Date: Thu, 29 Aug 2013 10:16:33 -0400 From: "Sam Fourman Jr." <sfourman@gmail.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: NFS on ZFS pure SSD pool Message-ID: <CAOFF%2BZ0SRDUNuaT73e4jU%2BFZESR35OS8Vo9cU-bV2-zn-HhWDw@mail.gmail.com> In-Reply-To: <1079189088.15197172.1377784177805.JavaMail.root@uoguelph.ca> References: <CAOFF%2BZ3jNvnWbE5C8LarRE7-SQbB4Q9NJTn01J=FGP9uppKdaw@mail.gmail.com> <1079189088.15197172.1377784177805.JavaMail.root@uoguelph.ca>
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On Thu, Aug 29, 2013 at 9:49 AM, Rick Macklem <rmacklem@uoguelph.ca> wrote: > Sam Fourman Jr wrote: > > > > > > > > > > > > > > On Wed, Aug 28, 2013 at 2:27 PM, Eric Browning < > > ericbrowning@skaggscatholiccenter.org > wrote: > > > > > > Rick, > > > > Sam and I applied the patch (kernel now at r254983M) and set > > vfs.nfsd.tcphighwater=5000 > > in sysctl.conf and my CPU is still slammed. SHould I up it to 10000? > > > > > > > > > > > > > > Hello, list > > I am helping Eric debug and test this situation as much as I can. > > > > > > So to clarify and recap, here is the situation: > > > > > > > > This is a production setting, in a school, that has 200+ students > > using a mix of systems,with the primary client being OSX 10.8. > > and the primary function is using NFS. > > > I haven't touched a Mac in several years, but I think Finder probes at > regular intervals to see if directories (oops, I meant folders;-) have > changed. I think there is a way to increase the interval time between > probes. > Also, I think there are tunables for the metadata cache in ZFS, which > might be useful for increasing the metadata cache sizes, since the probes > will be checking metadata (attributes). > > Can does anyone here on the list, have clues on where to start with ZFS metadata turntables, and a command or two to profile the kernel for CPU usage? I'm willing to read up on kernel profiling as well, I'm just not sure where to start > -- Sam Fourman Jr.
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