Python
django mod_wsgi 記憶體問題
我在 VPS 伺服器（128mb ram）上有我的 django 應用程序當我用 python manage.py runserver 啟動它時，它執行良好，但如果我嘗試在 apache/mod_wsgi 上使用它，它很快就會導致嚴重的減速（在我點擊幾個我網頁上的隨機連結），它似乎記憶體不足。這甚至發生在“hello world”應用程序中。但這有點奇怪，因為它執行良好 wit manage.py runserver 有什麼想法嗎？
/var/log/apache2/error.log ----------------------------- [Wed Feb 10 00:00:40 2010] [error] [client 65.55.37.202] File does not exist: /var/www/robots.txt [Wed Feb 10 00:01:22 2010] [error] [client 65.55.37.202] File does not exist: /var/www/file [Wed Feb 10 00:02:32 2010] [warn] child process 2023 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:32 2010] [warn] child process 1961 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:32 2010] [warn] child process 1994 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:32 2010] [warn] child process 1995 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:32 2010] [warn] child process 1996 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:33 2010] [warn] child process 2023 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:33 2010] [warn] child process 1961 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:33 2010] [warn] child process 1994 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:33 2010] [warn] child process 1995 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:33 2010] [warn] child process 1996 still did not exit, sending a SIGTERM [Wed Feb 10 00:02:34 2010] [notice] caught SIGTERM, shutting down [Wed Feb 10 00:15:31 2010] [notice] mod_python: Creating 8 session mutexes based on 150 max processes and 0 max threads. [Wed Feb 10 00:15:31 2010] [notice] mod_python: using mutex_directory /tmp [Wed Feb 10 00:15:32 2010] [notice] Apache/2.2.9 (Ubuntu) PHP/5.2.6-2ubuntu4 with Suhosin-Patch mod_python/3.3.1 Python/2.5.2 mod_wsgi/2.3 configured -- resuming normal operations [Wed Feb 10 00:17:24 2010] [error] [client 202.152.243.143] File does not exist: /var/www/file, referer: http://www.webmaster-tutorial.com/view/919 [Wed Feb 10 00:19:56 2010] [error] [client 202.152.243.143] File does not exist: /var/www/favicon.ico [Wed Feb 10 00:20:09 2010] [error] [client 202.152.243.143] File does not exist: /var/www/favicon.ico [Wed Feb 10 00:23:25 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:23:41 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:23:52 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:24:03 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:24:16 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:24:29 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:24:39 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:24:51 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:25:01 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:25:11 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:25:21 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:25:31 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Wed Feb 10 00:25:41 2010] [error] (12)Cannot allocate memory: fork: Unable to fork new process ----------------------------------
確保您沒有使用嵌入式模式。請改用守護程序模式。看：
http://blog.dscpl.com.au/2009/03/load-spikes-and-excessive-memory-usage.html
解釋為什麼嵌入式模式不適合受限的記憶體環境。
順便說一句，也拋棄 mod_python 並使用更新的 mod_wsgi，特別是 mod_wsgi 3.X 並設置：
WSGIRestrictEmbedded On除了使用守護程序模式來獲得更多的記憶體節省。