Observability

Running queries are not displayed in SolarWinds Observability SaaS

You are not seeing queries that you know are executing.

First published date

5/8/2025 3:34 PM

Last published date

5/8/2025 3:34 PM

Overview

On-host monitoring: Captures queries sent over unencrypted TCP/IP connections.
Off-host monitoring: Missing queries usually indicate issues with performance_schema or pg_stat_statements not capturing the query.

Product section

SolarWinds Observability

Cause

Queries sent over Unix sockets or encrypted connections are not captured.
Queries executed from stored routines, replication, or those that were killed or did not finish are not captured.
Missing queries in off-host monitoring may be due to performance_schema or pg_stat_statements not capturing the query.

Resolution

Performance Schema Digest Lost:
- Issue: MySQL did not record some query digests due to the maximum size limit of events_statements_summary_by_digest.
- Fix:
  - Run TRUNCATE TABLE performance_schema.events_statements_summary_by_digest or restart the server.
  - Configure the agent to automatically truncate the table when the percentage of digests lost exceeds a threshold:
    - Grant DROP privilege on performance_schema.events_statements_summary_by_digest to the database user.
    - Add "ps-truncate-events-summary":"true" and "ps-others-tolerance":"X" in the dbo-global.conf file.
    - Restart the DBO Plugins.

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