Testing high usage big mailbox: search via webmail is slow and takes up a lot of CPU (only 1 mailbox !!!)
Problem reported by Gabriele Maoret - SERSIS - 10/16/2020 at 7:38 AM
As title says, I'm tasting the usage of a big mailbox (it's the import of my mailbox...)...

If I wanto to do a search via webmail, the search itself is very slow and takes very long time, and the CPU usage is very high (only 1 mailbox is used in this test!!!).

These are images after 2 minutes after searching started (CPU is a Intel Xeon E-2136 and the storage is on Samsung Enterprise nVME SSD...):

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Gabriele Maoret - SERSIS Replied
Retried the same search a second time and it was almost instant ...

The first time it took about 2 minutes.

I tried again after restarting the Server and again it took a long time the first time and then it was very fast the second ...

It's normal?

In Outlook and in Exchange webmail (where I come from) it's always very fast ...

I can't tell users that webmail searches will often be that slow, otherwise I'll have a lot of complaints!
Gabriele Maoret - SERSIS Replied
Also, if a single user's webmail search uses so much CPU, I can't imagine what will happen when I have 100 users ...

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