eFix (APAR): PQ61342 Status: E-Fix Release: WebSphere 4.0.3, 4.0.4 Operating System: N/A CMVC defect: PQ61342 Date: 30/07/02 Title: PERFORMANCE IMPROVEMENT FOR TRANSACTION LOGGING Abstract: Improvements to be made to transaction logging performance Description/symptom of problem: This fix reduces the frequency with which the transaction log file is keypointed. Before, checkpointing occurred after 50 transactions, regardless of the size of the file. The fix has changed this so checkpointing occurs when the transaction log is 85% full. Directions to apply efix: 1) Create temporary "efix" directory to store the jar file: AIX: /tmp/WebSphere/efix Solaris/Linux: /tmp/WebSphere/efix Windows: c:\temp\WebSphere\efix 2) Copy jar file to the directory 3) Shutdown WebSphere 4) Run the jar file with the following command answering questions/prompts as they appear: java -jar PQ61342_eFix.jar 5) Restart WebSphere 6) The temp directory may be removed but the jar file should be saved. Do not remove any files created and stored in the /WebSphere/AppServer/efix/PQ61342 directories. These files are required if an efix is to be removed. Directions to remove an efix: NOTE: EFIXES MUST BE REMOVED IN THE ORDER THEY WERE APPLIED. DO NOT REMOVE AN EFIX UNLESS ALL EFIXES APPLIED AFTER IT HAVE FIRST BEEN REMOVED. YOU MAY REAPPLY ANY REMOVED EFIX. Example: If your system has efix1, efix2, and efix3 applied in that order and efix2 is to be removed, efix3 must be removed first, efix2 removed, and efix3 re-applied. 1) Change directory to the efix location (/WebSphere/AppServer/efix/PQ61342). 2) Shutdown WebSphere 3) Run the backup jar file with the following command: java -jar PQ61342_eFix_backup.jar 4) Restart WebSphere Directions to re-apply an efix: Follow the instructions for applying an efix. If the backup files still exist (from the previous efix application), you will be prompted to overwrite. Answer "yes" at the overwrite prompts. Additional Information: ------------------------------------------------------------------