traceOracle 10053 Trace: Unraveling Performance Mysteries（oracle10053）
For database performance tuning, Oracle database administrators often turn to the Oracle 10053 trace to see what is slowing down system performance. This article will explain what the Oracle 10053 trace is, how to use it to diagnose performance problems, and provide some tips to get the most out of the trace.
The Oracle 10053 trace is an Oracle-specific trace that captures data about database operations. It is generated when a database session issues an Oracle database statement and captures information such as the parsed SQL statement, the number of executions, the elapsed time of execution, and the resource consumption of each execution. This information collected can be used to troubleshoot performance problems in Oracle databases.
When performance problems occur, the trace can be enabled via the Oracle database parameter TIMED_STATISTICS set to TRUE. After collecting the trace files, the database administrator can use the Oracle TKProf utility to review the trace contents, analyze the output and determine which SQL statements are causing the performance problem. The level of detail provided by the Oracle 10053 trace helps to identify causes of the performance problems.
For example, a database administrator may notice that the execution time of a SQL statement is too high. By inspecting the Oracle 10053 trace, the administrator can see the elapsed time, the number of executions, and the resource consumption associated with each execution, allowing them to identify angles to focus tuning efforts.
The Oracle TKProf utility, when combined with the Oracle 10053 trace, can be very helpful in fixing performance problems. By generating execution plans, the Oracle TKProf utility can identify poorly performing SQL statements and suggest alternatives. Additionally, the Oracle TKProf utility can provide parameter adjustments and index improvements, as well as show usage of cache tables to improve SQL performance.
In addition to the Oracle 10053 trace, there are other performance diagnostic techniques a database administrator can use to tune the database and ensure optimal performance. For example, using the Oracle AWR and ADDM reports to generate system-wide metrics and then comparing the data collected helps identify performance trends and allows tuning efforts to be directed toward the largest performance gains.
In conclusion, the Oracle 10053 trace is an invaluable tool for diagnosing and tuning Oracle performance. By inspecting the trace files, database administrators can determine where performance bottlenecks are occurring, and then use the Oracle TKProf utility to suggest parameter adjustments and index improvements for maximum efficiency. Database administrators should use this trace in conjunction with other performance diagnostic techniques such as the Oracle AWR and ADDM reports to get the most out of their database performance tuning efforts.
