This default setup will be more realistic, matching the ordinary
conditions for a modern server.
Especially needed as we add bouncer code that will expect to have
RemoteRealm entries for realm_uuid values for which it receives
requests.
[squash]: Update sponsorsip and question boxes for Cloud.
[squash]: Update tabs subtitles.
[squash]: Content for info boxes for self-hosted plans.
[squash]: Adjust content to fit design.
portico: Tweak /plans text.
We want to both (a) take a lock on the UserProfile row, and (b)
modify the passed-in UserProfile object, so that callers see the
changes in the object they hold. Unfortunately,
`select_for_update` cannot be combined with `refresh_from_db`
(https://code.djangoproject.com/ticket/28344). Call
`select_for_update` and throw away the result, so that we know we have
the lock on the row, then re-fill the `user_profile` object with the
values now that the lock exists.
Limiting only by client_name and query leads to a very poorly-indexed
lookup on `query` which throws out nearly all of its rows:
```
Nested Loop (cost=50885.64..60522.96 rows=821 width=8)
-> Index Scan using zerver_client_name_key on zerver_client (cost=0.28..2.49 rows=1 width=4)
Index Cond: ((name)::text = 'zephyr_mirror'::text)
-> Bitmap Heap Scan on zerver_useractivity (cost=50885.37..60429.95 rows=9052 width=12)
Recheck Cond: ((client_id = zerver_client.id) AND ((query)::text = ANY ('{get_events,/api/v1/events}'::text[])))
-> BitmapAnd (cost=50885.37..50885.37 rows=9052 width=0)
-> Bitmap Index Scan on zerver_useractivity_2bfe9d72 (cost=0.00..16631.82 rows=..large.. width=0)
Index Cond: (client_id = zerver_client.id)
-> Bitmap Index Scan on zerver_useractivity_1b1cc7f0 (cost=0.00..34103.95 rows=..large.. width=0)
Index Cond: ((query)::text = ANY ('{get_events,/api/v1/events}'::text[]))
```
A partial index on the client and query list is extremely effective
here in reducing PostgreSQL's workload; however, we cannot easily
write it as a migration, since it depends on the value of the ID of
the `zephyr_mirror` client.
Since this is only relevant for Zulip Cloud, we manually create the
index:
```sql
CREATE INDEX CONCURRENTLY zerver_useractivity_zehpyr_liveness
ON zerver_useractivity(last_visit)
WHERE client_id = 1005
AND query IN ('get_events', '/api/v1/events');
```
We rewrite the query to do the time limit, distinct, and count in SQL,
instead of Python, and make use of this index. This turns a 20-second
query into two 10ms queries.
We’re currently generating the icon font in five formats: Embedded
OpenType, WOFF, WOFF2, TrueType, and SVG. But they’re misordered by
webfonts-loader such that modern browsers always select the WOFF
version. WOFF2 is supported by all modern browsers, so just use that
exclusively.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Mateusz Mandera
Karl Stolley
evykassirer
Anders Kaseorg
Alya Abbott
N-Shar-ma
Aman Agrawal
Prakhar Pratyush
Alex Vandiver