RE: rman failure ORA-04030 indicates memory issue

From: <Paula_Stankus_at_doh.state.fl.us>
Date: Tue, 5 Oct 2004 04:50:53 -0400
Message-ID: <E518A02B320C8D4E97D99A8C546480217B89A1@dohsmailhq01.doh.ad.state.fl.us>

Interesting note:

Same backup process, same way of making the connection, same tnsnames.ora, sqlnet.ora but backing up to tape versus disk I get the following after a successful connection to the target and successful allocation of 4 channels:

RMAN-12001: could not open channel t5
RMAN-10008: could not create channel context
RMAN-10003: unable to connect to target database using connect string

"user/pass_at_fully qualified hostname"
ORA-12500: TNS:listener failed to start a dedicated server process

AND THE CONNECTION TO THTE TARGET WAS ALREADY MADE - IT IS IN ALLOCATING CHANNEL 5 THAT THERE IS AN ERROR! -----Original Message-----
From: Stankus, Paula G=20
Sent: Tuesday, October 05, 2004 4:43 AM
To: 'tim_at_sagelogix.com'; Oracle-L_at_Freelists. Org (E-mail) Subject: rman failure ORA-04030 indicates memory issue

Rman fails with:

I notice that=20
A. A number of batch processes were added to database and likely using a good deal of "sort" area as large batch processes often do B. Volume of data added last night.
C. This error occurred along with another error:

ORA-12540: TNS:internal limit restriction exceeded

ORA-04030: out of process memory when trying to allocate 524824 bytes (pga heap,KSFQ Buffers)

I looked at TOP on Solaris while running the job that failed with ORA-04030 and out of 8 Gb, 4Gb of RAM were still showing as available.

I decreased the filesperset in rman from 10 to 4 and am concerned with the degradation of runtime for my backup processes.

The pga_aggregate_target is set at pga_aggregate_target=3D1610612736 sga_max_size=3D2147483648
processes=3D150.

I plan to look at the pga_aggregate_target related views. I also noticed in the alert.log the following:

ORA-07445: exception encountered: core dump [0000000101D51DF0] [SIGBUS] [Object
specific hardware error] [0xFFFFFFFF7CA9FE90] [] []

Along with a trace file with a specific SQL statement. =20

Question: How appropriate/inappropriate are the pga_aggregate_target, sga_max_size given 8Gb RAM and that this is the only database on the system?

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Received on Tue Oct 05 2004 - 03:46:23 CDT