Date: Thu, 5 Apr 2018 20:18:12 +0500 From: "Eugene M. Zheganin" <eugene@zhegan.in> To: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: TRIM, iSCSI and %busy waves Message-ID: <0e408973-375e-9489-77c5-b2bd2e2d1a87@zhegan.in> In-Reply-To: <CANCZdfrQBqcb5ASPFGjLN=nif4bQ9vTjMtBuDaOvvUKkM7u3XA@mail.gmail.com> References: <92b92a3d-3262-c006-ed5a-dc2f9f4a5cb9@zhegan.in> <CANCZdfrQBqcb5ASPFGjLN=nif4bQ9vTjMtBuDaOvvUKkM7u3XA@mail.gmail.com>
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Hello, On 05.04.2018 20:00, Warner Losh wrote: > > I'm also having a couple of iSCSI issues that I'm dealing through > bounty with, so may be this is related somehow. Or may be not. Due > to some issues in iSCSI stack my system sometimes reboots, and > then these "waves" are stopped for some time. > > So, my question is - can I fine-tune TRIM operations ? So they > don't consume the whole disk at 100%. I see several sysctl oids, > but they aren't well-documented. > > > You might be able to set the delete method. Set it to what ? It's not like I'm seeing FreeBSD for the first time, but from what I see in sysctl - all of those "sysctl -a | grep trim" oids are numeric. > > P.S. This is 11.x, disks are Toshibas, and they are attached via > LSI HBA. > > > Which LSI HBA? > A SAS9300-4i4e one. Eugene. Thanks.
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