On Sat, Mar 01, 2014 at 11:06:32PM +0530, vijeesh vijayan wrote: > Thanks. will share screenshot shortly. roundrobin recommented for mysql > also?
What Baptiste is explaining is that leastconn focuses on balancing the number of established connections and not the cumulated number of connections. If one server responds slowly and the other responds fast, the slow one will always have a certain number of open connections while the fast one will have very few. Thus it is normal that haproxy will pick the fast one more often than the slow one. And this is precisely the purpose of leastconn. Some people use leastconn to avoid servers which are suffering from some local system perturbations (eg: backups). And in general, what you're observing means exactly that one server is working much better than another one. So round robin will equally distribute the number of requests to your servers, but will degrade the quality of service since the slow one will get more requests than right now, and the fast one will remain mostly idle waiting for the slow one to get its share. Willy
