RE: Compaq Server not releasing Memory

From: <Yerpude_at_btnl.com>
Date: Fri, 16 Mar 2001 23:56:36 -0800
Message-ID: <F001.002CFCD3.20010316233521@fatcity.com>

Is your Application performance affetced by this. I increased the SGA to 400MB from 80MB and then exceuted a simple count(*) from a table containing 10000 recores. Eariler this was reducing the memory by 3-4% but amazing this time is was 20-30% in one select. I am monitoring it via system information tool available on server.

Regds...

                                                                                       
                            
                    SELVAM_at_zamila                                                      
                            
                    c.com                To:     Yerpude_at_btnl.com, 
oracledba_at_quickdoc.co.uk, ORACLE-L_at_fatcity.com  
                    Sent by:             cc:                                           
                            
                    selvam_at_zamila        Subject:     RE: Compaq Server not releasing 
Memory                       
                    c.com                                                              
                            
                                                                                       
                            
                                                                                       
                            
                    03/17/01                                                           
                            
                    12:10 PM

Are you using vmstat -P to check the free memory or system administration tool (in server)? Similar problem persists for us can anyone give some direction how to go about it.

Thanks

-----Original Message-----

Sent:           Friday, March 16, 2001 9:35 AM
To:        oracledba_at_quickdoc.co.uk; ORACLE-L_at_fatcity.com

Hi,
     We are running application over oracle 815 on Compaq 64 Bit m/c with

Digital Unix. Here what we have observed is that the server is not releasing the memory once occupied.

On server start the free memory available is 85%. This gradually decreases as we fire some sql's. Each sql fired occupies extra 2-3% of memory and does not releases it after completion. As a result after some time the total free memory of server is exhausted. This memory is not released even after shutting down the Oracle instance.

Concept says that oracle uses only the memory allocated to it in SGA for all the queries. Then we are unable to understand why sql queries are hogging the O/S memories.

TIA Lalit...

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