You can find the top 5 wait events in the AWR reports. %1-3 values are not big problem for following wait events. Operating System tools show very high utilization or saturation of disks used for storage of database files. Find top CPU Consuming Session or SQLs query in Oracle If two or more sessions request the same information, the first session will read the data into the buffer cache while other sessions wait. Descriptions of Wait Events Information about wait events is displayed in three dynamic performance views: V$SESSION_WAIT displays the events for which sessions have just completed waiting or are currently waiting. SQL> create or replace procedure test1 is. Statements will disappear from the cache over time, so it might be no good trying to diagnose last night's batch job when you roll into work at midday. Step by Step: How to troubleshoot a slow running query in Oracle DBA Queries for Checking Concurrent Requests and Programs Now Oracle is allocating 66,048 message buffers, a large number, indeed. The techniques described here can be followed when: AWR (or Statspack) reports show I/O wait events in the "Top 5 Wait/Timed Events" section. Sometime gc current block 3-way wait event is appearing in TOP-5 wait event analysis in AWR reports because of missing of index on foreign key columns. Oracle tuning tips Tip 1 - Monitor Wait Times. I have been looking in past Oracle-L posts, Google, Oracle FAQ, OTN, Metalink, Oracle manuals, etc. Number of Sessions Waiting On A Particular Wait EventSELECT count(*), event FROM v$session_wait WHERE wait_time = 0 AND event NOT IN ('smon timer','pipe get . SQL Performance Tuning: Top 5 Ways to Find Slow Queries Your query says seconds in wait is 0. Oracle Wait Events Top 10 CPU consuming Session in Oracle col program form a30 heading "Program" col CPUMins form 99990 heading "CPU in Mins" select rownum as rank, a. PDF <Insert Picture Here> - Oracle
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