json - Apache2 in Freebsd Concurrent request cause Connection reset -


i trying move web server (php zendframework based) ubuntu freebsd. both servers having same hardware configuration. after migration, did jmeter test (http request (json), concurrent = 200) of server, "throughput" in freebsd server double of ubuntu server amazing.

however, when increase concurrent 500, see 50% request failure due "java.net.socketexception: connection reset". works normal in ubuntu server.

after many times testing, found ubuntu can handle 1500 concurrent httprequest without error, freebsd server can handle 200 concurrent request double speed without error, cannot handle more. in order verify result, tried ab command. **ab -c 200 -n 5000 127.0.0.1/responsecontroller. fails , terminate if ¬-c parameter on 200, works fine in ubuntu.

for debugging did following: 1. adjust httpd.conf, /boot/loader.conf, /etc/sysctl.conf somehow, looks nothing changed. 2. try switch mpn_worker_module in apache configuration , relevant configuration in php. nothing changed failure part log different, showed "request failure respond" rather "java.net.socketexception: connection reset"

i did lot of search couldn't find cause of failure. though json request waiting until response or timeout? not sure configuration file or parameter make work.

please help.

thanks michael zhilin, yes "ipfw" did caused this, , yes "kern.ipc.soacceptqueue" bottleneck in case.


-

Comments

Post a Comment

Popular posts from this blog

amazon web services - S3 Pre-signed POST validate file type? -

i know it's possible put limit on file size content-length-range header. possible validate file type? https://docs.aws.amazon.com/amazons3/latest/dev/httppostforms.html#policyconditions i see there content-type header, if set say, audio/mp3 allow mp3 files , return error if file not mp3? i found previous question answers mention validating file size: s3 direct upload restricting file size , type you can specify content-type @ post request. you can specify @ signature, post must done content-type: { "expiration": "2007-12-01t12:00:00.000z", "conditions": [ {"acl": "public-read" }, {"bucket": "johnsmith" }, {"content-type: "audio/mp3"} ] } creating html form (using aws signature version 4) edit: @ previous question found, checking content-type.
Read more

c# - Check Keyboard Input Winforms -

i wondering if instead of doing this protected override void onkeydown(keyeventargs e) { if (e.keycode == keys.a) console.writeline("the key down."); } i set bool method , this: if(keydown(keys.a)) // whatever here i've been sitting here ages trying figure out how it. can't wrap head around it. in case wondering, plan call bool inside different method, check input. since want perform action after pressing key, using keydown event enough. but in cases suppose want check if specific key down in middle of process, can use getkeystate method way: [dllimport("user32.dll", charset = charset.auto, exactspelling = true)] public static extern short getkeystate(int keycode); public const int key_pressed = 0x8000; public static bool iskeydown(keys key) { return convert.toboolean(getkeystate((int)key) & key_pressed); } you should know, each time check key state using example iskeydown(keys.a) method returns true if ke...
Read more