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Full Discussion: Gurus needed to diagnose severe performance degradation
Top Forums UNIX for Advanced & Expert Users Gurus needed to diagnose severe performance degradation Post 302349783 by achenle on Tuesday 1st of September 2009 07:38:08 PM
Old 09-01-2009
A 66MHz, 64-bit PCI bus can handle 4 gbps, so unless it's a badly-engineered bus, that shouldn't be your problem.

Also, do NOT remove the autonegotiate feature from your network cards and switches if you're running gigE over copper.

1. If your links are not running at 1000 mbps, full-duplex, there's a problem. Papering over that underlying problem by forcing the link to 1000 mpbs full-duplex doesn't fix the problem.

2. Disabling autonegotiation on copper gigE places you outside the specifications of IEEE 802.3: (http://www.sun.com/blueprints/0704/817-7526.pdf)

Quote:
The IEEE 802.3 standard states that you must support and test autonegotiation enabled to certify a product IEEE 802.3 compliant, and for multivendor interoperability (for example, testing at the UNH Interoperability Laboratory). There are no requirements in the standard to support locked down or forced configurations using autonegotiation disabled. As a result, there are no requirements for vendors to test multivendor interoperability between products with autonegotiation disabled.

The IEEE 802.3ab specification does not allow for forced mode 1000BASE-T with autonegotiation disabled running at 1000 Mbps. As a result, many switch vendors do not support forced mode.
I'd look to be sure you do all the tuning that Oracle advises for running over NFS. Especially make sure you're using jumbo frames.

And you might very well need to look into replacing your old hardware and software. There have been a lot of hardware and software advances in networking performance since Solaris 9 was current.
 

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LEARN ABOUT OSF1

ee

ee(7)							 Miscellaneous Information Manual						     ee(7)

NAME

       ee - Intel (82558/28559) PCI 10/100 Ethernet

SYNOPSIS

       config_driver ee

DESCRIPTION

       The  ee	interface supports the Intel 82558 and 82559-based Compaq adapters (including the DE60x line of adapters).  These PCI bus adapters
       support standard 10/100 Ethernet operation, and provide equivalent service compared to the DE500-BA adapters (IEEE 802.3u  Autonegotiation,
       full/half  duplex,  10/100  Mbps).   In	addition  to the standard features, the Compaq adapters support a hardware feature called parallel
       detection.  This feature detects speed (10/100) and mode (full/half duplex) automatically when connecting to a  repeater/switch	that  does
       NOT perform IEEE 802.3u Autonegotiation.

       By  default,  the  driver  uses	Autonegotiation mode.  This mode either connects to the remote partner with IEEE 802.3u Autonegotiation or
       resolves the speed and mode using parallel detection.  The adapters are designed to automatically connect  to  all  network  configurations
       without	manual intervention.  However, if manual intervention is required, lan_config operations are supported (see lan_config(8) for more
       information).  If you want to preserve  your lan_config command information across system  restarts,  edit  the	/etc/inet.local  file  and
       include the appropriate commands. This information also remains the same through system version updates.

       This driver does NOT require new console firmware to operate in a runtime only manner.  Tru64 UNIX does not use console variables to define
       media, mode, or speed.  Booting over a network requires SRM firmware Version 5.5 or later (on most platforms).

ERRORS

       The following diagnostic error messages contain relevant information provided by the ee interface, and are printed on  the  console.   Each
       message	begins	with  the  adapter  identification,  including	the unit number of the adapter.  The ee driver found a system that has not
       defined cachelinesize in the PCI configuration header.  This is an informational message only, and the driver correctly defines the  cache-
       linesize  parameter.   Not enough free memory exists to run the driver.	The EEPROM on the board did not pass the checksum test.  The board
       indicated in this message is unusable.  The device did not pass self test.  The diagnostic test that failed follows immediately after  this
       message.  The board indicated in this message is unusable.

RELATED INFORMATION

       Commands: lan_config(8)

       Files: inet.local(4) delim off

																	     ee(7)
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