WIUNIX ACADEMY
PostgreSQL slow queries: interval statistics and row-estimate errors
Page 3 of 3. Review the earlier steps and prerequisites before continuing.
YOUR SYSTEM. YOUR STEPS.
Where are you working?
Choose your OS and version. The prerequisites, commands and troubleshooting follow your environment.
USE YOUR OWN VALUES
Configure this tutorial
Set the example values for your environment; related explanations and copy panels update together. Never enter passwords, private keys or tokens. Values stay in this tab and are not sent to the server or share links. Check actual DNS, certificates and network policy before running commands.
Different IP addresses, domains or ports? Open the settings below, change the values and select “Apply to tutorial”, then copy the updated commands.
Set values for my environment3 editable values
LET’S BUILD
Close the fixture and record one falsifiable change
Leaving the lab session removes temporary objects. No shared reset, global tuning or real index was applied. Retain redacted interval boundaries, complete statement identity, deltas, reset/dealloc state and relevant plan nodes. Propose one bounded staging change with a reversal, then remeasure comparable workload outcomes.
Same disposable psql session
\quitTemporary fixture state is gone; production configuration is unchanged.
GO TO THE SOURCE
Official references
Each environment states how it was reviewed. A documentation review does not claim a hands-on test of every version.
- PostgreSQL18: statement statistics
- PostgreSQL18: EXPLAIN
- PostgreSQL18: planner statistics
- PostgreSQL18: cumulative statistics
- PostgreSQL18: statistics object schema
- Compatibility and installation path: PostgreSQL / Ubuntu
- Compatibility and installation path: PostgreSQL / Debian
- Compatibility and installation path: PostgreSQL / RHEL, Rocky, Alma
- PostgreSQL: libpq service file
- Red Hat: diagnosing SELinux access denials
- Red Hat: firewalld inspection and management
KEEP LEARNING