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
>
>
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