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Date:      Wed, 21 Nov 2018 17:53:06 +0300
From:      Lev Serebryakov <lev@FreeBSD.org>
To:        Eugene Grosbein <eugen@grosbein.net>, 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:  <807023120.20181121175306@serebryakov.spb.ru>
In-Reply-To: <92e3ea2e-b7ed-ec26-c56b-2d2acbf41772@grosbein.net>
References:  <e2422965-0890-2d15-4716-0a31426b0a66@FreeBSD.org>  <20181120204537.GB2630@raichu> <1999292077.20181121135618@serebryakov.spb.ru> <123493949.20181121143445@serebryakov.spb.ru> <baf85324-0d6d-bd4b-385d-8280bc7a93a3@grosbein.net> <228548325.20181121170325@serebryakov.spb.ru> <92e3ea2e-b7ed-ec26-c56b-2d2acbf41772@grosbein.net>

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Hello Eugene,

Wednesday, November 21, 2018, 5:19:32 PM, you wrote:

>>  It is more likely that there is a bug in "priority" for memory
>> distribution: abd FREE memory has higher priority than ARC somehow.
> OTOH, if "abd_chunks" part of ZFS ARC is not released to the UMA
> from which it was allocated (to be reused by other parts of the kernel)
> but is reused by ZFS itself, then top(1) should report it as part of ZFS ARC
> and not as other "Wired" memory.
 It will be better to system use this memory for ARC and not as "Free" chunks for
future usage :-)


-- 
Best regards,
 Lev                            mailto:lev@FreeBSD.org




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