adding more memory).

Thanks.

Henry
--=20
Please see the official ORACLE-L FAQ: http://www.orafaq.com=20 --=20
Author: Henry Poras
INET: Henry.Poras_at_ctp.com=20

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--=20
Please see the official ORACLE-L FAQ: http://www.orafaq.com --=20
Author: Ron Rogers
INET: RROGERS_at_galottery.org

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