Bug 83456 - VM issues with >= 10GB RAM
VM issues with >= 10GB RAM
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2003-02-04 11:51 EST by Larry Troan
Modified: 2016-04-18 05:39 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-09-30 11:40:29 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Larry Troan 2003-02-04 11:51:01 EST
We are seeing issues with a single tar of a large number files on a 6600
ruinging performance.

This problem appears to be the same as bugzilla 79257.

Here is the script that exposes the problem:

# Tar's and Gzip's the linux kernel source 
  cd /usr/src
  tar cvf /$TEST_DIR/linux.tar linux-2.4/*
  gzip -f /$TEST_DIR/linux.tar
# Remove any possible left over directories from a 
rm -fr linux-2.4 linux.orig linux.pass.*
# Unpack the one copy of the source tree that we will be comparing against
tar -xzf $SOURCE_FILE
mv /tmp/linux-2.4 linux.orig
  while [ "$j" -lt "$COUNT" ]; do
    tar -xzf $SOURCE_FILE
    echo "Loop $j out of $COUNT"
    echo "Extracting Source File to $TEST_DIR/linux.pass.$j"
    mv linux-2.4 linux.pass.$j
    j=`expr $j + 1`
# Clean up
rm -fr linux-2.4 linux.orig linux.pass.*

The system has 12GB and 4 Processors with HT on.  It will lock up under the
2.4.18-14bigmem kernel.  If you run with only 1 Processors with HT on it will
not lock up but will degrade performance.  If you run with 9GB or less and 4
Processors it will not lock up.

When performance degrades LowFree in /proc/meminfo is bellow 9MB.

According to the Bugzilla the latest kernel still has a performance hit but does
not lockup.  Will regress with newer errata kernel.

Are there any tests that can be tried to assist Red Hat with problem resolution?

Action by: rhentosh
Issue Registered
Action by: ltroan
Escalated to Bugzilla

ISSUE TRACKER 15164, opened as sev 2 against 8.0
(will correct bugzilla - not beta) 
PER ABOVE MAY BE DUP OF bugzilla 79257.
Comment 1 Bugzilla owner 2004-09-30 11:40:29 EDT
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/

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