Increasing the SGA Size to Reduce CPU Run Queues?

I got the following e-mail message from one of our UNIX admins and wanted to know if anyone can shed some light on this:
I was just talking to [a consultant] about the problems on [the database server] and he pointed out that he has seen extremely high CPU run queues on this server, despite the fact that average CPU usage is not hitting 100%. We did some more digging and memory is being poorly utilized on this server. There is a lot of available memory that is not being used. We think that the run queues are running up because we have multiple reports coming in and sitting on the individual CPUs but they aren't able to fully utilize the available CPU. We were wondering if it would be possible to adjust the database to use more of the available memory and see if that allows the queries to use the CPU more effectively.

jdurst wrote:
I got the following e-mail message from one of our UNIX admins and wanted to know if anyone can shed some light on this:
I was just talking to [a consultant] about the problems on [the database server] and he pointed out that he has seen extremely high CPU run queues on this server, despite the fact that average CPU usage is not hitting 100%. We did some more digging and memory is being poorly utilized on this server. There is a lot of available memory that is not being used. We think that the run queues are running up because we have multiple reports coming in and sitting on the individual CPUs but they aren't able to fully utilize the available CPU. We were wondering if it would be possible to adjust the database to use more of the available memory and see if that allows the queries to use the CPU more effectively.First, [read these comments.|http://prodlife.wordpress.com/2008/05/06/newsflash-100-cpu-is-worse-than-you-think/#comments]
So, there are a lot of things that could be happening, and your post doesn't even begin to point in the right direction. Is your system heavily batched? You might speed report things up by slowing down the batch and letting other things use the cpu's. What does Oracle think it is waiting on?
As the comments cited above suggest, Cary's book addresses how to figure these things out. Big CPU run queues are certainly an indication of tuning necessity, perhaps on both the Oracle and OS side. It could even be something silly like I/O being too slow so the CPU's are waiting on that stuff. There are enough variables involved it can very quickly become like squeezing balloon animals if you don't use a structured approach.
So, what all hardware is involved? What are your init.ora parameters? What exact versions of everything? What do OS utilities show?

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How to Increase the SGA Size.

Hi Guru's
I want to Know
How to Increase the SGA Size in Database 8.1.7.4.1
My Ram Size is 6 GB
When I query the Below Script
select name, value
from v$parameter
where name in ('shared_pool_size', 'java_pool_size', 'streams_pool_size',
'log_buffer', 'db_cache_size', 'db_2k_cache_size', 'db_4k_cache_size',
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'db_keep_cache_size', 'db_recycle_cache_size', 'large_pool_size');
Result
shared_pool_size     300000000
large_pool_size     0
java_pool_size     50000000
log_buffer     10485760
Please Suggest Me the How Much Value also to increase the SGA
My RAM SIZE is 6 GB
Regards
***SBJ***

SGA size on 8i is static , and for increasing the size you have to make the changes in the pfile and bounce the database
First thumb rule is that your SGA should not exceed more than 40% of your PHYSICAL RAM in oracle <= 8i version. You can go around 80% from oracle 9i onwards
http://mohamedazar.wordpress.com/2010/08/30/can-i-increase-sga-target-size-greater-than-sga-max-size/
Edited by: Amigo on Dec 18, 2010 1:31 AM

Increase the SGA size!

Hi,
We are using EBS 12.0.6 and DB 10.2.0.3.
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thx.

Hi again;
In addition to my previous post also check
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How To Use Automatic Shared Memory Management (ASMM) In Oracle10g Doc ID: 295626.1
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Hi,
Iam using oracle 9i OS Solaris version 9.2.0.6
I am new to Oracle Database and i learn DBA any help me.
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Hi.It is correct that you must look into the documentation as the first-point-of-resource.It will be more quicker than to wait for the reply here.Not to say that don't post your question but do a search, get some thing in your hand,read it and when you dont understand it than post the question here.It will be more better approach of learning.
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http://download.oracle.com/docs/cd/B10501_01/server.920/a96521/create.htm#998095
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2009-08-19 09:08:51.863--Processing Step: starting OPMN
2009-08-19 09:09:00.394--Processing Step: starting OPMN managed processes
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<?xml version='1.0' encoding='WINDOWS-1252'?>
<response>
<msg code="-82" text="Remote request with weak authentication.">
</msg>
<opmn id="01hw117905:6200" http-status="206" http-response="2 of 3 processes started.">
<ias-instance id="SOA.01hw117905.India.TCS.com">
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</process-set>
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<msg code="0" text="">
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Increase the SGA and PGA size

Hello Guru,
How do i check what is my SGA and PGA..I am using TOAD..
I need to increase the SGA and PGA size...Please help..
I have a table having 200 million records, all indexes are there for the column..But it hang on in the debugging mode and also compile mode..
So i believe, I need to increase the SGA and PGA size...
Thanks,
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805936 wrote:
Hello Guru,
How do i check what is my SGA and PGA..I am using TOAD..
I need to increase the SGA and PGA size...Please help..
The current size for both SGA and PGA can be shown depending on the version of the db. For 10g, the SGA size is shown by sga_target parameter and PGA size is shown by pga_aggregate_target parameter. For 11g, the parameter memory_target sets them both.
I have a table having 200 million records, all indexes are there for the column..But it hang on in the debugging mode and also compile mode..
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