RE: ORA-4031 error help.

Avnish

   Glad to see you are getting some excellent suggestions. We run Lawson here. Lawson itself uses the database in a pretty simple manner, so that rules out a lot of stuff, except if you've added customizations of your own. Lawson uses bind variables, so that rules out some suggestions. I notice you run MTS (we don't), so I would recommend you give careful attention to the MTS-related suggestions.

Lawson has a user email list if you haven't found it. Email me directly if you want to discuss any Lawson specifics.

Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com

-----Original Message-----
[mailto:Avnish.Rastogi_at_providence.org]
Sent: Wednesday, October 29, 2003 2:39 PM To: Multiple recipients of list ORACLE-L

Full error message is ....

ORA-04031: unable to allocate 4032 bytes of shared memory ("large pool","unknown object","session heap","frame segment"))

I am already monitoing both shared pool and large pool free memory every 30 minutes and there is no issue with that. As I mentioned below Oracle is not displaying any error message or trace file.

-----Original Message-----
Sent: Wednesday, October 29, 2003 11:55 AM To: Multiple recipients of list ORACLE-L

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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