concurrency - Limiting the maximum number of concurrent requests django/apache -

-

i have django site demonstrates usage of tool. 1 of views takes file input , runs heavy computation trough external python script , returns output user. tool runs fast enough return output in same request though. want limit how many concurrent requests url/view keep server getting congested.

any tips on how go doing this? page in simple , usage low.

presuming using mod_wsgi, segment wsgi application on multiple mod_wsgi daemon process groups specific urls want restrict delegated mod_wsgi daemon process group of own lesser number of processes/threads.

wsgidaemonprocess myapp processes=2 threads=10 wsgidaemonprocess myapp-restricted threads=2  wsgiscriptalias / /some/path/app.wsgi  wsgiprocessgroup myapp  <location /some/specific/url> wsgiprocessgroup myapp-restricted </location>

note requests queued access 2 threads in restricted process still consume worker thread in main apache server child processes. thus, want make sure use worker mpm (so no mod_php) , configure mpm sufficient spare threads handle backed requests normal traffic.


Comments

Post a Comment

Popular posts from this blog

javascript - Enclosure Memory Copies -

-
function myclass() { //lots , lots of vars , code here. this.bar = function() { //do numerous enclosed myclass vars } this.foo = function() { alert('hello'); //don't enclosed variables. } } each instance of myclass gets own copy of bar , foo, why prototyped methods use less memory. however, know more memory use of inner methods. it seems obvious me (1) below must true. agree? not distinct myclass instances have own distinct copies of bar, must have own distinct copies of myclass enclosure. (or else how bar method keep myclass variables straight on per instance basis?) now (2) question i'm after. since inner foo method doesn't use in myclass enclosure natural qustion is: javascript smart enough not keep myclass enclosure in memory use of foo? this depend entirely on implementation not language. naive implementations keep far more around others. answer true e.g. v8 (chrome's js engine) may not true spider...
Read more

php - Replacing tags in braces, even nested tags, with regex -

-
example preg_replace('/\{[a-za-z.,\(\)0-9]+\}/', 'replaced', 'lorem ipsum dolor sit {tag1({tag2()})}, consectetur adipiscing elit.'); the result: lorem ipsum dolor sit {tag1(replaced)}, consectetur adipiscing elit. question as can see "tag2" has been replaced, want replace "tag1" know how can this? (in cases might this: {tag1({tag2({tag3()})})}) , on.) btw using preg_replace_callback, easier show preg_replace here site can test code: http://www.spaweditor.com/scripts/regex/index.php you need add curly braces character set. here's pattern used: /\{[a-za-z.,\(\)\{\}0-9]+\}/ and here result: "lorem ipsum dolor sit replaced, consectetur adipiscing elit."
Read more