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| author | Christoph Wurst <christoph@winzerhof-wurst.at> | 2022-03-28 18:13:28 +0300 |
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| committer | Christoph Wurst <christoph@winzerhof-wurst.at> | 2022-03-28 18:13:28 +0300 |
| commit | 47946fadaa03096d5124c9989d9ef47d0f698f4a (patch) | |
| tree | c9479be444efff2027f0acb9d245a0f85615d66d /doc | |
| parent | fdfce08e2a05f401e55cb30776366af6f1870e9f (diff) | |
Document how to debug slow IMAP/SMTP connections
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/admin.md | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/admin.md b/doc/admin.md index 90716eb41..827bb7796 100644 --- a/doc/admin.md +++ b/doc/admin.md @@ -82,6 +82,32 @@ Make sure to remove any sensitive data before posting it publicly. Reset log lev If Mail fails to insert new rows for messages (`oc_mail_messages`), recipients (`oc_mail_recipients`) or similar tables, you are possibly not using the 4 byte support. See [the Nextcloud Admin Manual](https://docs.nextcloud.com/server/stable/admin_manual/configuration_database/mysql_4byte_support.html) on how to update your database configuration. +### Timeout and other connectivity issues + +You can use OpenSSL to test and benchmark the connection from your Nextcloud host to the IMAP/SMTP host. + +```bash +openssl s_time -connect imap.domain.tld:993 +``` + +The output should look similar to this: + +``` +Collecting connection statistics for 30 seconds +*************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** + +483 connections in 0.94s; 513.83 connections/user sec, bytes read 0 +483 connections in 31 real seconds, 0 bytes read per connection + + +Now timing with session id reuse. +starting +***************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************** + +497 connections in 0.97s; 512.37 connections/user sec, bytes read 0 +497 connections in 31 real seconds, 0 bytes read per connection +``` + ### Get account IDs For many troubleshooting instructions you need to know the `id` of a user's account. You can acquire this through the database, but it's also possible to utilize the account export command of [occ](https://docs.nextcloud.com/server/stable/admin_manual/configuration_server/occ_command.html) if you know the UID of the user: |