Ghost/ghost/core
Kevin Ansfield d5a9731845
Fixed email_recipients indexes to match query usage (#19918)
closes https://linear.app/tryghost/issue/ENG-791/migration-to-fix-email-recipients-indexes

Our indexes over single columns (`delivered_at`, `opened_at`, `failed_at`) were ineffective because the only time we query those is alongside `email_id` meaning we were frequently performing full table scans on very large tables during our email analytics jobs.

- added migration to add new indexes covering `email_id` and the respective columns
- added migration to drop the old indexes that weren't being used in any query plans

Local runtime with ~2M email_recipient rows:
- before: 1.7s
- after: 99ms

Explain output...

before:
```
+----+-------------+------------------+------------+-------+----------------------------------------------------------------------------------+----------------------------------------------+---------+-------+--------+----------+------------------------------------+
| id | select_type | table            | partitions | type  | possible_keys                                                                    | key                                          | key_len | ref   | rows   | filtered | Extra                              |
+----+-------------+------------------+------------+-------+----------------------------------------------------------------------------------+----------------------------------------------+---------+-------+--------+----------+------------------------------------+
|  1 | UPDATE      | emails           | NULL       | index | NULL                                                                             | PRIMARY                                      | 98      | NULL  |      1 |   100.00 | Using where                        |
|  4 | SUBQUERY    | email_recipients | NULL       | range | email_recipients_email_id_member_email_index,email_recipients_failed_at_index    | email_recipients_failed_at_index             | 6       | NULL  |   2343 |     7.76 | Using index condition; Using where |
|  3 | SUBQUERY    | email_recipients | NULL       | ref   | email_recipients_email_id_member_email_index,email_recipients_opened_at_index    | email_recipients_email_id_member_email_index | 98      | const | 159126 |    50.00 | Using where                        |
|  2 | SUBQUERY    | email_recipients | NULL       | ref   | email_recipients_email_id_member_email_index,email_recipients_delivered_at_index | email_recipients_email_id_member_email_index | 98      | const | 159126 |    50.00 | Using where                        |
+----+-------------+------------------+------------+-------+----------------------------------------------------------------------------------+----------------------------------------------+---------+-------+--------+----------+------------------------------------+
```

after:
```
+----+-------------+------------------+------------+-------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------+---------+------+--------+----------+--------------------------+
| id | select_type | table            | partitions | type  | possible_keys                                                                                                                                                                 | key                                          | key_len | ref  | rows   | filtered | Extra                    |
+----+-------------+------------------+------------+-------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------+---------+------+--------+----------+--------------------------+
|  1 | UPDATE      | emails           | NULL       | index | NULL                                                                                                                                                                          | PRIMARY                                      | 98      | NULL |      1 |   100.00 | Using where;             |
|  4 | SUBQUERY    | email_recipients | NULL       | range | email_recipients_email_id_member_email_index,email_recipients_email_id_delivered_at_index,email_recipients_email_id_opened_at_index,email_recipients_email_id_failed_at_index | email_recipients_email_id_failed_at_index    | 104     | NULL |     60 |   100.00 | Using where; Using index |
|  3 | SUBQUERY    | email_recipients | NULL       | range | email_recipients_email_id_member_email_index,email_recipients_email_id_delivered_at_index,email_recipients_email_id_opened_at_index,email_recipients_email_id_failed_at_index | email_recipients_email_id_opened_at_index    | 104     | NULL | 119496 |   100.00 | Using where; Using index |
|  2 | SUBQUERY    | email_recipients | NULL       | range | email_recipients_email_id_member_email_index,email_recipients_email_id_delivered_at_index,email_recipients_email_id_opened_at_index,email_recipients_email_id_failed_at_index | email_recipients_email_id_delivered_at_index | 104     | NULL | 146030 |   100.00 | Using where; Using index |
+----+-------------+------------------+------------+-------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------+---------+------+--------+----------+--------------------------+
```
2024-04-03 17:52:52 +01:00
..
content 🎨 Updated Source to v1.2.1 2024-03-15 16:04:57 +00:00
core Fixed email_recipients indexes to match query usage (#19918) 2024-04-03 17:52:52 +01:00
test Fixed email_recipients indexes to match query usage (#19918) 2024-04-03 17:52:52 +01:00
.c8rc.e2e.json Split CI database tests into separate types 2023-05-22 19:34:17 +02:00
.c8rc.json Added email address alignment protections (#19094) 2023-11-23 10:25:30 +01:00
.eslintignore Updated .eslintignore list for core 2022-10-10 15:12:52 +07:00
.eslintrc.js Updated linting and migration comment to improve practices 2023-06-26 15:29:37 +02:00
.npmignore Moved monobundle into monorepo 2023-11-13 13:30:38 +01:00
config.development.json Converted Ghost repo into a monorepo 2022-07-20 16:41:05 +02:00
ghost.js Added browser-based testing framework 2022-11-22 14:12:34 +00:00
index.js Removed NewRelic from Ghost 2024-03-18 15:22:33 +01:00
jsconfig.json Deleted reference to core/admin 2022-08-03 16:28:41 +02:00
loggingrc.js Added version information to log lines 2023-01-20 13:18:44 +01:00
MigratorConfig.js Added eslint rule for file naming convention 2023-05-09 12:34:34 -04:00
monobundle.js Moved monobundle into monorepo 2023-11-13 13:30:38 +01:00
package.json Update sentry-javascript monorepo to v7.109.0 2024-04-01 14:10:07 +02:00
playwright.config.js 🐛 Fixed flaky browser tests (#19929) 2024-03-27 13:57:53 -05:00