Date: Thu, 23 Oct 2008 15:16:24 -0200 From: "Eduardo Meyer" <dudu.meyer@gmail.com> To: "Jeremy Chadwick" <koitsu@freebsd.org>, stable@freebsd.org Subject: Re: gstat information on the CLI Message-ID: <d3ea75b30810231016o160bac81o6591b0b2d8421d92@mail.gmail.com> In-Reply-To: <20081023155208.GA90330@icarus.home.lan> References: <d3ea75b30810230720uef21cfft17b5c63507022482@mail.gmail.com> <20081023145054.GA88957@icarus.home.lan> <d3ea75b30810230811h66ae957ej2e0afcb31fac8519@mail.gmail.com> <20081023155208.GA90330@icarus.home.lan>
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On Thu, Oct 23, 2008 at 1:52 PM, Jeremy Chadwick <koitsu@freebsd.org> wrote: > On Thu, Oct 23, 2008 at 01:11:55PM -0200, Eduardo Meyer wrote: >> On Thu, Oct 23, 2008 at 12:50 PM, Jeremy Chadwick <koitsu@freebsd.org> wrote: >> > On Thu, Oct 23, 2008 at 12:20:45PM -0200, Eduardo Meyer wrote: >> >> Hello, >> >> >> >> Its me again bothering you with basic things I cant accomplish. >> >> >> >> I am planning on monitoring my disks, and the most important >> >> information for me is thorughput and lengh queue of operations. I can >> >> get the first information with iostat -w1 and sorta, which is perfect >> >> for scripting. >> >> >> >> However, I also need the L(q) information which FreeBSD gives me with >> >> gstat. However, this curses interface wont allow me to use grep+awk to >> >> get the information I need for the device (slices and disks, but not >> >> labels) I need. >> > >> > Can you tell me what the L(q) field actually represents in gstat? >> > >> > The BUGS section of the gstat man page should indirectly answer your >> > other question (re: non-curses). >> >> Yes, I have read that. I am looking the source code for gstat. Its >> simple, small and clear. I guess can be asily modified to have what I >> want :) >> >> >> So I ask, how can I get this information other than gstat? Or, can >> >> gstat work in non-interactive mode? >> > >> > iostat -x should provide what you're looking for. And remember, the >> > first sample data shown in iostat should be generally discarded. >> >> I need the queue lengh of pending disk operations. What L(q) shows is >> the lengh queue, the queued number of pending operations (I believe). > > It isn't documented, so I really have no idea what it means, hence my > question. I'm curious why you're interested in that number; why does it > matter? > > iostat -x provides the same kind of value, and you won't have to modify > any code to get what you need: > > wait transactions queue length Jeremy, thank you. They show the same information, reading the code I see both show DSM_QUEUE_LENGHT from devstat_compute_statistics(). Thanks again :) -- =========== Eduardo Meyer pessoal: dudu.meyer@gmail.com profissional: ddm.farmaciap@saude.gov.br
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