Oracle-L: Re: ORA-4031 error help.

From: Jeremiah Wilton <jwilton_at_speakeasy.net>
Date: Wed, 29 Oct 2003 11:54:32 -0800
Message-ID: <F001.005D4F5D.20031029115432@fatcity.com>

Well, you neet to check the full error, because otherwise there's no way to tell if you are running low on shared or large pool.

The view that shows space usage in both places in v$sgastat. I suggest you start looking there. Maybe your third-party application doesn't use bind variables and is bloating the shared pool. You could verify this by observing that the sqlarea component of the shared pool is very large as seen in v$sgastat. If this is the case then you might consider testing with cursor_sharing=force.

You could also count different versions of similar SQL from the application by grouping sql_text in v$sqlarea by the first 30 characters or so. This assumes your problem is shared pool sqlarea bloat. You could just be runnning out of space for MTS session heaps in the large pool. You have to look at v$sgastat first.

--
Jeremiah Wilton
http://www.speakeasy.net/~jwilton

On Wed, 29 Oct 2003, Avnish.Rastogi_at_providence.org wrote:



> Hello List, Need some help in resolving ORA-4031 error message. We

> are using Lawson and for last few days users are getting ORA-4031

> error 2-3 times a day in LAWSON log files but there is no error

> message in alert log file or any trace file. Both shared pool and

> large pool is set to 1GB. Below is the current init.ora file. We are

> on Oracle 9202 and AIX 5.1, using MTS.

>

> # Miscellaneous

> COMPATIBLE=9.2.0

> DB_NAME=LAWSON

> DB_FILES=1500

> GLOBAL_NAMES=TRUE

> DB_BLOCK_SIZE=8192

> DB_CACHE_SIZE=1792M

> DB_KEEP_CACHE_SIZE=16M

> LARGE_POOL_SIZE=1024M

> SHARED_POOL_SIZE=1024M

> SGA_MAX_SIZE = 5G

> DB_FILE_MULTIBLOCK_READ_COUNT=8

> CONTROL_FILE_RECORD_KEEP_TIME=45

> CURSOR_SHARING=SIMILAR

> OPEN_CURSORS=750 # From Lawson--Raised from 500 to 750 10/24/03

> BACKGROUND_DUMP_DEST=/appl/lawdb/oracle/admin/LAWSON/bdump

> CORE_DUMP_DEST=/appl/lawdb/oracle/admin/LAWSON/cdump

> USER_DUMP_DEST=/appl/lawdb/oracle/admin/LAWSON/udump

> TIMED_STATISTICS=TRUE

> CONTROL_FILES=("/appl/lawdb/oracle/data/db01/LAWSON/contrl_LAWSON_01.ctl",

>                "/appl/lawdb/oracle/data/db02/LAWSON/contrl_LAWSON_02.ctl",

>                "/appl/lawdb/oracle/data/db03/LAWSON/contrl_LAWSON_03.ctl",

>                "/appl/lawdb/oracle/data/db04/LAWSON/contrl_LAWSON_04.ctl",

>                "/appl/lawdb/oracle/data/db05/LAWSON/contrl_LAWSON_05.ctl")

>

> # Archive

> LOG_ARCHIVE_DEST=/appl/lawdb/oracle/archive_logs/LAWSON/

> LOG_ARCHIVE_DUPLEX_DEST=/appl/lawdb/oracle/archive_logs_2/LAWSON/

> LOG_ARCHIVE_FORMAT="ARC_LAWSON_%S.%T"

> LOG_ARCHIVE_START=TRUE

> # LOG_ARCHIVE_TRACE = 1

>

> # Distributed, Replication and Snapshot

> DB_DOMAIN=PHSOR.ORG

>

> # Pools

> JAVA_POOL_SIZE=0

>

> # Processes and Sessions

> # PROCESSES=800 Increased value per vendor JMK 6/09/03

> PROCESSES=1000

> SESSIONS=1140

> ENQUEUE_RESOURCES=8000

> TRANSACTION_AUDITING=FALSE

> REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE

> FAST_START_MTTR_TARGET=1200

> SORT_AREA_SIZE=0

> HASH_AREA_SIZE=0

> UNDO_MANAGEMENT=AUTO

> UNDO_TABLESPACE=undo

> UNDO_RETENTION = 10800

> PGA_AGGREGATE_TARGET=1G

> WORKAREA_SIZE_POLICY = AUTO

> JOB_QUEUE_PROCESSES = 10

> LOG_BUFFER = 8192000    # To reduce 'log file parallel write' wait event in v$system_event

> CURSOR_SPACE_FOR_TIME   = TRUE

> SERVICE_NAMES=lawson_ax3202a

> LOCAL_LISTENER=lawson_ax3202a

> # Network Registration

> INSTANCE_NAME=LAWSON

> DISK_ASYNCH_IO = FALSE

> BACKUP_TAPE_IO_SLAVES=TRUE

> PARALLEL_THREADS_PER_CPU = 6

> PARALLEL_MAX_SERVERS = 6

> PARALLEL_MIN_SERVERS = 1

> DISPATCHERS="(ADDRESS=(PROTOCOL=TCP)(HOST=provicon)(PORT=5000))(DISPATCHERS=1)"

> MAX_DISPATCHERS = 3

> SHARED_SERVERS = 10

> MAX_SHARED_SERVERS = 50


-- 
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-- 
Author: Jeremiah Wilton
  INET: jwilton_at_speakeasy.net

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Received on Wed Oct 29 2003 - 13:54:32 CST