Category Archives: Software
Guide: Solr performance tuning
Introduction I have for the last year been working a lot with the Solr search engine, and figuring out how to get the best performance from a Solr instance. And it is almost funny how much impact the little things … Continue reading
Clear disk cache on Linux
I have been doing a bit benchmarking in the previous days, and have then needed to clear the disk cache from RAM without wanting to reboot each time. The command i use for that is: 1 sync;echo 3 > /proc/sys/vm/drop_caches … Continue reading
Openoffice: “[context="bundled"] caught unexpected exception!” error
I noticed the error “[context="bundled"] caught unexpected exception!” on a OpenOffice installation on a terminal server. I noticed that OpenOffice have some issues with running on a terminal server, which i have noticed the hard way. The solution is to … Continue reading
Two Crucial C300 in RAID0 on a M4A87TD motherboard causes BSOD`s, hangs in Win7
So i have tried to use Two Crucial C300 in RAID0 on a M4A87TD motherboard for a while now. After a while i started experiencing BSOD`s, hangs, crashes, freezes etc. I tried to debug -everything- until i came over multiple complaints … Continue reading
WordPress: Image could not be processed. Please go back and try again.
This is a rather cryptical error message WordPress gives when trying to upload a header image and it fails. The solution is to make sure your server has php(5)-gd installed. Ubuntu: apt-get install php5-gd Red Hat: yum install php-gd
jpackages error: Missing Dependency: /usr/bin/rebuild-security-providers
Jpackages on Red Hat has a nifty bug that causes dependency errors. Luckily, somebody has created a fix as a rpm package wget http://plone.lucidsolutions.co.nz/linux/centos/images/jpackage-utils-compat-el5-0.0.1-1.noarch.rpm rpm -ivh jpackage-utils-compat-el5-0.0.1-1.noarch.rpm And then jpackages works.
ImportError: No module named trac
When working with a new Trac installation you can bump into the error message “ImportError: No module named trac”. This is usually caused by Trac installation not unzipping all the needed files. The following one liner should fix the issue: … Continue reading
package subversion-1.6.12-0.1.el5.rf.x86_64 (which is newer than subversion-1.4.2-4.el5_3.1.i386) is already installed
Package conflict that can appear some times, a simple fix then is to downgrade first, then upgrade: yum –downgrade update subversion yum update subversion
Acer machine with Windows XP giving reboot after booting
Today i had a problem with a Acer machine that kept rebooting just after the machine had started up Windows, typically a couple of seconds after everything was loaded. After managing to disable auto-reboot upon crash, i got a hold … Continue reading
Fix: Windows won`t download Windows Update updates
I have noticed some Windows machines refusing to download Windows Update packages and simply failing the download with little to no information about why. I tricks i found that works for me is to first stop WuAuServ: net stop WuAuServ … Continue reading