High DB usage while logs continuously say `sync_partial_state_room-244 - Updating state for $eventid`

### Description

After deploying v1.102.0 final release on matrix.org, we noticed that the `get_partial_state_events_batch` DB txn was taking a lot of DB time on the main process. The restart happened at 13:03 (the gap):


Potentially related to https://github.com/element-hq/synapse/issues/16895, though with a different failure mode.

This is hammering the database. At the moment we're waiting to see if the partial sync completes successfully.

### Steps to reproduce

Join a room over federation with partial room joins enabled.

### Homeserver

matrix.org

### Synapse Version

v1.102.0

### Installation Method

pip (from PyPI)

### Database

PostgreSQL

### Workers

Multiple workers

### Platform

linux

### Configuration

_No response_

### Relevant log output

Click to see log output

```
2024-03-05 13:03:39,418 - synapse.handlers.federation - 1917 - INFO - sync_partial_state_room-244 - Syncing state for room !redacted via pixie.town
2024-03-05 13:03:57,312 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc
2024-03-05 13:03:59,173 - synapse.handlers.federation_event - 1129 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc- - Event $H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc is missing prev_events ['$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw']: calculating state for a backwards extremity
2024-03-05 13:03:59,173 - synapse.handlers.federation_event - 1151 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc- - Requesting state after missing prev_event $4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw
2024-03-05 13:04:11,322 - synapse.http.matrixfederationclient - 362 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw-- - {GET-O-2500} [pixie.town] Completed request: 200 OK in 12.15 secs, got 1252629 bytes - GET matrix-federation://pixie.town/_matrix/federation/v1/state_ids/%21FoJntBPsgEcEgAcddK%3Apixie.town?event_id=%244yWz8-DUZbbktdlkYXFUrI3
2024-03-05 13:05:42,921 - synapse.http.matrixfederationclient - 362 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw--- - {GET-O-7483} [pixie.town] Completed request: 200 OK in 71.00 secs, got 22325777 bytes - GET matrix-federation://pixie.town/_matrix/federation/v1/state/%21FoJntBPsgEcEgAcddK%3Apixie.town?event_id=%244yWz8-DUZbbktdlkYXFUrI3ZA
2024-03-05 13:05:44,544 - synapse.federation.federation_client - 638 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw--- - Processing from /state: 1786 state events, 24858 auth events
2024-03-05 13:06:16,429 - synapse.handlers.federation_event - 1387 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw-- - /state returned 26644 events
2024-03-05 13:06:35,167 - synapse.handlers.federation_event - 1690 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw--- - Persisting 3278 remaining outliers: ['$-4ynY9w4mVnrZAPfAb1SQ3OLLr-lwtX1Kwq7S1ygmK0', '$-BL74jNOWkAOANfGgHg3auPKFd8iDOIdcCW74vyIuWo', '$-SVvPXeNreDFV2YI-d3V09moBVI6-66byRf0ZoS5gNQ', '$-VGBEGeNnNkwCoaMiR1AjgHoXRNHI60O49dRHESoa
2024-03-05 13:06:39,981 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/QhOKxsUtEN: 200
2024-03-05 13:06:39,982 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'events' to reach 4751683348 (event_persister-2); currently at: 4751682674
2024-03-05 13:06:45,056 - synapse.replication.tcp.client - 340 - WARNING - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Timed out waiting for repl stream 'events' to reach 4751683348 (event_persister-2); currently at: 4751683057
2024-03-05 13:06:45,056 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47736336 (event_persister-2); currently at: 47736135
2024-03-05 13:06:48,331 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47736336 (event_persister-2)
2024-03-05 13:06:49,929 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/eSZNlUbcMx: 200
2024-03-05 13:06:49,930 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'events' to reach 4751683720 (event_persister-2); currently at: 4751683511
2024-03-05 13:06:51,879 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'events' to reach 4751683720 (event_persister-2)
2024-03-05 13:06:51,879 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47736539 (event_persister-2); currently at: 47736439
2024-03-05 13:06:51,896 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47736539 (event_persister-2)
2024-03-05 13:06:54,058 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/PrKgEqCrUJ: 200
2024-03-05 13:06:54,058 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'events' to reach 4751683872 (event_persister-2); currently at: 4751683859
2024-03-05 13:06:54,390 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'events' to reach 4751683872 (event_persister-2)
2024-03-05 13:06:54,390 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47736739 (event_persister-2); currently at: 47736639
2024-03-05 13:06:54,424 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47736739 (event_persister-2)
2024-03-05 13:06:57,497 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/haeYAifNLt: 200
2024-03-05 13:06:57,498 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47736939 (event_persister-2); currently at: 47736839
2024-03-05 13:06:57,576 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47736939 (event_persister-2)
2024-03-05 13:06:59,591 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/GtIIVqoKuz: 200
2024-03-05 13:06:59,594 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47737139 (event_persister-2); currently at: 47737039
2024-03-05 13:06:59,671 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47737139 (event_persister-2)
2024-03-05 13:07:01,123 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/cOGPtOyHPt: 200
2024-03-05 13:07:01,123 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47737339 (event_persister-2); currently at: 47737239
2024-03-05 13:07:01,163 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47737339 (event_persister-2)
2024-03-05 13:07:02,497 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/XLqUkCUyXY: 200
2024-03-05 13:07:03,360 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/sDgzudgLnZ: 200
2024-03-05 13:07:03,360 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47737741 (event_persister-2); currently at: 47737641
2024-03-05 13:07:03,418 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47737741 (event_persister-2)
2024-03-05 13:07:04,681 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/XPMDwvzSzx: 200
2024-03-05 13:07:04,681 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47737941 (event_persister-2); currently at: 47737841
2024-03-05 13:07:04,729 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47737941 (event_persister-2)
2024-03-05 13:07:05,640 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/iaFoHXTZft: 200
2024-03-05 13:07:05,641 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47738141 (event_persister-2); currently at: 47738041
2024-03-05 13:07:05,684 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47738141 (event_persister-2)
2024-03-05 13:07:06,494 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/ETXsDuGxss: 200
2024-03-05 13:07:06,494 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47738342 (event_persister-2); currently at: 47738242
2024-03-05 13:07:06,558 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47738342 (event_persister-2)
2024-03-05 13:07:07,463 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/QnoHUjVgFG: 200
2024-03-05 13:07:07,464 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47738542 (event_persister-2); currently at: 47738442
2024-03-05 13:07:07,490 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47738542 (event_persister-2)
2024-03-05 13:07:08,368 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/PcmBNktafn: 200
2024-03-05 13:07:08,368 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47738742 (event_persister-2); currently at: 47738642
2024-03-05 13:07:08,407 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47738742 (event_persister-2)
2024-03-05 13:07:09,184 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/WaHBqABMMU: 200
2024-03-05 13:07:09,184 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47738942 (event_persister-2); currently at: 47738842
2024-03-05 13:07:09,229 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47738942 (event_persister-2)
2024-03-05 13:07:10,094 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/pUiDgPHBLs: 200
2024-03-05 13:07:10,095 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47739142 (event_persister-2); currently at: 47739042
2024-03-05 13:07:10,126 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47739142 (event_persister-2)
2024-03-05 13:07:10,869 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/nljjhUMXFb: 200
2024-03-05 13:07:10,869 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47739342 (event_persister-2); currently at: 47739242
2024-03-05 13:07:10,915 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47739342 (event_persister-2)
2024-03-05 13:07:11,280 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----- - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/xPJvGFuKYH: 200
2024-03-05 13:07:11,281 - synapse.replication.tcp.client - 330 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Waiting for repl stream 'backfill' to reach 47739420 (event_persister-2); currently at: 47739342
2024-03-05 13:07:11,311 - synapse.replication.tcp.client - 350 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Finished waiting for repl stream 'backfill' to reach 47739420 (event_persister-2)
2024-03-05 13:07:11,506 - synapse.http.matrixfederationclient - 362 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw----$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw- - {GET-O-12822} [pixie.town] Completed request: 200 OK in 0.17 secs, got 774 bytes - GET matrix-federation://pixie.town/_matrix/federation/v1/event/%244yWz8-DUZbbktdlkYXFUrI3ZAfXx
2024-03-05 13:07:11,508 - synapse.handlers.federation_event - 1638 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw--- - Fetched 1 events of 1 requested
2024-03-05 13:07:11,508 - synapse.handlers.federation_event - 1690 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw---- - Persisting 1 remaining outliers: ['$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw']
2024-03-05 13:07:11,550 - synapse.http.client - 929 - INFO - sync_partial_state_room-244-$H_h1mqnAkXjIg7BKpQZoEDAF1sQntb1ypYvv7DbWsmc--$4yWz8-DUZbbktdlkYXFUrI3ZAfXxmzSfWAybKj_DSUw------ - Received response to POST synapse-replication://event_persister-2/_synapse/replication/fed_send_events/UcjgvsJOXQ: 200
2024-03-05 13:07:13,624 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $lwXtryTVdA9GncJHnj-oH1jmPro9Cbnzj2-J0wKyThk
2024-03-05 13:07:14,493 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $pB-icAKJTTHGPv_7RKC-OipO6OW2RZw4axExCRpEw1U
2024-03-05 13:07:14,571 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $XOWsJkRK6GNiF-tN6ts4wTUUzasdzXBiS55qFYSeSEQ
2024-03-05 13:07:15,406 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $KMlU0n2SLVv3-5ap8vX9-JYcTX5UPGFMDHkvg7QP25A
2024-03-05 13:07:16,248 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $1c72mLfsazsAMq89UvMm-aL9hUOQW9SkKnJPp2ZQ_fI
2024-03-05 13:07:17,107 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $tx29v3bWlNv_SSKPxnS8rHYZAu4cpe2OVlDbX0QDps0
2024-03-05 13:07:17,158 - synapse.state - 668 - INFO - sync_partial_state_room-244-$tx29v3bWlNv_SSKPxnS8rHYZAu4cpe2OVlDbX0QDps0--- - Resolving state for !redacted with groups [871818734, 871818751]
2024-03-05 13:07:18,889 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $vIVUmnseSYThrprQMgodllJU85ryAJOdMhzeKFEqyHg
2024-03-05 13:07:19,681 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $q9kvCDQZS-lZirPTLH9nTzR1KCQSyJsednWxUACAdF8
2024-03-05 13:07:20,499 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $O7nuFFdjk80Cfj8iNYDfzUAtktBMPDLcHedwD779t2k
2024-03-05 13:07:21,359 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $l2TwbsIm78sz23x9ARJKLsJY90Q5WWk7tuXWraXQDMs
2024-03-05 13:07:22,247 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $T5N2C9z6-KQlQG8lxWhiSd1MX2ZQrrkHfXMbviADoYo
2024-03-05 13:07:23,173 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $OVrCsgdHviH20PTLl4O0ZiwXAGN51aqkUk_N5bPY9ZI
2024-03-05 13:07:24,090 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $hzdJkNCIvcBbSKei92PKaGDf1yyRDLC1tyAxA_At768
2024-03-05 13:07:25,007 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $1s80bOxuZlmS3dqlBegdL-u6qkC0JuOpXaKPEXuK90E
2024-03-05 13:07:26,400 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $EPOabdEMG1ga5no1K2m9qh0OKnPH_7GEA-XNldF9idw
2024-03-05 13:07:27,447 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $IbUWbi1neFFIgP7VribdEaRq8Ka1bmk6oolSL99F5BI
2024-03-05 13:07:28,448 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $5lZc2ucAt-FaaaOS-aIiE7YyYMMMP-knbZ6ZH-JKWEk
2024-03-05 13:07:29,235 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $t50HKgV8C1A2q13YNqEEzGXiWY8w_81-pqtLCazS0Ic
2024-03-05 13:07:30,287 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $GyOykj_w2gLVrt6g6s9lZTKjEpqd_kALzYkHtfLeIl0
2024-03-05 13:07:31,217 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $3-geVsRwjyea1sr6Oo2oBXcnuJ_hEGb28XCeg1vQbCQ
2024-03-05 13:07:32,155 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $wqX7SQqIdJX_QURV3Angf7n3lTnuaOAYa10eMldzgyI
2024-03-05 13:07:32,964 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $iTP2mJH_IryadahiEaBLgT2-YgHsvWNu6zv-5uskAkg
2024-03-05 13:07:33,767 - synapse.handlers.federation_event - 628 - INFO - sync_partial_state_room-244 - Updating state for $YxzY0i7SLzwKJHsz-BOIWLbfUZIXJc4x-woqZWri7Q4
...
```

### Anything else that would be useful to know?

_No response_