From owner-freebsd-net@freebsd.org  Tue Jan  9 08:45:03 2018
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Subject: Re: swap_pager_getswapspace(32) Error
To: wishmaster <artemrts@ukr.net>, freebsd-net@freebsd.org,
 freebsd-stable <freebsd-stable@freebsd.org>
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From: Eugene Grosbein <eugen@grosbein.net>
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Date: Tue, 9 Jan 2018 15:44:36 +0700
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09.01.2018 14:11, wishmaster wrote:

> Jan  5 09:49:40 server kernel: swap_pager_getswapspace(32): failed
> Jan  5 09:49:40 server kernel: swap_pager_getswapspace(24): failed
> Jan  5 09:49:40 server kernel: swap_pager_getswapspace(18): failed

[skip]

This has nothing to do with netgraph, dummynet or ipfw.

> Without netgraph/dummynet rules I see in top -HSP a lot of processes of MySQL. But innodb_buffer_pool_size is just 2GB. Server has 16GB RAM.
> 
> PID USERNAME   PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
> 
> 11570    106      20    0   570M   516M select  3   0:38   0.00% clamd{clamd}
> 11570    106      20    0   570M   516M select  1   0:00   0.00% clamd{clamd}
> 10612     88      20    0  2909M   451M uwait   3   0:07   0.01% mysqld{mysqld}
> 10612     88      20    0  2909M   451M uwait   3   0:04   0.01% mysqld{mysqld}
> .....
> 
> uname -a 
> FreeBSD server 11.1-STABLE FreeBSD 11.1-STABLE #0 r325503: Tue Nov  7 13:38:44 EET 2017     wishmaster@servers:/usr/obj/usr/src/sys/MY  amd64

Have you configured any swap partitions for the server?