[THIN] Re: Office 2003 applications hang
- From: "Ruben Spruijt" <Ruben.Spruijt@xxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Wed, 25 Jan 2006 21:56:11 +0100
Hi Jeff,
It's not this issue ..? (below)
Ruben
> > If you have any Servers with HP NC7781 NIC's installed (Hp DL
> 380's, DL 360's and others), you may experience excessive
> retransmits, Outlook hangs, file copy performance issues, cluster
> failovers, etc.
> >
> > Cause:
> > The driver defaults to "Offload TCP transmit Checksum"
and "Offload
> Ip Transmit
> > Checksum". This is a performance enhancement designed to relieve
> the TCP and IP
> > components of the IP checksum calculation overhead and assign that
> duty to the NIC.
> > Normally this is a preferred method of operation. The HP NC7781
> NICS periodically
> > miscalculate the TCP checksum. This causes connection timeouts
> periodically and
> > more importantly, Outlook hangs between 10 and 20 seconds. With
the
> latest firmware
> > and drivers installed, the issue is still prevalent. The box that
> receives a
> > response with an incorrectly calculated checksum simply throws the
> malformed
> > response away, never delivering the data to the application.
> > Resolution:
> > In the Netcard driver configuration dialog box, disable Offload
> checksum
> > calculations. This will allow the TCP and IP components to
> calculate their own
> > checksums.This change does not require a reboot or involve a
> service interruption, normal
> >
> > change control procedures should of course, always be followed!
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