Runbook

Slow Elasticsearch Garbage Collection

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Overview

This incident type refers to a problem that occurs when garbage collection takes a longer time than usual to complete in an Elasticsearch system. Garbage collection is a process used by Elasticsearch to free up memory occupied by unused objects and data structures. When this process takes longer than expected, it can slow down the overall performance of the system, causing delays and potential downtime. This issue can be caused by a variety of factors, including insufficient memory allocation or poor system resource management.

Parameters

Debug

Check Elasticsearch cluster health and node status

Check Elasticsearch cluster and node stats

Check Elasticsearch garbage collection stats

Check Elasticsearch heap usage and garbage collection logs

Check Elasticsearch garbage collection logs

Repair

Increase the memory allocation for Elasticsearch to ensure that it has enough resources to complete garbage collection efficiently.

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