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< h2 id = "some-useful-sql-queries-for-synapse-admins" > < a class = "header" href = "#some-useful-sql-queries-for-synapse-admins" > Some useful SQL queries for Synapse Admins< / a > < / h2 >
< h2 id = "size-of-full-matrix-db" > < a class = "header" href = "#size-of-full-matrix-db" > Size of full matrix db< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT pg_size_pretty( pg_database_size( 'matrix' ) );
< / code > < / pre >
< h3 id = "result-example" > < a class = "header" href = "#result-example" > Result example:< / a > < / h3 >
< pre > < code > pg_size_pretty
----------------
6420 MB
(1 row)
< / code > < / pre >
< h2 id = "show-top-20-larger-tables-by-row-count" > < a class = "header" href = "#show-top-20-larger-tables-by-row-count" > Show top 20 larger tables by row count< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT relname, n_live_tup AS " rows"
FROM pg_stat_user_tables
ORDER BY n_live_tup DESC
LIMIT 20;
< / code > < / pre >
< p > This query is quick, but may be very approximate, for exact number of rows use:< / p >
< pre > < code class = "language-sql" > SELECT COUNT(*) FROM < table_name> ;
< / code > < / pre >
< h3 id = "result-example-1" > < a class = "header" href = "#result-example-1" > Result example:< / a > < / h3 >
< pre > < code > state_groups_state - 161687170
event_auth - 8584785
event_edges - 6995633
event_json - 6585916
event_reference_hashes - 6580990
events - 6578879
received_transactions - 5713989
event_to_state_groups - 4873377
stream_ordering_to_exterm - 4136285
current_state_delta_stream - 3770972
event_search - 3670521
state_events - 2845082
room_memberships - 2785854
cache_invalidation_stream - 2448218
state_groups - 1255467
state_group_edges - 1229849
current_state_events - 1222905
users_in_public_rooms - 364059
device_lists_stream - 326903
user_directory_search - 316433
< / code > < / pre >
< h2 id = "show-top-20-larger-tables-by-storage-size" > < a class = "header" href = "#show-top-20-larger-tables-by-storage-size" > Show top 20 larger tables by storage size< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT nspname || '.' || relname AS " relation" ,
pg_size_pretty(pg_total_relation_size(c.oid)) AS " total_size"
FROM pg_class c
LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace)
WHERE nspname NOT IN ('pg_catalog', 'information_schema')
AND c.relkind < > 'i'
AND nspname !~ '^pg_toast'
ORDER BY pg_total_relation_size(c.oid) DESC
LIMIT 20;
< / code > < / pre >
< h3 id = "result-example-2" > < a class = "header" href = "#result-example-2" > Result example:< / a > < / h3 >
< pre > < code > public.state_groups_state - 27 GB
public.event_json - 9855 MB
public.events - 3675 MB
public.event_edges - 3404 MB
public.received_transactions - 2745 MB
public.event_reference_hashes - 1864 MB
public.event_auth - 1775 MB
public.stream_ordering_to_exterm - 1663 MB
public.event_search - 1370 MB
public.room_memberships - 1050 MB
public.event_to_state_groups - 948 MB
public.current_state_delta_stream - 711 MB
public.state_events - 611 MB
public.presence_stream - 530 MB
public.current_state_events - 525 MB
public.cache_invalidation_stream - 466 MB
public.receipts_linearized - 279 MB
public.state_groups - 160 MB
public.device_lists_remote_cache - 124 MB
public.state_group_edges - 122 MB
< / code > < / pre >
< h2 id = "show-top-20-larger-rooms-by-state-events-count" > < a class = "header" href = "#show-top-20-larger-rooms-by-state-events-count" > Show top 20 larger rooms by state events count< / a > < / h2 >
< p > You get the same information when you use the
< a href = "../../admin_api/rooms.html#list-room-api" > admin API< / a >
and set parameter < code > order_by=state_events< / code > .< / p >
< pre > < code class = "language-sql" > SELECT r.name, s.room_id, s.current_state_events
FROM room_stats_current s
LEFT JOIN room_stats_state r USING (room_id)
ORDER BY current_state_events DESC
LIMIT 20;
< / code > < / pre >
< p > and by state_group_events count:< / p >
< pre > < code class = "language-sql" > SELECT rss.name, s.room_id, COUNT(s.room_id)
FROM state_groups_state s
LEFT JOIN room_stats_state rss USING (room_id)
GROUP BY s.room_id, rss.name
ORDER BY COUNT(s.room_id) DESC
LIMIT 20;
< / code > < / pre >
< p > plus same, but with join removed for performance reasons:< / p >
< pre > < code class = "language-sql" > SELECT s.room_id, COUNT(s.room_id)
FROM state_groups_state s
GROUP BY s.room_id
ORDER BY COUNT(s.room_id) DESC
LIMIT 20;
< / code > < / pre >
< h2 id = "show-top-20-rooms-by-new-events-count-in-last-1-day" > < a class = "header" href = "#show-top-20-rooms-by-new-events-count-in-last-1-day" > Show top 20 rooms by new events count in last 1 day:< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT e.room_id, r.name, COUNT(e.event_id) cnt
FROM events e
LEFT JOIN room_stats_state r USING (room_id)
WHERE e.origin_server_ts > = DATE_PART('epoch', NOW() - INTERVAL '1 day') * 1000
GROUP BY e.room_id, r.name
ORDER BY cnt DESC
LIMIT 20;
< / code > < / pre >
< h2 id = "show-top-20-users-on-homeserver-by-sent-events-messages-at-last-month" > < a class = "header" href = "#show-top-20-users-on-homeserver-by-sent-events-messages-at-last-month" > Show top 20 users on homeserver by sent events (messages) at last month:< / a > < / h2 >
< p > Caution. This query does not use any indexes, can be slow and create load on the database.< / p >
< pre > < code class = "language-sql" > SELECT COUNT(*), sender
FROM events
WHERE (type = 'm.room.encrypted' OR type = 'm.room.message')
AND origin_server_ts > = DATE_PART('epoch', NOW() - INTERVAL '1 month') * 1000
GROUP BY sender
ORDER BY COUNT(*) DESC
LIMIT 20;
< / code > < / pre >
< h2 id = "show-last-100-messages-from-needed-user-with-room-names" > < a class = "header" href = "#show-last-100-messages-from-needed-user-with-room-names" > Show last 100 messages from needed user, with room names:< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT e.room_id, r.name, e.event_id, e.type, e.content, j.json
FROM events e
LEFT JOIN event_json j USING (room_id)
LEFT JOIN room_stats_state r USING (room_id)
WHERE sender = '@LOGIN:example.com'
AND e.type = 'm.room.message'
ORDER BY stream_ordering DESC
LIMIT 100;
< / code > < / pre >
< h2 id = "show-rooms-with-names-sorted-by-events-in-this-rooms" > < a class = "header" href = "#show-rooms-with-names-sorted-by-events-in-this-rooms" > Show rooms with names, sorted by events in this rooms< / a > < / h2 >
< p > < strong > Sort and order with bash< / strong > < / p >
< pre > < code class = "language-bash" > echo " SELECT event_json.room_id, room_stats_state.name FROM event_json, room_stats_state \
WHERE room_stats_state.room_id = event_json.room_id" | psql -d synapse -h localhost -U synapse_user -t \
| sort | uniq -c | sort -n
< / code > < / pre >
< p > Documentation for < code > psql< / code > command line parameters: https://www.postgresql.org/docs/current/app-psql.html< / p >
< p > < strong > Sort and order with SQL< / strong > < / p >
< pre > < code class = "language-sql" > SELECT COUNT(*), event_json.room_id, room_stats_state.name
FROM event_json, room_stats_state
WHERE room_stats_state.room_id = event_json.room_id
GROUP BY event_json.room_id, room_stats_state.name
ORDER BY COUNT(*) DESC
LIMIT 50;
< / code > < / pre >
< h3 id = "result-example-3" > < a class = "header" href = "#result-example-3" > Result example:< / a > < / h3 >
< pre > < code > 9459 !FPUfgzXYWTKgIrwKxW:matrix.org | This Week in Matrix
9459 !FPUfgzXYWTKgIrwKxW:matrix.org | This Week in Matrix (TWIM)
17799 !iDIOImbmXxwNngznsa:matrix.org | Linux in Russian
18739 !GnEEPYXUhoaHbkFBNX:matrix.org | Riot Android
23373 !QtykxKocfZaZOUrTwp:matrix.org | Matrix HQ
39504 !gTQfWzbYncrtNrvEkB:matrix.org | ru.[matrix]
43601 !iNmaIQExDMeqdITdHH:matrix.org | Riot
43601 !iNmaIQExDMeqdITdHH:matrix.org | Riot Web/Desktop
< / code > < / pre >
< h2 id = "lookup-room-state-info-by-list-of-room_id" > < a class = "header" href = "#lookup-room-state-info-by-list-of-room_id" > Lookup room state info by list of room_id< / a > < / h2 >
< p > You get the same information when you use the
< a href = "../../admin_api/rooms.html#room-details-api" > admin API< / a > .< / p >
< pre > < code class = "language-sql" > SELECT rss.room_id, rss.name, rss.canonical_alias, rss.topic, rss.encryption,
rsc.joined_members, rsc.local_users_in_room, rss.join_rules
FROM room_stats_state rss
LEFT JOIN room_stats_current rsc USING (room_id)
WHERE room_id IN ( WHERE room_id IN (
'!OGEhHVWSdvArJzumhm:matrix.org',
'!YTvKGNlinIzlkMTVRl:matrix.org'
);
< / code > < / pre >
< h2 id = "show-users-and-devices-that-have-not-been-online-for-a-while" > < a class = "header" href = "#show-users-and-devices-that-have-not-been-online-for-a-while" > Show users and devices that have not been online for a while< / a > < / h2 >
< pre > < code class = "language-sql" > SELECT user_id, device_id, user_agent, TO_TIMESTAMP(last_seen / 1000) AS " last_seen"
FROM devices
WHERE last_seen < DATE_PART('epoch', NOW() - INTERVAL '3 month') * 1000;
< / code > < / pre >
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< script src = "../../highlight.js" type = "text/javascript" charset = "utf-8" > < / script >
< script src = "../../book.js" type = "text/javascript" charset = "utf-8" > < / script >
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< / body >
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< / html >
