[Dovecot] dovecot/lmtp munmap()-ing a lot

[Ralf Hildebrandt]

* Timo Sirainen <tss at iki.fi>:

> > Why would that happen? (dovecot 2.1.17)
> 
> Difficult to say. It could be munmap()ing memory allocations or it
> could be munmap()ing Dovecot index files. Weren't there equivalent
> number of mmap() calls?..
> 
> BTW. In v2.2 the index file handling is faster for LDA/LMTP because it
> doesn't even try to mmap() the full indexes into memory.

That's probably the problem here. The user had LOTS of (duplicate!)
mails in his inbox.

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