@andresrc Thanks below is the support ticket code
Yes we are running the codeigniter application with latest updated version, same is working on the another non-bitnami AWS server with out any issue.
In starting it was looking like CPU hit 100% while uploading a file but later realized that it's hitting anytime .
I used to connect putty tunnel using SSH to access the phpmyadmin.
Please, help it's really very urgent even now we are thinking to leave the bitnami stack and create custom server. Please, help regarding this.