How do I run Statspack report in Oracle 9i?
Using Statspack Report in oracle 9i
- Create PERFSTAT Tablespace:
- To Install statspack:
- To take a snapshot manually:
- Adjusting the STATSPACK Collection Level:
- To schedule an hourly snapshot:
- To Create statspack report:
- To delete snapshots:
- To list all generated snapshots:
What is the use of Statspack in Oracle?
The Statspack package is a set of SQL, PL/SQL, and SQL*Plus scripts that allow the collection, automation, storage, and viewing of performance data. Statspack stores the performance statistics permanently in Oracle tables, which can later be used for reporting and analysis.
How do I enable Statspack?
Installing the Statspack
- Navigate to the $ORACLE_HOME/rdbms/admin directory as follows:
- Start the Statspack install script, spcreate.sql , as follows:
- Enter a password for the PERFSTAT user when prompted.
- Enter the default tablespace (tools) for the PERFSTAT user when prompted.
What are statistics in Oracle database?
Optimizer statistics are a collection of data that describe the database, and the objects in the database. These statistics are used by the Optimizer to choose the best execution plan for each SQL statement. Statistics are stored in the data dictionary, and can be accessed using data dictionary views such as.
What do Statspack reports look for?
In a nutshell, the most important areas to read in any STATSPACK report are the top-5 timed events and the statistics for the major database events. The I/O statistics are also very useful.
What is Statspack report?
Statspack is a set of performance monitoring, diagnosis and reporting utility provided by Oracle. Statspack provides improved UTLBSTAT/UTLESTAT functionality, as it’s successor, though the old BSTAT/ESTAT scripts are still available.
What is the difference between Statspack and AWR in Oracle?
Answer: STATSPACK was the precursor to AWR, originally a free tool for performing time-series analysis. Starting in Oracle 10g an extra-cost version of STATSPACK called Automated workload Repository (AWR) was created and bundled into the Oracle diagnostic pack, an extra-cost feature.
What is sample size in Oracle statistics?
Since Oracle only has to gather histograms, it picks the fastest method possible, which is to sample. The default sampling size for histogram creation is approximately 5,500 non-null values for the column.
What are stats in database?
Statistics for query optimization are binary large objects (BLOBs) that contain statistical information about the distribution of values in one or more columns of a table or indexed view. The Query Optimizer uses these statistics to estimate the cardinality, or number of rows, in the query result.
How do you analyze Statspack?
Analyzing a Statspack Report. Wait for Multi-block read of a table or index (full scan): tune the code and/or cache small tables. Wait for single block read of a table or index. Indicates many index reads: tune the code (especially joins).
How do you read Statspack?
How do I run Statspack report?
INSTALLING STATSPACK Run the installation script using SQL*Plus from within the $ORACLE_HOME/rdbms/admin directory or the equivalent on your system: SQL> connect / as sysdba SQL> @spcreate This will create a database user PERFSTAT and the Statpack schema. Note that the script must be run from SQL*Plus.
Where can I find the sprepsql report in Oracle?
The report is located in the rdbms/admindirectory of the Oracle home. Note: In an Oracle Real Application Clusters environment, you must connect to the instance on which you want to report. The SPREPSQL.SQLreport prompts you for the following:
What is sppurge in Oracle 9i?
Oracle9i SQL Reference When you run SPPURGE.SQL, it displays the instance to which you are connected and the available snapshots. It then prompts you for the low snap ID and high snap ID. All snapshots that fall within this range are purged.
What is Oracle 9i?
Oracle 9i is a version of the Oracle Database. The i stands for “Internet” to indicate that 9i is “Internet ready”. Also see Oracle 10g and Oracle 11g .
How to run the report in batch mode using sprepsql?
To use this name, press to continue, otherwise enter an alternative. Enter value for report_name: Using the report name sp_39_40_1988538571 The report scrolls past and is also written to the file you specified. For example: sp_39_40_1988538571.lis The SPREPSQL.SQLscript can run the SQL report in batch mode.