Couchbase log--expiration value log

Couchbase Server
1

when the expiration value expire,where can i find the log. “/opt/couchbase/var/lib/couchbase/logs/couchdb.1” only contain web console log.
i use c SDK.

2

Hello,

AFAIK the expiration of keys are not logged.

Regards
Tug
@tgrall