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IMAP THREAD REFERENCE and SORT Performance Degradation (Doc ID 1405263.1)

Last updated on APRIL 29, 2021

Applies to:

Oracle Communications Messaging Server - Version 7.0.4 and later
Information in this document applies to any platform.
Affects IMAP email clients that utilize the REFERENCES" algorithm when using the IMAP THREAD extension.


IMAP searches that utilize the IMAP thread extension with the REFERENCES algorithm can experience a performance degradation with mailboxes that contain 6000 or more messages.

An example of the scale:

No. of emails Threading Time Taken
2250 3.75 sec
4500 3.75 sec
6700 15 sec
9000 20 sec
14000 26 sec
18000 30 sec




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