yugabyte/yugabyte-db

[DocDB] yb-admin command to clear the block cache

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#25,722 opened on Jan 22, 2025

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area/docdbgood first issuekind/enhancementpriority/medium

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Description

Jira Link: DB-14995

Description

Provide a yb-admin command to clear the block cache. This is useful in performance experiments where we would want to clean up the block cache after one experiment, so as to not allow the block cache to interfere with the results of the next experiment.

This can be implemented the same way as already done for flush_table yb-admin command but for simplicity of use and implementation just clear the whole block cache on all tservers and don't take any parameters.

Issue Type

kind/enhancement

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Contributor guide

Research direction
Study the existing 'flush table' yb admin command implementation in the codebase, then implement a similar 'clear block cache' command that sends a request to all tservers to clear their block cache.
Tech stack
ccpp
Domain
backenddatabasecli
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70