What is AWR snapshot in Oracle?

What is AWR snapshot in Oracle?

AWR Snapshot Reports Oracle provides reports that you can run to analyze the data in the AWR. These reports are much like the statspack reports prior to Oracle Database 10g. There are two reports: awrrpt. sql and awrrpti. sql, which are available in the directory $ORACLE_HOME/rdbms/admin.

What is STATSPACK in Oracle?

Statspack is a performance tuning tool provided by Oracle with the Oracle9i database distribution. With minimal effort, it can be installed on any Oracle9i database to quickly gather detailed analysis of the performance of that database instance.

What is snapshot in Oracle with example?

A snapshot is a staged copy of data in a Data Store that is used in one or more processes. The Data Store of the source data (from a list of connected data stores registered on the OEDQ host) The table or Data Interface to snapshot (or you may specify SQL to snapshot a new Data Interface)

What is AWR miner?

A tool to mine and graph the AWR Repository of an Oracle 10.1+ database for performance data.

How do you use Statspack?

To install Statspack, perform the following:

1. Start SQL*Plus.
2. Connect as a user with SYSDBA privilege. For example: SQL> CONNECT / AS SYSDBA.
3. Run the SPCREATE. SQL script.
4. Enter appropriate information when prompted for the PERFSTAT user’s password, default tablespace, and temporary tablespace.

What is the difference between snapshot and view?

snapshot is an old and deprecated term for a materialized view . They’re exactly the same thing, snapshot is just an older term. A view is a stored query. It consumes (effectively) no space, just the space required to store the text of the query in the data dictionary.

What is snapshot SQL?

Snapshot is a recent copy of the table from the database or a subset of rows/columns of a table. The SQL statement that creates and subsequently maintains a snapshot normally reads data from the database residing server. A snapshot is created on the destination system with the create snapshot SQL command.

Where is Oracle AWR report?

To generate an AWR Compare Periods report for Oracle RAC on the local database instance using the command-line interface:

1. At the SQL prompt, enter: @$ORACLE_HOME/rdbms/admin/awrgdrpt.sql.
2. Specify whether you want an HTML or a text report: Enter value for report_type: html.

What AWR report contains?

The AWR provides a set of tables into which snapshots of system statistics are stored. Generally these snapshots are taken on an hourly basis and include wait interface statistics, top SQL, memory, and I/O information that is cumulative in nature up to the time of the capture.

What is the difference between statspack and AWR?

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 automated workload repository (AWR)?

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.

Can statspack be used for time series data analysis?

Oracle SE shops routinely use STATSPACK for time-series data analysis with great results. STATSPACK also can be used in-lieu of the 12c AR warehouse features in 12c: There are two Oracle Press books on STATSPACK, one for 8i (2001) and one for 9i (2002)

Is there a book on statspack For 12C?

There are two Oracle Press books on STATSPACK, one for 8i (2001) and one for 9i (2002) However, remember that STATSPACK remains alive and well in 12c. The table names are deliberately similar, making it easy to convert AWR scripts to STATSPACK.