RE: Priority Paging on Solaris

Hi,

        I spoke to Sun support in detail to find out about this parameter.

I'm on Solaris 2.6, generic patch Generic_105181-16.

priority_paging is default in solaris 2.7 and up but not in 2.6. It is recommended for virtually any solaris 2.6 system since I'm told it may have benifits but has no drawbacks. Sun did not mention any performance, just that the OS handles memory 'better' under certain circumstances. You must be on generic patch at least Generic_105181-09 (which I guess anyone should be on because it is quite old).

Regards,
Mike.

-----Original Message-----
Sent: 09 February 2001 21:51
To: Multiple recipients of list ORACLE-L

Yes and Yes.

Also, the document skips over some other parameters you should set in addition to priority_paging=1

Check
out
http://www.unixinsider.com/unixinsideronline/swol-07-1999/swol-07-filesystem 3_p.html

which lists these also:

set fastscan=131072
set handspreadpages=131072
set maxpgio=65536

Finally, please note that you didn't state what version of Solaris and what patch level you're at.

We're at 2.6 and have the necessary kernel patches.

J

p.s. As to how much performance increase, well, we only had the priority_paging =1 enabled up to this point, the other parameters go in on Sunday. if you email me next week I'll try and get you an update.

At 01:40 PM 2/9/01 -0800, Steve Orr wrote:
>Has anyone enabled priority paging on Solaris and did you experience any
>performance gains as a result? (10-300% performance gains possible
according
>to Sun.) For a description here's a link:
>
>http://www.sun.com/sun-on-net/performance/priority_paging.html
>
>Comments? Recommendations?
>
>
>Steve Orr
>
>
>--------
>Think you know someone who can answer the above question? Forward it to
them!
>to unsubscribe, send a blank email to oracledba-unsubscribe_at_LAZYDBA.com
>to subscribe send a blank email to oracledba-subscribe_at_LAZYDBA.com
>Visit the list archive: http://www.LAZYDBA.com/odbareadmail.pl

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jay Weinshenker
  INET: jweinshe_at_concentric.net

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jenner Mike
  INET: M.Jenner_at_southampton.gov.uk

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).