Date: Thu, 22 Nov 2018 16:33:26 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Mark Johnston <markj@freebsd.org> Cc: FreeBSD FS <freebsd-fs@freebsd.org>, FreeBSD stable <freebsd-stable@freebsd.org> Subject: Re: Where is my memory on 'fresh' 11-STABLE? It should be used by ARC, but it is not used for it anymore. Message-ID: <6c41605a-81b4-c436-6114-98f1c802fbd3@FreeBSD.org> In-Reply-To: <20181120204537.GB2630@raichu> References: <e2422965-0890-2d15-4716-0a31426b0a66@FreeBSD.org> <20181120204537.GB2630@raichu>
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From: Lev Serebryakov <lev@FreeBSD.org>
Reply-To: lev@FreeBSD.org
To: Mark Johnston <markj@freebsd.org>
Cc: FreeBSD FS <freebsd-fs@freebsd.org>,
FreeBSD stable <freebsd-stable@freebsd.org>
Message-ID: <6c41605a-81b4-c436-6114-98f1c802fbd3@FreeBSD.org>
Subject: Re: Where is my memory on 'fresh' 11-STABLE? It should be used by
ARC, but it is not used for it anymore.
References: <e2422965-0890-2d15-4716-0a31426b0a66@FreeBSD.org>
<20181120204537.GB2630@raichu>
In-Reply-To: <20181120204537.GB2630@raichu>
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On 20.11.2018 23:45, Mark Johnston wrote:
>> Where is other 11G of memory?!
>>
>> I've checked USED and FREE in "vmstat -z" output and got this:
>>
>> $ vmstat -z | tr : , | awk -F , '1{print $2*$4,$2*$5,$1}' | sort -n |
>> tail -20
>> 23001088 9171456 MAP ENTRY
>> 29680800 8404320 VM OBJECT
>> 34417408 10813952 256
>> 36377964 2665656 S VFS Cache
>> 50377392 53856 sa_cache
>> 50593792 622985216 zio_buf_131072
>> 68913152 976896 mbuf_cluster
>> 73543680 7225344 mbuf_jumbo_page
>> 92358552 67848 zfs_znode_cache
>> 95731712 51761152 4096
>> 126962880 159581760 dmu_buf_impl_t
>> 150958080 233920512 mbuf_jumbo_9k
>> 165164600 92040 VNODE
>> 192701120 30350880 UMA Slabs
>> 205520896 291504128 zio_data_buf_1048576
>> 222822400 529530880 zio_data_buf_524288
>> 259143168 293476864 zio_buf_512
>> 352485376 377061376 zio_buf_16384
>> 376109552 346474128 dnode_t
>> 2943016960 5761941504 abd_chunk
>> $
>>
>> And total USED/FREE numbers is very strange for me:
>>
>> $ vmstat -z | tr : , | awk -F , '1{u+=3D$2*$4; f+=3D$2*$5} END{print u=
,f}'
>> 5717965420 9328951088
>> $ One more datapoint: I needed to reboot system and right after reboot=
ARC becomes 14GiB (what was expected) and now it slows defalate, though
I didn't get more "Free" memory. So, ARC becomes smaller and smaller
after first fill-up, but all memory is "Wired".
--=20
// Lev Serebryakov
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