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I am having a 2003 R2 Server with IIS and mysql running. My problem is, that the server stops responding on the net each 3 days. When I log on I get an error, that I can't log on (0x000012d) The only thing I can do: restart

All logs are clean. Nothing special in the log. I can see only services logging that no memory is available.

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I doubt that the master browser errors are directly related to the problem. Run perfmon and check the Memory|Pool Nonpaged Bytes counter. The following articles relate to IIS on an Exchange server but they are related to IIS problems when the Memory|Pool Nonpaged Bytes usage is too high (pool exhaustion). I couldn't find the articles specific to IIS but these should help:

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For what you using this server what you have there ? how many ram have and swap ? What is writing on logs ?

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logs are clean - nothing special in. – user62138 Dec 1 '10 at 13:18
4 Gig RAM - standard SWAP from Windows – user62138 Dec 1 '10 at 13:18
All i can see is, that first an event "master browser not found" appears. After that it takes about 20 Minutes an the System is unusable. I think that log entry is in advance of the unavailable RAM. We logged the memory usage (paging) with perfmon. 10 minutes before the crash no more pages a processed. Perfmom shows no more action with paged memory. Than the system dies ... – user62138 Dec 1 '10 at 13:37

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