Tran Hong Quan created JAMES-3940:
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Summary: Set up TTL on mailbox_change and email_change
Key: JAMES-3940
URL: https://issues.apache.org/jira/browse/JAMES-3940
Project: James Server
Issue Type: Improvement
Components: cassandra, JMAP
Affects Versions: master
Reporter: Tran Hong Quan
Assignee: Antoine Duprat
Why: Today the changes takes 1.8GB out of 20GB Cassandra database.
```
Table: email_change
SSTable count: 10
Old SSTable count: 0
Space used (live): 1458287826
Table: mailbox_change
SSTable count: 6
Old SSTable count: 0
Space used (live): 321767927
```
Changes serves resynchronisation, and is used up resonnably quickly. Once used,
those can be discarded as not useful anylonger.
=> TTL value: 2 month (default value - configurable)
Note that if missing this is handled well (`cannotCalculateChanges`)
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