#16331
Doc updates in a separate PR:
https://github.com/fleetdm/fleet/pull/17214
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality (smoke-tested locally
with osquery-perf simulating 100 hosts, ran a live query, a saved live
query, stopped naturally and stopped before the end, and again via
fleetctl)
---------
Co-authored-by: Victor Lyuboslavsky <victor@fleetdm.com>
Co-authored-by: Victor Lyuboslavsky <victor.lyuboslavsky@gmail.com>
This change optimizes live queries by pushing the computation of query
targets to the creation time of the query, and efficiently caching the
targets in Redis. This results in a huge performance improvement at both
steady-state, and when running live queries.
- Live queries are stored using a bitfield in Redis, and takes
advantage of bitfield operations to be extremely efficient.
- Only run Redis live query test when REDIS_TEST is set in environment
- Ensure that live queries are only sent to hosts when there is a client
listening for results. Addresses an existing issue in Fleet along with
appropriate cleanup for the refactored live query backend.
