mirror of https://github.com/zulip/zulip.git
3518d31797
This is designed to help PostgreSQL have better specificity and locality in its indexes. Subsequent commits will adjust the code to make sure that we use these indexes rather than the `realm_id`-less versions. We do not add a `realm_id` variation to the full-text index, since it is a GIN index; multi-column GIN indexes are not terribly performant, require the `btree_gin` extension for `int` types (which requires superuser privileges on PostgreSQL 12 and earlier), and cannot be consistently added concurrently on running instances. After all indexes have been made, we also run `CREATE STATISTICS` in order to give PostgreSQL the opportunity to realize that recipient and sender are highly correlated with message realm, allowing it to estimate that `(realm_id, recipient_id)` is likely as specific as matching a given `recipient_id`, instead of as likely as matching `realm_id` times matching a `recipient_id`. Finally, those statistics must be filled by `ANALYZE zerver_message`, which is run last. |
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| .. | ||
| actions | ||
| data_import | ||
| integration_fixtures/nagios | ||
| lib | ||
| management | ||
| migrations | ||
| openapi | ||
| tests | ||
| tornado | ||
| transaction_tests | ||
| views | ||
| webhooks | ||
| worker | ||
| __init__.py | ||
| apps.py | ||
| context_processors.py | ||
| decorator.py | ||
| filters.py | ||
| forms.py | ||
| logging_handlers.py | ||
| middleware.py | ||
| models.py | ||
| signals.py | ||