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10-14-2004 12:34 AM
10-14-2004 12:34 AM
memory issue
Thanks,
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10-14-2004 12:56 AM
10-14-2004 12:56 AM
Re: memory issue
What is the oracle version that runs on new server?? Is it same as that of old version??
What are the buffer cache settings? What are the SGA settings on new server??
Anil
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10-14-2004 01:24 AM
10-14-2004 01:24 AM
Re: memory issue
That way we can see what patches you already have loaded and what might apply to the situation.
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10-14-2004 01:26 AM
10-14-2004 01:26 AM
Re: memory issue
Can you post the last two lines in the 'memory' window (hotkey - m ) in glance?.
Compare it with what you had on 11.0 before.
11i does take up little more memory than 11.0 but not in the order of Gigs.
-Sri
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10-14-2004 01:29 AM
10-14-2004 01:29 AM
Re: memory issue
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10-14-2004 01:43 AM
10-14-2004 01:43 AM
Re: memory issue
Oracle and I/O Cache.
Both OS and Oracle uses a cache for disks IO. Double cache implies memory overload and bad IO rate.
Ways to solve the problem :
. Mount the FS with Oracl DB files with convosync=direct, mincache=direct and nodatainlog options. First two options will bypass the OS IO cache.
. Tune your OS kernel parameters dbc_min_pct and dbc_max_pct. They rule the IO cache size. They default on 50% for max value, so that, Oracle running, your cache will soon use 16GB !!! Reducing values with such a memory will surely help.
Other points like 11i using more memory are also true (but you said you added 4GB RAM).
Regards,
Fred
"Reality is just a point of view." (P. K. D.)
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10-14-2004 01:50 AM
10-14-2004 01:50 AM
Re: memory issue
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10-14-2004 02:00 AM
10-14-2004 02:00 AM
Re: memory issue
See this doc:
http://www1.itrc.hp.com/service/cki/search.do?category=c0&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty&searchString=UPERFKBAN00000726&search.y=8&search.x=28&mode=id&admit=-682735245+1097762347865+28353475&searchCrit=allwords
Collect some data over time with a script(attached) and your system can be turned into a smoking well tuned machine.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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10-14-2004 02:00 AM
10-14-2004 02:00 AM
Re: memory issue
Have you changed OS Version ? (This question have been asked, but I didn't saw answer)
Regards,
Fred
"Reality is just a point of view." (P. K. D.)
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10-14-2004 02:12 AM
10-14-2004 02:12 AM
Re: memory issue
Total VM : 243.1mb Sys Mem : 3.99gb User Mem: 285.3mb Phys Mem: 32.0gb
Active VM: 167.3mb Buf Cache: 654.7mb Free Mem: 27.1gb
Above is an RP8400 with 32GB of memory. As you see Sys Mem is only 4 GB. I would like to see how different your output is.
-Sri
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10-14-2004 02:50 AM
10-14-2004 02:50 AM
Re: memory issue
GLANCE MEMORY STATS
total vm: 33.7gb
active: 4.64gb
phys mem: 36gb
user mem: 24gb
sys mem: 4.73gb
free mem: 6.53gb
Buffer Cache:195MB
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10-14-2004 03:02 AM
10-14-2004 03:02 AM
Re: memory issue
what are the values of shmmax, oracle sga??
Anil
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10-14-2004 03:02 AM
10-14-2004 03:02 AM
Re: memory issue
I believe things other than the OS also changed. 24GB is used by 'user' processes which is 75%.
You still have 6.5 GB available. So, you are not really bottlenecking on memory. So, the device swap you are seeing may be due to memory mapped files.
So, adding another 4GB is not really going to help as the system is not memory constrained yet.
-Sri
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10-14-2004 07:33 AM
10-14-2004 07:33 AM
Re: memory issue
Doc id 204510.1