fleet/changes/33147-increased-db-load
Victor Lyuboslavsky d6695bf299
Fixed MySQL DB performance regressions (#33184)
Resolves #33147 

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing

- [x] Added/updated automated tests
- [x] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)

- [x] QA'd all new/changed functionality manually

## Database migrations

- [x] Checked table schema to confirm autoupdate


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- Bug Fixes
- Resolved MySQL performance regressions from 4.73.0/4.73.1 affecting OS
versions and software titles views, improving load times and reducing
timeouts.

- Refactor
- Optimized OS vulnerabilities fetching by batching multiple OS versions
in a single request.
- Added a supporting database index to speed kernel-related
vulnerability queries.

- Tests
- Added comprehensive tests for multi-OS vulnerability retrieval, CVSS
enrichment, team-scoped data, and service endpoint behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2025-09-19 15:35:05 -05:00

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Fixed MySQL DB performance regressions introduced in Fleet 4.73.0/4.73.1 affecting OS versions and software titles read queries.