RE: inbound connection timed out (ORA-3136) RAC

From: Mohammad Rafiq <>
Date: Fri, 4 Jun 2010 19:34:46 -0400
Message-ID: <BAY148-w433E7D0A26F053F7E64298A1D20_at_phx.gbl>

Regardless of RAC or no RAC this error is quite common in 10gr2 databases specially if it is remote database server. I have also seen this behavior on Linux server when server is quite busy for various reasons. SQLNET.INBOUND_CONNECT_TIMEOUT settings is now 10 seconds by default instead of 60 seconds in previous versions (if I remember correctly).  



Date: Fri, 4 Jun 2010 14:54:55 -0700
Subject: Re: inbound connection timed out (ORA-3136) RAC To:;

I would never be one to point fingers- I'm a DBA and do not understand the network infrastructure as well as the Network admin, but as a DBA, I do have to deal with the errors and the database is always guilty until proven innocent. We will and do get these errors unless I put in the following parameters into my sqlnet.ora file: SQLNET.EXPIRE_TIME =10


Cycle the listener and these errors disappear. Now-do I think there is most likely something amiss that I require this in my sqlnet file? Yes, most definitely.. Do I have the time or skills to figure it out? Very questionable... :)  

Kellyn Pedersen

Sr. Database Administrator

I-Behavior Inc.  

"Go away before I replace you with a very small and efficient shell script..."

From: Wolfson Larry - lwolfs <> To: oracle list <> Sent: Fri, June 4, 2010 1:50:33 PM
Subject: inbound connection timed out (ORA-3136) RAC

WARNING: inbound connection timed out (ORA-3136)

We set the INBOUND CONNECTION TIMEOUT=0 in RAC AIX environments, but still get these messages.
Oracle 10.2 & 11.1

Anyone know why this would be happening?


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-- Received on Fri Jun 04 2010 - 18:34:46 CDT

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