What is the problem? Try this!
watch -n 60 'ps aux | grep -E "CPU|Memory|php" | awk "{print \$1, \$2, \$3, \$4, \$11}" >> logfile.log'
-n 60 == 60s intervall
I can tell you before a detailed analysis what the problem with the high server load is. The cause is most likely the combination of...