Re: TNS-12531 listener trouble on Windows 2003

From: Gerard H. Pille <ghp_at_skynet.be>
Date: Thu, 06 Jan 2011 20:28:02 +0100
Message-ID: <4d2617c2$0$14246$ba620e4c_at_news.skynet.be>



HansP wrote:
> This is happening at a 2 node windows 2003 rac with 96G ram (free ram
> about 70G)
> Release of grid infrastructure is 11.2
> Database 10.2.0.5.
>
> When too many users connect (little fewer than 150) all listeners
> report then 12531 error and become unresponsive afterwards
>
> Thu Jan 06 13:32:43 2011
> No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)
> (HOST=x.x.x.x)(PORT=1521)))
> 06-JAN-2011 13:32:43 * service_died * LsnrAgt * 12537
> 06-JAN-2011 13:32:43 * 12531
> TNS-12531: TNS:cannot allocate memory
>
> lsnrctl status gives protocol adapter error
> Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)
> (KEY=LISTENER_SCAN2)))
> TNS-12560: TNS:protocol adapter error
>
>
> We have increased the desktop heap size to 1M.
>
> Any clues or directions?
>
> regards HansP

The only working solution would be switching to Linux.

But it is clear that the Listener doesn't find enough memory to start an oracle server process.   If "desktop heap" is needed for that purpose, then 1Mb is not a lot, is it? 1Mb / 150 is not much for a server process. Does the listener or do the server processes have access to that "desktop heap"?

Or is your OS running against the 4Gb limit? I quote Áicro$oft: "Limits on physical memory for 32-bit platforms also depend on the Physical Address Extension (PAE), which allows 32-bit Windows systems to use more than 4 GB of physical memory." Received on Thu Jan 06 2011 - 13:28:02 CST

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