I added filter() statements to do_update_message_flags().
Here is some context:
Steve Howell: Case 1, have AND clause to reduce work for DB.
humbug=> update zerver_usermessage set flags = (flags & ~1) where id > 9000;
UPDATE 382
humbug=> select count(*) from zerver_usermessage where (flags & 1) = 0;
count
-------
382
(1 row)
humbug=> explain analyze update zerver_usermessage set flags = (flags | 1) where (flags & 1) = 0;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------
Update on zerver_usermessage (cost=0.00..266.85 rows=47 width=27) (actual time=5.727..5.727 rows=0 loops=1)
-> Seq Scan on zerver_usermessage (cost=0.00..266.85 rows=47 width=27) (actual time=0.045..2.751 rows=382 loops=1)
Filter: ((flags & 1::bigint) = 0)
Rows Removed by Filter: 9000
Total runtime: 5.759 ms
(5 rows)
humbug=> select count(*) from zerver_usermessage where (flags & 1) = 0;
count
-------
0
(1 row)
Leo Franchi: Sounds reasonable, but I know way less than zev about DBs so I'll defer to his judgement :)
Steve Howell: Case 2, how the code works now:
humbug=> update zerver_usermessage set flags = (flags & ~1) where id > 9000;
UPDATE 382
humbug=> select count(*) from zerver_usermessage where (flags & 1) = 0;
count
-------
382
(1 row)
humbug=> explain analyze update zerver_usermessage set flags = (flags | 1);
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------
Update on zerver_usermessage (cost=0.00..243.28 rows=9382 width=27) (actual time=362.075..362.075 rows=0 loops=1)
-> Seq Scan on zerver_usermessage (cost=0.00..243.28 rows=9382 width=27) (actual time=0.008..6.138 rows=9382 loops=1)
Total runtime: 362.105 ms
(3 rows)
humbug=> select count(*) from zerver_usermessage where (flags & 1) = 0;
count
-------
0
(1 row)
Steve Howell: In both trials, we set it up so that only 382 of 9382 rows need to be updated. The first trial runs about 63x as fast. The second trial, if my theory is correct, is doing 24x as many writes as it needs. Both trials are reading all 9382 rows.
Steve Howell: The expense of the update statement seems to be proportional to the number of rows you "update", not the number of rows that you actually change.
Steve Howell: For now I created #1869.
Zev Benjamin: That sounds like a reasonable explanation. The disk IO can be expensive
(imported from commit d9090daee1f81cad76c430de0956f9bd504da075)
Handled by the queue processor for signups. Added a management command
that accomplishes the same task, in case it's needed for manually added users,
or in case we goof and need to remove queued emails for a given user.
This addresses Trac #1807
(imported from commit 6727b82a07fa6a3ea3d827860c9e60fd0602297a)
We want to avoid opening a DB connection in the markdown thread
as its DB connection might live for a long time
(imported from commit 7700b2ca793ee5e9add7f071b92f22a4bf576b3d)
This will hopefully incentivize people to click one and get back into
the app.
We'll also need this for digest emails.
(imported from commit 57191c3fcca3b12df93a81e4692bb7eb8ccc83b2)
This requires renaming the account in Google Apps at the time we
deploy this; we'll probably want to do this during off hours to avoid
any user-visible downtime.
This also updates some related email addresses.
(imported from commit fce7629b359a4f278bbf7815c8d177a8fa0484fe)
This may require just doing an mv on the home directory, plus changing
the home directory in /etc/passwd. It should of course be done carefully.
(imported from commit 660997d897ee6d33563af74f0fc5d4267a911755)
A few "slow" tests aren't as slow any more, for whatever reason,
so we're setting a higher bar going forward.
(imported from commit 642137cebb7826f4512b5635da9d7b75bd5c35f4)
The text of manual links are already AtomicStrings, so linkified strings
should be too.
Moves emoji detection to happen after linkification, so the emoji rule
won't look at links.
(imported from commit 9c56bce6a0e873b398255e0762dfb312a4a9a64e)
InlinePatterns should return None on failure, not text that may
have placeholders in it.
(imported from commit f9d8d22b2b8cfa7a92ecf3e52a6c76b48e6f0175)
We want the UserActivity.query field to reflect the name of the
function for REST calls, not the URL, and we accomplish this by
setting request._query to target_function.__name__.
(imported from commit 9df05fef0dffb34483b182b95f8cbc4409083eed)
If request._query is set in the call to update_user_activity(),
we will use that instead of request.META['PATH_INFO'] for
the query field of the UserActivity row we write.
(imported from commit fcee30098e1c7c5cb4195a1e5905fc7b88af804f)
This results in some small behavior changes. First, if a user
has both malformed JSON and an invalid API key, they will now
be informed of the invalid API key, not the malformed JSON,
because the decorator wrapping code executing first. Second,
we call process_client(), which basically builds us a
UserActivity record with the client "API".
(imported from commit fadb523db9bdc82984bdae61833c5c99f1ebd1c0)
This is for webhook API endpoints that only get passed in an api_key,
not an email. An example would be api_jira_webhook, and some of
the code is borrowed from there. The rest of the code is from
authenticated_api_view().
(imported from commit b5b2a4ea52f9b317f00357ef3142c76534fabf20)
Add the number of person-minutes for the last 24 hours to the
realm report on the main tab of /activity.
(imported from commit 2ff46eacc4c8276ab0407fc6ff9f28f5137f1ed2)
Steve Howell
Leo Franchi
Tim Abbott
Zev Benjamin
acrefoot
Luke Faraone
Jessica McKellar
Kevin Mehall