问题描述
我的EC2 Micro实例存在内存问题，这导致它终止了我的MySQL进程。
I have a memory problem with my EC2 Micro instance which is causing it to terminate my MySQL process.
我已经阅读了很多有关调整Apache以限制内存消耗的信息，并且希望编辑Prefork MPM设置。抓住的是-当我进入httpd.conf时，我没有提到任何MPM模块。
I've read a lot about tuning Apache to limit the memory consumption and am looking to edit the Prefork MPM settings. Catch is - when I go into httpd.conf, I see no mention of any MPM modules.
我一直在寻找，唯一可以找到的参考文献是在/etc/httpd/conf.modules.d/00-mpm.conf中可以看到应该安装了prefork模块。 （LoadModule mpm_prefork_module模块/mod_mpm_prefork.so）
I've been looking around and the only reference I can find to it is in /etc/httpd/conf.modules.d/00-mpm.conf where I can see that the prefork module is supposed to be loaded. (LoadModule mpm_prefork_module modules/mod_mpm_prefork.so)
当我执行httpd -l时，未列出prefork.c。
When I do httpd -l , prefork.c is NOT listed.
目前，我不确定模块是否已使用apache加载/编译，如果可以，如何配置。感谢任何帮助！
At this point I'm not sure if the module is loaded/compiled with apache, and if it is - how to configure it. Appreciate any help!
推荐答案
您可以检查正在运行的MPM：
You can check which MPM is running:
httpd -M | grep mpm
您会看到类似的内容：
mpm_prefork_module (shared)
所有MPM（prefork，工作者，事件）是从您提到的文件配置的：
All MPM's (prefork, worker, event) are configured from the file you mentioned:
/etc/httpd/conf.modules.d/00-mpm.conf
我相当确定AWS仅使用默认值，因此除了加载模块之外没有任何其他东西。您可以继续添加设置。例如
I am fairly sure AWS just uses the defaults so there is nothing except loading the module. You can go ahead and add your settings. e.g.
LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
StartServers 5
ServerLimit 256
MaxRequestWorkers 256
MaxConnectionsPerChild 0
您可以检查了解更多选项
You can check https://httpd.apache.org/docs/2.4/mod/mpm_common.html for more options.
我也遇到了内存问题，并考虑配置MPM来解决该问题，但是它只能减少问题，而不能完全解决问题。
I too have had memory issues and looked at configuring MPM to fix the problem however it only reduced the issues and didn't fix the problem completely.
我最终使用以下命令来设置环境变量：
I ended up using the below to set an environment variable:
export USE_ZEND_ALLOC=0
此后我没有记忆问题。
这篇关于Prefork MPM配置不在httpd.conf中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！