I decided to write an article about a thing that is second nature to embedded systems programmers - low level bit hacks. Bit hacks are ingenious little programming tricks that manipulate integers in a smart and efficient manner. Instead of performing some operation (such as counting the 1 bits in ...
A couple of months ago I did a performance comparison between some of the top free DNS Resolvers available. It was just after Quad9 had launched and I was trying to decide which one to use and…
If you have 10,000 front-end users, having a connection pool of 10,000 would be shear insanity. 1000 still horrible. Even 100 connections, overkill. You want a small pool of a few dozen connections at most, and you want the rest of the application threads blocked on the pool awaiting connections.
imagine three threads (Tn=3), each of which requires four connections to perform some task (Cm=4). The pool size required to ensure that deadlock is never possible is:
pool size = 3 x (4 - 1) + 1 = 10
P. Kaur, M. Sachdeva, and G. Kaur. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT)2 (5):
37-44(October 2012)
M. Moazez, F. Safaei, and M. Rezazadeh. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT)2 (5):
01-11(October 2012)