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Diffstat (limited to 'docs/postgres.md')
| -rw-r--r-- | docs/postgres.md | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/docs/postgres.md b/docs/postgres.md index de4e2ba4b7..cbc32e1836 100644 --- a/docs/postgres.md +++ b/docs/postgres.md @@ -234,12 +234,13 @@ host all all ::1/128 ident ### Fixing incorrect `COLLATE` or `CTYPE` Synapse will refuse to set up a new database if it has the wrong values of -`COLLATE` and `CTYPE` set, and will log warnings on existing databases. Using -different locales can cause issues if the locale library is updated from +`COLLATE` and `CTYPE` set. Synapse will also refuse to start an existing database with incorrect values +of `COLLATE` and `CTYPE` unless the config flag `allow_unsafe_locale`, found in the +`database` section of the config, is set to true. Using different locales can cause issues if the locale library is updated from underneath the database, or if a different version of the locale is used on any replicas. -The safest way to fix the issue is to dump the database and recreate it with +If you have a databse with an unsafe locale, the safest way to fix the issue is to dump the database and recreate it with the correct locale parameter (as shown above). It is also possible to change the parameters on a live database and run a `REINDEX` on the entire database, however extreme care must be taken to avoid database corruption. |