Found 41 results for: Document Analysis
When to use Memcached or Redis 2.8 for caching and PHP sessions on CentOS 6. Covers persistence, eviction, AOF fsync stalls, and a split-instance setup.
How to keep slow jobs out of the web request path with RabbitMQ, Celery 3.0 and Nginx 1.2 on Debian 7, with corrected configuration and the limits of the setup.
How to build reports from raw Apache or Nginx access logs with AWStats on CentOS 6: log format, config, cron, protected access, and limits.
How to tell when an OpenVZ container is being refused resources: read user_beancounters, interpret failcnt, and shrink MySQL and Apache to fit the limits.
How to confirm that MySQL 5.5 is stuck on disk I/O, and how to tune the I/O scheduler, ext4 mount options and InnoDB settings for flash or fast virtual storage.
How to run a private, key-only Git server with Gitolite 2.x on CentOS 6, with access rules kept in a Git repository. Covers latency, I/O, and backups.
A 2010-era baseline for CentOS 5 and Ubuntu 10.04: key-only SSH, a default-drop iptables policy, sysctl network settings and fewer listening services.
A 2009 reference for VPS users on container-based hosting: why "Cannot allocate memory" appears while free shows RAM, and how to read and fix it.
A 2009 reference for choosing between a VPS and a dedicated server. It covers how to find and fix OpenVZ memory-limit failures with user_beancounters.
Why services in an OpenVZ container fail with allocation errors while free memory looks fine, and how to find and raise the exhausted User Beancounter limit.
How to remove the single points of failure from a small web cluster in 2009: two HAProxy nodes sharing a VRRP address in front of two or more web nodes.