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Date:      Wed, 23 Jan 2019 16:34:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 231457] Out of swap space on ZFS
Message-ID:  <bug-231457-227-pAMbyiPK59@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-231457-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-231457-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231457

Billg <alaa.alassafin@card-1.com> changed:

           What    |Removed                     |Added
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                 CC|                            |alaa.alassafin@card-1.com

--- Comment #13 from Billg <alaa.alassafin@card-1.com> ---
I'm having the same behavior with freeBSD 11.2 p8. Although swap partition is
not on zfs, we do however have a zfs pool on this machine as described here :
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235125

I tried memphage

total memory is 128GB 
Free memory at the time I started the memphage was 110 GB
Swap 8GB

./memphage 115000 took around 3 minutes with no issues.swap got 3.2 GB filled.

./memphage 120000 took 5 minutes and got killed at 118672Mb

swap was completely filled and got multiple :
Jan 23 14:56:27 san2 kernel: swap_pager_getswapspace(2): failed

and then memphage got killed.

Jan 23 14:56:48 san2 kernel: pid 6945 (memphage), uid 0, was killed: out of
swap space
Jan 23 14:56:48 san2 kernel: Jan 23 14:56:48 san2 kernel: pid 6945 (memphage),
uid 0, was killed: out of swap space

--
No other processes were killed this time. only memphage

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