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тАО02-05-2009 05:59 PM
тАО02-05-2009 05:59 PM
High Memory Utilization Reported by Glance
We have a server which is having a high memory utilization.It is still not in production and very less users connected but still its using lots of memory space i have investigated the issue and it seems oracle db is using the max memory and for the same i have attached my observation in a notepad file could you guys please look into the notepad file and help me fix the issue or provide your suggestion.
Thanks all in advance.
Regards
Coolsami
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тАО02-05-2009 06:02 PM
тАО02-05-2009 06:02 PM
Re: High Memory Utilization Reported by Glance
Regards
Coolsami
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тАО02-05-2009 06:14 PM
тАО02-05-2009 06:14 PM
Re: High Memory Utilization Reported by Glance
Your dbc_max_pct is 9 & dbc_min_pct is 6.
Why do you think memory use is a problem? Is the server working fine?
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тАО02-06-2009 09:46 AM
тАО02-06-2009 09:46 AM
Re: High Memory Utilization Reported by Glance
Regards
Coolsami
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тАО02-06-2009 09:55 AM
тАО02-06-2009 09:55 AM
Re: High Memory Utilization Reported by Glance
I could see that you are having 4GB of physical memory and you have oracle on the server. 4GB is not sufficient for oracle servers.
You said only oracle processes are occupying more memory. So it is clear that user process consumes all the memory. Either you need to work with oracle to find if those process really need that much memory or not. If yes increase the memory.
Ganesh.
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тАО02-06-2009 10:07 AM
тАО02-06-2009 10:07 AM
Re: High Memory Utilization Reported by Glance
Thanks
Coolsami
Note : i will provide 1 point for each reply from all hp ux itrc guys.
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тАО02-06-2009 11:07 AM
тАО02-06-2009 11:07 AM
Re: High Memory Utilization Reported by Glance
It is my personal experience that oracle db server needs more memory depends on how many instances and the user sessions. If you need document probably you can get it from oracle on the memory needs.
There are worthful tools available from HP to get into deep on which process consumes how much physical memory. one is kmeminfo which will provide memory usage on each and every procoess.
Based on that you can decide how much memory oracle process are taking.
I really like your quote:
"Note : i will provide 1 point for each reply from all hp ux itrc guys"
Ganesh.
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тАО02-06-2009 02:17 PM
тАО02-06-2009 02:17 PM
Re: High Memory Utilization Reported by Glance
Why? Their answer is not under an HP maintenance agreement or a call that you placed with HP support at ITRC. This is the free HP forums. Check out the forum etiquette at http://forums13.itrc.hp.com/service/forums/helptips.do?#overview
Now, oracle is using 1.2GB of memory in shared mem segments. Usually that's the size of the oracle SGA. To that you need to add all the memory that the running oracle processes use. Many oracle binaries are 200 - 300 MB in size and you have at least 20 oracle processes running. Shared pages do help with this but up to a point. Then you have the OS overhead. It appears that you are running CIM and/or SIM, if you don't need them you should turn them off along with the apache web server. And last you have the OS daemons which you did not list them all, buffer cache which is 360MB and the kernel itself.
In glance you should hit the "m" key to show the memory details.
I also think that 4GB is not enough for a database server these days. You have a rp8420 with 11.23, the HP-UX 10.20 days with minimal memory usage are gone.
Once you users start to hit the database your memory utilization will probably increase accordingly.
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тАО02-09-2009 05:20 PM
тАО02-09-2009 05:20 PM
Re: High Memory Utilization Reported by Glance
The main question is
1. Are you ever getting low on memory where you are doing page outs. If you are doing any page outs you are low on memory (or DBC_max is too high)
2. Are your processes waiting on VM ? or can your processes run as fast as they can and never waiting on VM. (look at global wait states).
If you dont have a memory bottleneck look for other stuff.