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PostgreSQL Invalid Page and Checksum Verification Failed

At the Seattle PostgreSQL User Group meetup this past Tuesday, we got onto the topic of invalid pages in PostgreSQL. It was a fun discussion and it made me realize that it’d be worth writing down a bunch of the stuff we talked about – it might be interesting to a few more people too!

Invalid Page In Block

You see an error message that looks like this:

PostgreSQL Invalid Page and Checksum Verification Failed

At the Seattle PostgreSQL User Group meetup this past Tuesday, we got onto the topic of invalid pages in PostgreSQL. It was a fun discussion and it made me realize that it’d be worth writing down a bunch of the stuff we talked about – it might be interesting to a few more people too!

Invalid Page In Block

You see an error message that looks like this:

PostgreSQL Invalid Page and Checksum Verification Failed

At the Seattle PostgreSQL User Group meetup this past Tuesday, we got onto the topic of invalid pages in PostgreSQL. It was a fun discussion and it made me realize that it’d be worth writing down a bunch of the stuff we talked about – it might be interesting to a few more people too!

Invalid Page In Block

You see an error message that looks like this:

Mystats utility

A variation on Jonathan Lewis's SNAP_MY_STATS package to report the resource consumption of a unit of work between two snapshots. Designed to work under constrained developer environments, this version has enhancements such as time model statistics and the option to report on specific statistics. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a free-standing SQL*Plus script (i.e. no installation/database objects needed). June 2007 (updated November 2015)

Mystats utility

A variation on Jonathan Lewis's SNAP_MY_STATS package to report the resource consumption of a unit of work between two snapshots. Designed to work under constrained developer environments, this version has enhancements such as time model statistics and the option to report on specific statistics. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a free-standing SQL*Plus script (i.e. no installation/database objects needed). June 2007 (updated October 2011)

Runstats utility

A variation on Tom Kyte's invaluable RUNSTATS utility that compares the resource consumption of two alternative units of work. Designed to work under constrained developer environments and builds on the original with enhancements such as "pause and resume" functionality, time model statistics and the option to report on specific statistics. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a free-standing SQL*Plus script (i.e. no installation/database objects needed). January 2007 (updated October 2011)

Xplan utility

A utility to add parent ID and execution order information to plans reported by DBMS_XPLAN. XPlan includes DISPLAY, DISPLAY_CURSOR and DISPLAY_AWR functionality for use in exactly the same way as the DBMS_XPLAN equivalents. Supports versions from 10g onwards. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a collection of three free-standing SQL*Plus scripts (i.e. no installation/database objects needed). January 2009 (updated October 2011)

Runstats utility

A variation on Tom Kyte's invaluable RUNSTATS utility that compares the resource consumption of two alternative units of work. Designed to work under constrained developer environments and builds on the original with enhancements such as "pause and resume" functionality, time model statistics and the option to report on specific statistics. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a free-standing SQL*Plus script (i.e. no installation/database objects needed). January 2007 (updated October 2011)

Xplan utility

A utility to add parent ID and execution order information to plans reported by DBMS_XPLAN. XPlan includes DISPLAY, DISPLAY_CURSOR and DISPLAY_AWR functionality for use in exactly the same way as the DBMS_XPLAN equivalents. Supports versions from 10g onwards. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a collection of three free-standing SQL*Plus scripts (i.e. no installation/database objects needed). January 2009 (updated October 2011)

Runstats utility

A variation on Tom Kyte's invaluable RUNSTATS utility that compares the resource consumption of two alternative units of work. Designed to work under constrained developer environments and builds on the original with enhancements such as "pause and resume" functionality, time model statistics and the option to report on specific statistics. ***Update*** Now available in two formats: 1) as a PL/SQL package and 2) as a free-standing SQL*Plus script (i.e. no installation/database objects needed). January 2007 (updated October 2011)