208 lines
6.0 KiB
Markdown
208 lines
6.0 KiB
Markdown
## Some useful SQL queries for Synapse Admins
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## Size of full matrix db
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```sql
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SELECT pg_size_pretty( pg_database_size( 'matrix' ) );
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```
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### Result example:
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```
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pg_size_pretty
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----------------
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6420 MB
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(1 row)
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```
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## Show top 20 larger tables by row count
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```sql
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SELECT relname, n_live_tup AS "rows"
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FROM pg_stat_user_tables
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ORDER BY n_live_tup DESC
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LIMIT 20;
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```
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This query is quick, but may be very approximate, for exact number of rows use:
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```sql
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SELECT COUNT(*) FROM <table_name>;
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```
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### Result example:
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```
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state_groups_state - 161687170
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event_auth - 8584785
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event_edges - 6995633
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event_json - 6585916
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event_reference_hashes - 6580990
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events - 6578879
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received_transactions - 5713989
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event_to_state_groups - 4873377
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stream_ordering_to_exterm - 4136285
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current_state_delta_stream - 3770972
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event_search - 3670521
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state_events - 2845082
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room_memberships - 2785854
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cache_invalidation_stream - 2448218
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state_groups - 1255467
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state_group_edges - 1229849
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current_state_events - 1222905
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users_in_public_rooms - 364059
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device_lists_stream - 326903
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user_directory_search - 316433
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```
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## Show top 20 larger tables by storage size
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```sql
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SELECT nspname || '.' || relname AS "relation",
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pg_size_pretty(pg_total_relation_size(c.oid)) AS "total_size"
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FROM pg_class c
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LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace)
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WHERE nspname NOT IN ('pg_catalog', 'information_schema')
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AND c.relkind <> 'i'
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AND nspname !~ '^pg_toast'
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ORDER BY pg_total_relation_size(c.oid) DESC
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LIMIT 20;
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```
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### Result example:
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```
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public.state_groups_state - 27 GB
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public.event_json - 9855 MB
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public.events - 3675 MB
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public.event_edges - 3404 MB
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public.received_transactions - 2745 MB
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public.event_reference_hashes - 1864 MB
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public.event_auth - 1775 MB
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public.stream_ordering_to_exterm - 1663 MB
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public.event_search - 1370 MB
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public.room_memberships - 1050 MB
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public.event_to_state_groups - 948 MB
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public.current_state_delta_stream - 711 MB
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public.state_events - 611 MB
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public.presence_stream - 530 MB
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public.current_state_events - 525 MB
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public.cache_invalidation_stream - 466 MB
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public.receipts_linearized - 279 MB
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public.state_groups - 160 MB
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public.device_lists_remote_cache - 124 MB
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public.state_group_edges - 122 MB
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```
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## Show top 20 larger rooms by state events count
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You get the same information when you use the
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[admin API](../../admin_api/rooms.md#list-room-api)
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and set parameter `order_by=state_events`.
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```sql
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SELECT r.name, s.room_id, s.current_state_events
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FROM room_stats_current s
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LEFT JOIN room_stats_state r USING (room_id)
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ORDER BY current_state_events DESC
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LIMIT 20;
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```
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and by state_group_events count:
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```sql
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SELECT rss.name, s.room_id, COUNT(s.room_id)
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FROM state_groups_state s
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LEFT JOIN room_stats_state rss USING (room_id)
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GROUP BY s.room_id, rss.name
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ORDER BY COUNT(s.room_id) DESC
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LIMIT 20;
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```
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plus same, but with join removed for performance reasons:
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```sql
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SELECT s.room_id, COUNT(s.room_id)
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FROM state_groups_state s
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GROUP BY s.room_id
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ORDER BY COUNT(s.room_id) DESC
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LIMIT 20;
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```
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## Show top 20 rooms by new events count in last 1 day:
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```sql
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SELECT e.room_id, r.name, COUNT(e.event_id) cnt
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FROM events e
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LEFT JOIN room_stats_state r USING (room_id)
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WHERE e.origin_server_ts >= DATE_PART('epoch', NOW() - INTERVAL '1 day') * 1000
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GROUP BY e.room_id, r.name
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ORDER BY cnt DESC
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LIMIT 20;
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```
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## Show top 20 users on homeserver by sent events (messages) at last month:
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Caution. This query does not use any indexes, can be slow and create load on the database.
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```sql
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SELECT COUNT(*), sender
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FROM events
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WHERE (type = 'm.room.encrypted' OR type = 'm.room.message')
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AND origin_server_ts >= DATE_PART('epoch', NOW() - INTERVAL '1 month') * 1000
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GROUP BY sender
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ORDER BY COUNT(*) DESC
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LIMIT 20;
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```
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## Show last 100 messages from needed user, with room names:
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```sql
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SELECT e.room_id, r.name, e.event_id, e.type, e.content, j.json
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FROM events e
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LEFT JOIN event_json j USING (room_id)
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LEFT JOIN room_stats_state r USING (room_id)
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WHERE sender = '@LOGIN:example.com'
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AND e.type = 'm.room.message'
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ORDER BY stream_ordering DESC
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LIMIT 100;
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```
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## Show rooms with names, sorted by events in this rooms
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**Sort and order with bash**
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```bash
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echo "SELECT event_json.room_id, room_stats_state.name FROM event_json, room_stats_state \
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WHERE room_stats_state.room_id = event_json.room_id" | psql -d synapse -h localhost -U synapse_user -t \
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| sort | uniq -c | sort -n
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```
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Documentation for `psql` command line parameters: https://www.postgresql.org/docs/current/app-psql.html
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**Sort and order with SQL**
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```sql
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SELECT COUNT(*), event_json.room_id, room_stats_state.name
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FROM event_json, room_stats_state
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WHERE room_stats_state.room_id = event_json.room_id
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GROUP BY event_json.room_id, room_stats_state.name
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ORDER BY COUNT(*) DESC
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LIMIT 50;
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```
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### Result example:
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```
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9459 !FPUfgzXYWTKgIrwKxW:matrix.org | This Week in Matrix
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9459 !FPUfgzXYWTKgIrwKxW:matrix.org | This Week in Matrix (TWIM)
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17799 !iDIOImbmXxwNngznsa:matrix.org | Linux in Russian
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18739 !GnEEPYXUhoaHbkFBNX:matrix.org | Riot Android
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23373 !QtykxKocfZaZOUrTwp:matrix.org | Matrix HQ
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39504 !gTQfWzbYncrtNrvEkB:matrix.org | ru.[matrix]
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43601 !iNmaIQExDMeqdITdHH:matrix.org | Riot
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43601 !iNmaIQExDMeqdITdHH:matrix.org | Riot Web/Desktop
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```
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## Lookup room state info by list of room_id
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You get the same information when you use the
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[admin API](../../admin_api/rooms.md#room-details-api).
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```sql
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SELECT rss.room_id, rss.name, rss.canonical_alias, rss.topic, rss.encryption,
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rsc.joined_members, rsc.local_users_in_room, rss.join_rules
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FROM room_stats_state rss
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LEFT JOIN room_stats_current rsc USING (room_id)
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WHERE room_id IN (
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'!OGEhHVWSdvArJzumhm:matrix.org',
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'!YTvKGNlinIzlkMTVRl:matrix.org'
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);
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```
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## Show users and devices that have not been online for a while
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```sql
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SELECT user_id, device_id, user_agent, TO_TIMESTAMP(last_seen / 1000) AS "last_seen"
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FROM devices
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WHERE last_seen < DATE_PART('epoch', NOW() - INTERVAL '3 month') * 1000;
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```
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