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Event ID: 5 Source: DB2-0
The description for Event ID ( 5 ) in Source ( DB2-0 ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: ADM5500W: DB2 is performing lock escalation. The total number of locks currently held is "<number>", and the target number of locks to hold is "<number>".
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The following test is from the "Productivity Center for Disk and for Replication Problem Determination Guide" from IBM.
Lock escalation can cause problems (including deadlocks), so you should research the cause of this. Usually, the solution to this issue is making your applications commit more frequently (for example, smaller units of work). You can help prevent or perhaps even stop this by updating the database config parameters LOCKLIST and MAXLOCKS.
v Increase the locklist db parameter by a factor of 10.
v Increase the maxlocks db parameter to about 60 (percent).
Locklist is the amount of memory allocated to store active locks. When this gets full, escalation occurs. Maxlocks is the percentage of the locklist memory that any one application can use before escalation occurs. If 60 does not work, you can increase it even more.
To update the database configuration parameter LOCKLIST, run the following command:
- db2 update db cfg for <db name> using LOCKLIST <new value>
To update the database configuration parameter MAXLOCS, run the following command:
- db2 update db cfg for <db name> using MAXLOCS <new value>
If the issue still occurs after you have changed completed the changes, please contact IBM DB2 Consult line for assistance.
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