PS. >From my experience, the hardest problem in running large-scale Twisted servers is finding memory leaks, and to a lesser extent debugging intermittent silent server crashes. It's not easy to attach a debugger to a production sever if you are looking for sources of intermittent crashes for example. Looking for memory leaks, esp Python garbage collection problems/circular references is not easy as well, the manhole does not always help here. Again, attaching a debugger that allows to list *all* objects in the memory, is not often feasible for a production server under high load. And memory leaks often appear only under CPU utilization, due to problems with scheduling garbage collection.
I believe E has a way to dynamically and meaningfully inspect ALL objects in the memory of any running process. > I think we are accounting way too much time to the unfounded > unaccountable random blathering of a troll :-) As you can see from the %CPU column, I have my reasons for concern ;) This is current copy and paste from a node with 2x quad core xeon L5420 @ 2.50GHz - 1 twistd process per core. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 24448 nobody 20 0 991m 607m 2452 R 99 4.3 24764:37 twistd 28553 nobody 20 0 909m 453m 2412 R 95 3.2 1346:51 twistd 24640 nobody 20 0 1092m 676m 2452 R 93 4.8 32750:14 twistd 29900 nobody 20 0 802m 362m 2412 R 93 2.6 1180:53 twistd 24279 nobody 20 0 761m 277m 2424 R 42 2.0 13891:58 twistd 32422 nobody 20 0 1381m 962m 2372 R 10 6.9 13241:54 twistd 24210 nobody 20 0 599m 236m 2396 S 4 1.7 9063:29 twistd 29862 nobody 20 0 323m 14m 2384 S 2 0.1 71:53.50 twistd > -----Original Message----- > From: twisted-python-boun...@twistedmatrix.com [mailto:twisted-python- > boun...@twistedmatrix.com] On Behalf Of Laurens Van Houtven > Sent: Tuesday, September 29, 2009 12:28 PM > To: Twisted general discussion > Subject: Re: [Twisted-Python] I found an interisting comment about > Twisted vs. Erlang > > I think we are accounting way too much time to the unfounded > unaccountable random blathering of a troll :-) > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python@twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
