This is just a short guide on how to find the main offenders in case of web server hammering. Sample of eventual output: netstat -natp | grep :80 | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n | tail 25 195.150.23.130 25 67.222.164.140 [...]
Ok so it all started like this: Bunch of web servers, all the same model (Dell R710), all functioning properly – however two of them are faster then the others (40% lower response time AND lower load average). Average connections to all the machines was identical. Hardware: Identical Software: Identical (to eliminate this as an [...]