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Title: Measure overlay-base database size at the clear cleanup level by henrymercer · Pull Request #3979 · github/codeql-action · GitHub

Open Graph Title: Measure overlay-base database size at the clear cleanup level by henrymercer · Pull Request #3979 · github/codeql-action

X Title: Measure overlay-base database size at the clear cleanup level by henrymercer · Pull Request #3979 · github/codeql-action

Description: This lets us compare the storage cost of overlay-base and trimmed databases for the same commit. This only happens when the feature flag for uploading overlay DBs to the GitHub API is enabled (currently staff only) and when running on the default branch. There is some performance penalty to taking this measurement, but since it's on the default branch, this seems justifiable for the time period that we are rolling out uploading overlay DBs to the GitHub API. We could also just compare the zipped DB size with and without the feature flag, but this change has the benefit of giving us the numbers on the same commit, which improves data quality. Risk assessment For internal use only. Please select the risk level of this change: Low risk: Changes are fully under feature flags, or have been fully tested and validated in pre-production environments and are highly observable, or are documentation or test only. Which use cases does this change impact? Workflow types: Advanced setup - Impacts users who have custom CodeQL workflows. Managed - Impacts users with dynamic workflows (Default Setup, Code Quality, ...). Products: Code Scanning - The changes impact analyses when analysis-kinds: code-scanning. Environments: Dotcom - Impacts CodeQL workflows on github.com and/or GitHub Enterprise Cloud with Data Residency. How did/will you validate this change? Unit tests - I am depending on unit test coverage (i.e. tests in .test.ts files). If something goes wrong after this change is released, what are the mitigation and rollback strategies? Feature flags - All new or changed code paths can be fully disabled with corresponding feature flags. How will you know if something goes wrong after this change is released? Telemetry - I rely on existing telemetry or have made changes to the telemetry. Dashboards - I will watch relevant dashboards for issues after the release. Consider whether this requires this change to be released at a particular time rather than as part of a regular release. Are there any special considerations for merging or releasing this change? No special considerations - This change can be merged at any time. Merge / deployment checklist Confirm this change is backwards compatible with existing workflows. Consider adding a changelog entry for this change. Confirm the readme and docs have been updated if necessary.

Open Graph Description: This lets us compare the storage cost of overlay-base and trimmed databases for the same commit. This only happens when the feature flag for uploading overlay DBs to the GitHub API is enabled (curr...

X Description: This lets us compare the storage cost of overlay-base and trimmed databases for the same commit. This only happens when the feature flag for uploading overlay DBs to the GitHub API is enabled (curr...

Opengraph URL: https://github.com/github/codeql-action/pull/3979

X: @github

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ad159d3 Measure overlay-base database size at the clear cleanup level henrymercer Jun 26, 2026 https://github.com/github/codeql-action/pull/3979/commits/ad159d34f6e136f6707597f40995d27df951d565
e90a71a Add tests for clear cleanup size telemetry henrymercer Jun 26, 2026 https://github.com/github/codeql-action/pull/3979/commits/e90a71aaea341c9deecb8a254ab1a8a3892f9fa4
6f8864c Address review comments henrymercer Jun 26, 2026 https://github.com/github/codeql-action/pull/3979/commits/6f8864c8b0fdaa2810bf2e549f9a9994006b6548
9cfb67b Add clarifying comments henrymercer Jun 30, 2026 https://github.com/github/codeql-action/pull/3979/commits/9cfb67bab9b32441237f92d4ba29a7f3ccff259f
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