Benoit Tellier created JAMES-4110:
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Summary: Treat UID <-> MSN mapping as a cache
Key: JAMES-4110
URL: https://issues.apache.org/jira/browse/JAMES-4110
Project: James Server
Issue Type: Improvement
Components: IMAPServer
Reporter: Benoit Tellier
This issue is to record a performance optimization discussed at FOSDEM 2025
with Mauro, the authoer of the Stallwart labs mail server.
He encountered similar difficulties regarding memory constraints of the UID <->
MSN mapping but approched it as a cache.
He would load upfront the mapping but ensures he only keeps a pool of most
recent active mappings, reloading the mappings as needed.
If we identify that memory on IMAP connection is a constraint, and that il
mostly suffers from IDLE connections then we could implement a similar approach.
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