We've been running OpenCart 188.8.131.52 with vqMod for quite a while now and today we started getting 501 server errors for a while. When I contacted the host this is what they said:
"Looking into the issue, it seems that the only thing that I can see at this time is the coding of the script. I know that you have been using it and now it is just not working but I am not able to tell anything else since it is stable now. It may be that the cart is not closing the processes fast enough when people go through the entire process.
The cart is not closing the MySQL process fast enough. It seems that it is making so many processes that equal to 25 or when 1 process opens, it is not closing the older ones."
Has anyone else had this problem and know how to fix it so this doesn't happen again? We were down for only a few minutes but that was a few minutes of possibly new people stopping by and never coming back.