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тАО11-28-2005 09:23 PM
тАО11-28-2005 09:23 PM
I have alpha server 8200 with OpenVMS version 7.3-1 running Oracle RDB/Cobol and Oracle RDBMS 8i. We upgraded the OS to 7.3-2 and the Oracle RDBMS to 9.2.0.5 and we increased the memory from 2GB to 6GB after that we notesed that the memory become 99% used and the system become loaded and many of the proceses become swapped out.
Note : no thing made to the applications for both RDB & RDBMS, no thing changed for the accounts or sysgen params.
are there any thing to check or do.
This is a critical system.
Regards
Solved! Go to Solution.
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тАО11-28-2005 09:34 PM
тАО11-28-2005 09:34 PM
Re: 6GB Memory become full
First things to look at is SHOW SYSTEM (look for memory hogs in the "Pages" column), SHOW MEMORY (of course) and execute
@SYS$UPDATE:AUTOGEN SAVPARAMS TESTFILES CHECK_FEEDBACK to see what alterations you might have to do to the system paramaters.
Regards,
Kris (aka Qkcl)
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тАО11-28-2005 09:44 PM
тАО11-28-2005 09:44 PM
Re: 6GB Memory become full
maybe you already did, but just to make sure:
Oracle has guidelines for things to change when you go from V8x to V9x.
Several of those will deal with SYSGEN params. Be sure to apply them!
Then run for at least 24 hours, with a representative load, and execute AUTOGEN as Kris wrote.
Success.
Proost.
Have one on me.
jpe
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тАО11-28-2005 10:16 PM
тАО11-28-2005 10:16 PM
Re: 6GB Memory become full
are you using reserved memory for your Oracle instance?
And if yes, how large is it?
Rgds
Marc
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тАО11-28-2005 10:49 PM
тАО11-28-2005 10:49 PM
Re: 6GB Memory become full
Yes we have reserved memory 2.5GB
Regards
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тАО11-29-2005 12:29 AM
тАО11-29-2005 12:29 AM
Re: 6GB Memory become full
So you are using more reserved memory then you did in previous version. And you thus have 3.5 Gb left for system.
Can you check how many Oracle 'user' processes there are? (process name should start with ora). You will find the background processes and some server processes.
Now, using almost all memory is not really bad, but if many processes are outswapped then it might not be ok.
Autogen might help you, but i guess you have to find out what is using lots of memory that was not there in previous install.
Rgds
Marc
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тАО11-29-2005 12:31 AM
тАО11-29-2005 12:31 AM
Re: 6GB Memory become full
Purely Personal Opinion
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тАО11-29-2005 12:59 AM
тАО11-29-2005 12:59 AM
Re: 6GB Memory become full
Under 7.3-2, as soon as there has been any decent amount of memory been used, the _FREE_ memory is held "occupied" by the XFC cache. So, very soon your memory will _LOOK_ fully used.
$ SHOW MEMO/CACH
begins with "Allocated"
You can add that amount to your Free memory, as the cache will free it the moment there is demand.
hth
Proost.
Have one on me.
jpe
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тАО11-29-2005 02:15 AM
тАО11-29-2005 02:15 AM
Re: 6GB Memory become full
Now you have more physical memory and you have set aside 2G reserved memory for Oracle. One assumes you also changed the Oracle SGA params in init.ora to exploit this new found memory.
Did you make sur the new, larger sga is actually using the reserved memory and not 'double dipping' by having it reserved but allocating from normal memory?
fwiw,
Hein.
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тАО11-30-2005 08:27 PM
тАО11-30-2005 08:27 PM
Re: 6GB Memory become full
Thanks for help,
I checked all what you asked me for, I will upload a text file with some information about the users,memory, oracle account, sysgen params, one of the users account.
best regards.
Mahmoud