php-fpm processes increases to max during these timeslots (normal 37 , max 57) and mysql load (normal 0.5 to 5%) also increased above 100%. After like 30 to 50 mins its goes down automatically.
Out of this time slot system handles larger number of users at less than 15% of CPU. I am collecting SAR stats and I will send that too..
As I am getting this surge at fix timing I was wondering is there any hidden cron/schedules job/ event that I am missing. Can you please give me some pointers in that direction..