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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Windows NT and Virtual Memory
Thanks Jack. I am aware of this limitation under NT. But what I dont have an answer for, is why it never happened on the old server. As per business, there's no drastic increase in the number of connections. Previously, there used to be about 300-350 connections, but on the new server, it wont go past 220.
Dave suggested a reboot of the box, but then this is a soon to be 24*7 production (ON NT !!!). And Michael suggested using MTS. We did put in the same recommendations. Also, the article on Metalink talks about means to decrease the virtual memory usage, but then business always turns around, and pose the same question again? WHY NOW? They need an explanation.
And as I am still musing over this, and looking forward for the clock to strike 5, my i-tar's been bouncing between severity levels 3 to 1 to 2, and from the database group to the OS to the Network group. Hoping this problem will resolve itself after 42 days ;-)
Thanks
Raj
"Jack C.
Applewhite" To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
<japplewhite_at_inetp cc:
rofit.com> Subject: RE: Windows NT and Virtual Memory
Sent by:
root_at_fatcity.com
March 22, 2002
11:24 AM
Please respond to
ORACLE-L
Raj,
Oracle can only use 2GB of RAM for all its processes under NT or Win2k unless you're using NT Enterprise Edition or Win2k Advanced Server and you set an NT / Win2k parameter to allow it to use up to 3GB or (yet another OS setup) 4GB and more.
Check out the Windows-specific docs for info. and references to papers on the MS site. I went through that investigation a while back, but the exact details have left my brain cell. ;-)
Jack
-----Original Message-----
Rajesh.Rao_at_jpmchase.com
Sent: Friday, March 22, 2002 9:59 AM
To: Multiple recipients of list ORACLE-L
Operating System: Windows NT 4.0 with SP 6a Oracle Version : 8.1.7
We recently migrated an Oracle database from one Windoze NT box to another. The NT administrators claim that the NT boxes are indentical in all respects, except that the old one had Service Pack 4. We have recreated the database on the new box with exactly indentical initialization paremeters, file sizes, extent sizes, et all.
The database gleefully accepts all connections upto about 220 users
(V$license, v$session). When the 221st user tries to logon, the TNS-12500:
Unable to start a dedicated server process is thrown. After all the
troubleshooting (Connect timeouts, Disable otracing, tracing client), we
discovered that as soon as the Virtual memory approaches 1.7Gb, this
problem starts happening. I read articles on Metalink which suggested that
this is a limitation with Windows NT, and suggests some recommendation to
delay this problem.
So, we recommended the same to business. But now they wish to know why these errors never occured in the old NT server. And to further worsen matters, the old server has been cleaned up. So, I have no way of going back and Checking.
Has anyone else on this list encountered the same problem? Possible workarounds, if any?
Thanks
Raj
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jack C. Applewhite INET: japplewhite_at_inetprofit.com 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-LReceived on Fri Mar 22 2002 - 11:13:21 CST
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also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: Rajesh.Rao_at_jpmchase.com 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
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