From owner-freebsd-questions@freebsd.org  Thu Feb 15 07:41:58 2018
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To: FreeBSD Mailing List <freebsd-questions@freebsd.org>
From: Per olof Ljungmark <peo@nethead.se>
Subject: which limit is hit here?
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Date: Thu, 15 Feb 2018 08:41:48 +0100
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Hi,

A process "squatter" from Cyrus-IMAP version 2.5.11 exits with signal
11. The purpose of the process is to create an index of the content in a
mailbox.

On large mailboxes, squatter coredumps, the final message from truss reads:

mmap(0x0,700448768,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) =
34783363072 (0x819400000)
mmap(0x0,936334732,PROT_READ,MAP_SHARED,107,0x0) = 35483811840 (0x843000000)
SIGNAL 11 (SIGSEGV)
process killed, signal = 11 (core dumped)

and a tempfile is produced, always same size:
3017208832 cyrus.squat.NEW

Same result on 10.3 and 11-STABLE.

Is there a knob to let squatter have the necessary resource to complete
the indexing?

Thanks,

//per