diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml index c8ae1a44b..b75269a15 100644 --- a/.buildkite/pipeline.yml +++ b/.buildkite/pipeline.yml @@ -49,14 +49,15 @@ steps: - command: - - "python -m pip install tox" + - "apt-get update && apt-get install -y python3.5 python3.5-dev python3-pip libxml2-dev libxslt-dev zlib1g-dev" + - "python3.5 -m pip install tox" - "tox -e py35-old,codecov" label: ":python: 3.5 / SQLite / Old Deps" env: TRIAL_FLAGS: "-j 2" plugins: - docker#v3.0.1: - image: "python:3.5" + image: "ubuntu:xenial" # We use xenail to get an old sqlite and python propagate-environment: true retry: automatic: diff --git a/changelog.d/5770.misc b/changelog.d/5770.misc new file mode 100644 index 000000000..5e15dfd5f --- /dev/null +++ b/changelog.d/5770.misc @@ -0,0 +1 @@ +Reduce database IO usage by optimising queries for current membership. diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py index cb88e49b5..a1b9fd819 100644 --- a/synapse/storage/roommember.py +++ b/synapse/storage/roommember.py @@ -870,10 +870,10 @@ class RoomMemberStore(RoomMemberWorkerStore): next_room, = row sql = """ - UPDATE current_state_events AS c + UPDATE current_state_events SET membership = ( SELECT membership FROM room_memberships - WHERE event_id = c.event_id + WHERE event_id = current_state_events.event_id ) WHERE room_id = ? """