Archived Journal Files Do Not Compact as Documented about kestrel

[DavidFishman]

To further illustrate the issue (and explain why it may not have been caught given the default configuration):

With a default of maxMemorySize=128mb and defaultJournalSize=16mb, we have a low risk of hitting this case as we're likely to have a current journal file size that is greater than 16mb by the time the queue length = 0 (since rotation occurs when the current journal file size is greater than the maxMemorySize). However, as the difference between these numbers decreases, we become more likely to to have a current journal file that is less than the defaultJournalSize when the queue length = 0.

More so, if defaultJournalSize>maxMemorySize the journal file will never be compacted when the queue length = 0, (since rotation would occur at a file size less than the defaultJournalSize, making it impossible for the current journal file size to ever be greater than the defaultJournalSize).

[eric]

👍 Thanks for tracking this down! I've observed the behavior before but haven't had a chance to dig into why.