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Performance problem
Dear All,
Our users are complaing about performce problem reagrding some reports then i check Hit ratios of main buffer pool (shared pool,database buffer,library cache...etc) , but Buffer cache Hit
ration is around 61.15% then i have just enable Automatic shared memory management by increasing SGA_TARGET size & STATISTICS_LEVEL to typical after doing this Data buffer Hit ration is 49.48% even i rebuild all indexes of the schema whose facing performance problem , so please some one suggets me to increase the peromance of the database. quick response
will be higly appreciated. thank
product  racle10g on windows server 2003
Best Regards
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In terms of performance troubleshooting we have moved long ago from "hit ratios" to "wait events".
Check on AWR how ten top wait events compare - select the same timeframe before and after users started to complain like: last Friday from 8am to 10am vs. two weeks ago Friday from 8am to 10am. Use a timeframe/day-of-the-week that is relevant for your environment.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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