Re: Bad NFS performance with Linux.. please help

From: Eyal Traitel (etraitel@yahoo.com)
Date: Sat Aug 12 2000 - 04:54:53 EDT

  • Next message: Chris Good: "Re: Bad NFS performance with Linux.. please help"

    I can suggest you to check:

    1. Network cards and switches/routers between the Linuxes and the
       filers - check for 100mbit full duplex settings - check in the
       filer and the linux for nfsstat and netstat errors.
    2. I don't have experience with NFS on linux, but I know that there
       were a lot of nfs changes in the last kernels, so even if it
       worked OK before, maybe you should just consider to upgrade the
       linuxes - it is never bad in linux anyway... :)
       You'll probably get faster NFS that way, since nfs was moved to
       kernel level I think in 2.3 or something...

    Eyal.

    --- Henrique Pantarotto <henrique@corp.terra.com.br> wrote:
    > Hello toaster friends!
    >
    > This week I experienced a very strange NFS performance in our POP3
    > servers.
    > We've 4 POP3 Linux clients mouting 2 netapp boxes, like this:
    >
    > /var/spool/mail1 - F760 (cluster)
    > /var/spool/mail2 - F760 (cluster)
    > /var/spool/pop - F720
    >
    > Our Linux clients are Pentium III 650Mhz Dual with 1GB RAM running a
    > Red
    > Hat-like distribution with Kernel 2.2.14-19smp.
    >
    > This solution has worked very fine until this week, when we started
    > experiencing high Load Average in our Linux boxes and accumulation of
    > pop
    > processes.
    >
    > Copies from /var/spool/mail to /var/spool/pop are verrrrrrrrry
    > slowwwwwwwwww... so pop processes get status of "D" (Disk Waiting
    > right?,
    > and caos takes place.
    >
    > I don't know what it is. We're crazy here...
    >
    > Anyone has ever had hard times like this before with Linux?
    >
    >
    > Thanks a lot for any help!!!!!!!
    >
    > PS: We've Brazilian NetApp guys giving us a hand here.
    >
    >
    > Regards,
    > _______________________________________________
    > Henrique Pantarotto
    > SysOp Site São Paulo
    > Terra Networks Brasil S/A
    > A Internet mais sua do que nunca
    > Tel: (11) 5505-5728 r.316/238 ICQ: 6934285 IT: henpa
    > henrique@corp.terra.com.br
    >

    =====
    Yours,
    Eyal Traitel
    eTraitel@yahoo.com, Home: 972-3-5290415 (Tel Aviv)
    *** eTraitel - it's the new eBuzzword ! ***

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