RE: ORA-03113 end of file on communication channel

It's true, and just as soon as Mladen can work out why I'm responsible for world hunger, I'll have that as my fault as well. :)  

Pete  

"Controlling developers is like herding cats." Kevin Loney, Oracle DBA Handbook  

"Oh no, it's not. It's much harder than that!" Bruce Pihlamae, long-term Oracle DBA

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Mladen Gogala Sent: Wednesday, 31 March 2004 7:19 AM
To: oracle-l_at_freelists.org
Subject: Re: ORA-03113 end of file on communication channel

Well, as you know, "the end of communication rope" happens when the server process dies. There should be an accompanying error in the alert.log file. Usually, those errors are ORA-7445 and ORA-600, which give people much craved opportunity to use metalink. ORA-7445 means that there was an exception in the server process. The only case when it can legitimately happen, without laying the blame on Pete Sharman, is when the address space is not large enough. Typically, OS will let users to have process sizes of about 2GB, and will terminate anything that exceeds the boundary. OS parameter for that purpose defines the maximum size of page tables per segment or per process. You can suspect the VM size if the address at which the problem occurs is extremely large. If, on the other hand, the address is very small, <= 4k, then the program tried to access the page 0, which has deliberately been marked "no access", in order to catch the attempts of dereferencing the NULL pointer. If the address is close to 0, oracle tried to use NULL pointer, and that is Pete's fault. ORA-600 is his fault, too.

On 03/30/2004 03:33:06 PM, david wendelken wrote:
> Forgot to add this bit of info:
>
> Have also gotten this error in very secure environments, where the network times out access to oracle sessions on remote machines fairly quickly. In that case, it legitimately is an end of communcation channel.
>
>
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-- 
Mladen Gogala
Oracle DBA
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