As a frequent reader of my blog, you might have noticed that vcloudnine.de was unavailable from time to time. Reason for this was, that my server was running out of memory at night. Jan 1 05:22:16 webserver kernel: : httpd invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0, oom_score_adj=0 Running out of memory is bad for system uptime. Sometimes you have to sacrifice someone to help others. It is the job of the linux ‘oom killer’ to sacrifice one or more processes in order to free up memory for the system when all else fails.