database using more memory than allocated
Date: Wed, 30 Sep 2015 18:05:10 -0700
Message-ID: <CAKsxbLom3R5oPFw7AMrijqRpUiGoJW0-8h=-2wzDhooZd9NBNQ_at_mail.gmail.com>
We are having some major memory issues with one of our databases today. I have the following parameter set.
memory_max_target = 8g
memory_target=4g
11.2.0.4 EE database on Windows Server 2008R2
So the database is only supposed to use 4gb but it got up to 84gb before it
took down the server. We think we found the application that caused but
not the database reason. We have 300 external sites that push us data
every minute. We didn't realize for half the day that it wasn't working.
Around noon apparently it started working and I was able to see that the
Windows service for that database was allocated 84gb before it killed the
entire server.
Once we discovered that this service started working we decided to allow
each location to upload 1 at a time, then 5, 10, 25, everything was fine
until we got to 250 locations. Then all of a sudden the memory jump up
really fast to 40gb before I manually stopped the database and we stopped
all external loads.
Why would the database use more memory that has been set to use. I have
been trying to go through ASH and AWR but it is hard to get a good picture
because we keep on having to restart the database. Tomorrow morning we are
going to work on it again.
I am really lost on this so if anybody can offer any suggestions I would
appreciate it.
I was going to create a SR but apparently Oracle is having an unplanned downtime for their site. Maybe this is a bigger issue that I thought :)
-- http://www.freelists.org/webpage/oracle-lReceived on Thu Oct 01 2015 - 03:05:10 CEST