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authorPatrick Cloke <clokep@users.noreply.github.com>2022-08-30 07:15:54 -0400
committerGitHub <noreply@github.com>2022-08-30 07:15:54 -0400
commit303b40b988bc372a81fc1a3cf62d3f5d074970ff (patch)
tree9fac44d56c449b7e11732f068283322ecb265386 /synapse/api
parentSpeed up inserting `event_push_actions_staging`. (#13634) (diff)
downloadsynapse-303b40b988bc372a81fc1a3cf62d3f5d074970ff.tar.xz
Do not wait for background updates to complete do expire URL cache. (#13657)
Media downloaded as part of a URL preview is normally deleted after two days.
However, while a background database migration is running, the process is
stopped. A long-running database migration can therefore cause the media
store to fill up with old preview files.

This logic was added in #2697 to make sure that we didn't try to run the expiry
without an index on `local_media_repository.created_ts`; the original logic that
needs that index was added in #2478 (in `get_url_cache_media_before`, as
amended by 93247a424a5068b088567fa98b6990e47608b7cb), and is still present.

Given that the background update was added before Synapse v1.0.0, just drop
this check and assume the index exists.
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