Statspack Reports
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Statspack Reports






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Statspack Reports Document Transcript

  • 1. Anar Godajev Statspack Reports /* When installing the Statspack package, you can either change to theORACLE_HOME/rdbms/admin directory, or fully specify theORACLE_HOME/rdbms/admin DIRECTORY WHEN calling the installation script, SPCREATE.SQL. */ -- install statspack @?/rdbms/ADMIN/spcreate /* Enter appropriate information when prompted for the PERFSTAT user's password, default tablespace, and temporary tablespace. The SPCREATE.SQL install script runs the following scripts automatically: */ /* SPCUSR.SQL: Creates the user and grants privileges SPCTAB.SQL: Creates the tables SPCPKG.SQL: Creates the package */ -- To install without prompting SQL> CONNECT / AS SYSDBA SQL> define default_tablespace='TOOLS' SQL> define temporary_tablespace='TEMP' SQL> define perfstat_password='my_perfstat_password' SQL>@?/rdbms/ADMIN/spcreate /* -- automatic collection of statistics oracle_home/rdbms/admin/spauto.sql */ -- executing statspack SQL> CONNECT perfstat/my_perfstat_password SQL> EXECUTE statspack.snap; -- For better performance analysis, set the initialization parameter TIMED_STATISTICS to TRUE. -- Statspack will then include important timing information in the data it collects. -- create statspack report SQL> CONNECT perfstat/my_perfstat_password SQL>@?/rdbms/ADMIN/spreport -- statspack in a pl/sql block DECLARE variablesnap NUMBER; BEGIN snap:= statspack.snap; dbms_output.put_line(snap); END;
  • 2. Anar Godajev -- automaticstatspac -- A sample script on how to do this is supplied in SPAUTO.SQL -- create statspack report without prompt SQL> CONNECT perfstat/my_perfstat_password SQL> define begin_snap=1 SQL> define end_snap=2 SQL> define report_name=batch_run SQL>@?/rdbms/ADMIN/spreport /* When you examine the instance report, you often find high-load SQL statements that you want to examine more closely. The SQL report, SPREPSQL.SQL, displays statistics, the complete SQL text, and (if a level six snapshot has been taken), information on any SQL plan(s) associated with that statement. */ SQL> CONNECT perfstat/my_perfstat_password Connected. SQL>@?/rdbms/ADMIN/sprepsql -- truncate all statspack data SQL> CONNECT perfstat/my_perfstat_password SQL>@?/rdbms/ADMIN/sptrunc -- remove statspack SQL> CONNECT / AS SYSDBA SQL>@?/rdbms/ADMIN/spdrop /* SPDTAB.SQL - drops tables and public synonyms SPDUSR.SQL - drops the user */ -- Purge unnecessary data by using the SPPURGE.SQL script SQL> CONNECT perfstat/my_perfstat_password SQL> SET TRANSACTION USE ROLLBACK SEGMENT rbig; SQL>@?/rdbms/admin/spurge SQL> CONNECT perfstat/my_perfstat_password SQL> DEFINE losnapid=1 SQL> DEFINE hisnapid=2 SQL>@?/rdbms/admin/spurge -- snap parameters EXECUTE STATSPACK.SNAP(i_ucomment=>'this is a temporary commment'); EXECUTE STATSPACK.MODIFY_STATSPACK_PARAMETER(i_ucomment=>'this is a commment that is saved'); EXECUTE STATSPACK.SNAP(i_snap_level=>10, i_modify_parameter=>'true'); EXECUTE STATSPACK.SNAP(i_snap_level=>6); Levels Levels Levels Levels >= >= >= >= 0 5 6 7 General Performance STATISTICS Additional Data: SQL Statements Additional Data: SQL Plans AND SQL PLAN Usage Additional data: SEGMENT LEVEL STATISTICS
  • 3. Anar Godajev Levels >= 10 Additional STATISTICS: Parent AND Child Latches