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- Newsgroups: comp.unix.aix
- Path: sparky!uunet!cs.utexas.edu!geraldo.cc.utexas.edu!portal.austin.ibm.com!awdprime.austin.ibm.com!fberry!dgogates
- From: dgogates@fberry ()
- Subject: Re: /usr performance for 220's
- Sender: news@austin.ibm.com (News id)
- Message-ID: <Bzrn9B.Jvu@austin.ibm.com>
- Date: Thu, 24 Dec 1992 13:39:11 GMT
- References: <1992Dec22.221251.28368@cc.gatech.edu> <Bzox55.JMH@cantua.canterbury.ac.nz> <1h9jkmINNia7@unidui.uni-duisburg.de>
- Organization: IBM, Austin
- Lines: 28
-
- In article <1h9jkmINNia7@unidui.uni-duisburg.de> michael@hal6000.thp.Uni-Duisburg.DE (Michael Staats) writes:
- >davis@chem.canterbury.ac.nz (John Davis) writes:
- >
- >>I've found that the default size transmit and receive queues pretty
- >>much throttles NFS performance (like 50K/s max read rate). Upping them
- >>to their max (default is 30 for both, max is 150 ) helps a lot - doing
- >>that we got more like 500K/s max read speed, but write speed is still
- >>a very low 150K/s. What's odd is that this _wasn't_ happening
- >>under 3.1.6, we had the default size queues and we were getting
- >>MUCH higher throughput ( 800K/s on read, 600K/s on writes).
- >
- >Sounds very good. But how do I set the queue size?
- >Options rsize and wsize to mount?
- >
- >Thanks for your help,
- >Michael
- >--
-
- The queue size refered to here is the transmit queue size for the
- ethernet device. Using SMIT select devices/communication devices/ent0/
- change. You will see that the queue sizes for receive and xmit are
- both 30. Changes to xmit to 45. TCP and NFS must be down, otherwise
- you cannot change parms for the device. Omce again though , you must
- get PTF U410209, otherwise you will still have performance problems.
- --
- Dale Gogates | ..taliesin!gowright!dgogates
- Views expressed are MINE | ..dogface!hitex!gowright!dgogates
- | @ibmpa.awdpa.ibm.com:dgogates%byu.austin.ibm.com
-