Pate,
Controlling duhvelopers is not like herding cats, it's more like giving them a
bath!! Heavy body armor required!
Dick Goulet
-----Original Message-----
Sent: Monday, March 31, 2003 2:29 PM
To: Multiple recipients of list ORACLE-L
IIRC, even this release down to S_A_R_S stuff was a myth in earlier
releases. The MALLOC call never really returned the memory to the OS. Of
course, I don't have any earlier releases to prove it now! :)
Pete
"Controlling developers is like herding cats."
Kevin Loney, Oracle DBA Handbook
"Oh no, it's not. It's much harder than that!"
Bruce Pihlamae, long-term Oracle DBA
-----Original Message-----
Sent: Monday, March 31, 2003 10:09 AM
To: Multiple recipients of list ORACLE-L
>From the Manual:
SORT_AREA_SIZE specifies in bytes the maximum amount of memory
Oracle will use for a sort. After the sort is complete, but before the
rows are returned, Oracle releases memory down to the size specified by
the SORT_AREA_RETAINED_SIZE parameter. After the last row is returned,
Oracle releases the remainder of the memory.
Now since the memory is released you won't get a process error, and besides
on a Unix machine it will just trigger the swapper into action which slows
the entire machine down. Now if you want to know if the swapper is active,
check out 'vmstat -s' and look for 'rotations of the clock hand'. Then
check out the system's Uptime. Divide 'rotations of the clock hand' by
uptime. If it's greater then or equal to 1, you've got a problem.
Dick Goulet
-----Original Message-----
Sent: Monday, March 31, 2003 10:59 AM
To: Multiple recipients of list ORACLE-L
If it is a myth where do we find the truth?
Allan
-----Original Message-----
Sent: Monday, March 31, 2003 8:19 AM
To: Multiple recipients of list ORACLE-L
Oracle Myth #1745
"When u set the sort_area_size for a database, it will
allocate that much memory PER USER for any sort
operation being performed on the database"
--- "SARKAR, Samir"
<[EMAIL PROTECTED]> wrote: >
Arvind,
>
> When u set the sort_area_size for a database, it
> will allocate that much
> memory PER USER
> for any sort operation being performed on the
> database. In practice, it
> means that if u allocate
> too high a value for the sort_area_size and multiple
> users are performing
> multiple sorts, the Unix
> system may run out of memory and Oracle will return
> u a process memory
> error.
>
> For eg. if u have ur sort_area_size as 100MB and u
> have 10 users performing
> sort operations
> on the database, Oracle will take up 100*10 MB
> memory. This might degrade ur
> system performance.
>
> Samir
>
> Samir Sarkar
> Oracle DBA
> SchlumbergerSema
> Email : [EMAIL PROTECTED]
> Phone : +44 (0) 115 - 957 6028
> EPABX : +44 (0) 115 - 957 6418 Ext. 76028
> Fax : +44 (0) 115 - 957 6018
>
>
> -----Original Message-----
> Sent: 31 March 2003 11:04
> To: Multiple recipients of list ORACLE-L
>
>
> hello all,
>
> how does increasing the value of SORT_AREA_SIZE
> affect the unix system
> perfomance.
>
>
> Thanks
> Arvind
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.net
> --
> Author: Arvind Kumar
> INET: [EMAIL PROTECTED]
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=====
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"GIVE a man a fish and he will eat for a day. But TEACH him how to fish,
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