Hi all, I've been trying to track down why my naviserver processes have such a large memory footprint compared to similarly configured aolserver processes. One culprit I already found is the pre-allocation of per-conn compression streams (the fixes to this have already been mentioned, tho not yet committed).
The other culprit is strange. It appears that naviserver is completely ignoring the stacksize parameter, and starting all threads with the default size, which on linux is the maximum stack size at process start time, 8Mb by default. This isn't a case of the wrong parameter being set, it appears to be a behavior of the nsthread library. nsthreadtest shows the same behavior, even after it calls Ns_ThreadStackSize(81920); I've added a debug printf to pthread.c to double-check what is being passed as the stacksize parameter, and it's the expected value in all cases, it's just not used for some reason. I've been using strace to peek at what's going on, and nsthreadtest in naviserver looks like mmap2(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xb4bfa000 mprotect(0xb4bfa000, 4096, PROT_NONE) = 0 clone(child_stack=0xb53fa494, ... while in aolserver it's mmap2(NULL, 90112, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xb748b000 mprotect(0xb748b000, 4096, PROT_NONE) = 0 clone(child_stack=0xb74a0494, ... As you can see it's an ~8M vs 90k (81920 + guard pages) allocation. Does anyone else on linux see the same behavior, or should I be looking at local differences? Second, the naviserver and aolserver nsthread libraries aren't identical, but they aren't very different. Any ideas what would be causing this behavior? -J ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ naviserver-devel mailing list naviserver-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/naviserver-devel
