[Yum] yum check-update performance slow

[Mike McIntyre]

Novell provides a yum-2.4.2-13.4 rpm package on a SLES 10 SDK that were 
are using on SLES 10 SP1 zlinux s390x systems.  We use Novell Subscription 
Management Tool (SMT) on a nightly basis to download SLES rpm updates and 
execute createrepo.  First execution of yum check-update is really slow 
performance as shown below with 1012.65 +  2184.95 equal to about 52 
minutes.  Is there a performance fix for a certain yum level to process 
the primary.xml.gz files faster from yum check-update?

staszs010:/etc # yum check-update
Setting up repositories
base                      100% |=========================|  951 B    00:00
updates                   100% |=========================|  951 B    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 7.8 MB    00:03
base      :                                                    564/55117
base      : ################################################# 
54992/55117Added 54992 new packages, deleted 0 old in 1012.65 seconds
primary.xml.gz            100% |=========================| 7.8 MB    00:01
updates   : ################################################# 
54992/55117Added 54992 new packages, deleted 0 old in 2184.95 seconds

Here is the content of /etc/yum.conf.  We don't use *.repo files in 
/etc/yum.repos.d

[main]
cachedir=/var/cache/yum
reposdir=/etc/yum.repos.d
debuglevel=2
errorlevel=2
logfile=/var/log/yum.log
gpgcheck=1
assumeyes=0
tolerant=1
exactarch=1
obsoletes=1
distroverpkg=suse-release
retries=20
pkgpolicy=newest
installonlypkgs=kernel-default

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
[base]
name=SLES Linux $releasever - $basearch - Base
baseurl=http://pdmdxs001//repo/yum/Updates/
http://pdmdxs001//repo/yum/Updates/$RCE/SLES10-SP1-Updates/sles-10-s390x/
http://pdmdxs001//repo/yum/Updates/YOU9/s390x/

[updates]
name=SLES Linux $releasever - Updates
baseurl=http://pdmdxs001//repo/yum/Updates/
http://pdmdxs001//repo/yum/Updates/$RCE/SLES10-SP1-Updates/sles-10-s390x/
http://pdmdxs001//repo/yum/Updates/YOU9/s390x/
http://pdmdxs001//repo/yum/Updates/YOU9/s390/


Regards,....Mike McIntyre
Distributed System Management
Infrastructure Services | Server Support Team
Securities Industry Services | Financial Services Sector
IBM Global Technology Services, Canada
 
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