memory logger

gistfile1.txt

#!/usr/local/bin/ruby

log_file = "/var/log/mem_stats"
date = `date`.rstrip
mem_stats = `free -k`.split

output = ""

if Dir[log_file] == []
        output << "date,\t total memory,\t used memory,\t free memory\n"
end

output << "#{date},\t #{mem_stats[7]}kb,\t #{mem_stats[8]}kb,\t #{mem_stats[9]}kb\n"

File.open(log_file, 'a') {|f| f.write(output) }