Question

我正在使用此命令编写运行Passenger编译的PHP脚本：

passenger-install-apache2-module --auto

如果我在SSH中运行该命令，它运行正常，但是当我从PHP启动它时，我得到“虚拟内存耗尽：无法分配内存”。

c++ -o buildout/support-binaries/CoreMain.o  -Isrc/agent -Isrc/cxx_supportlib -Isrc/cxx_supportlib/vendor-copy -Isrc/cxx_supportlib/vendor-modified -Isrc/cxx_supportlib/vendor-modified/libev -Isrc/cxx_supportlib/vendor-copy/libuv/include -D_REENTRANT -I/usr/local/include -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-long-long -Wno-missing-field-initializers -feliminate-unused-debug-symbols -feliminate-unused-debug-types -fvisibility=hidden -DVISIBILITY_ATTRIBUTE_SUPPORTED -Wno-attributes -ggdb -DHAS_ALLOCA_H -DHAVE_ACCEPT4 -DHAS_SFENCE -DHAS_LFENCE -DPASSENGER_DEBUG -DBOOST_DISABLE_ASSERTS -std=gnu++11 -Wno-unused-local-typedefs -DHASH_NAMESPACE="__gnu_cxx" -DHASH_MAP_HEADER="<hash_map>" -DHASH_MAP_CLASS="hash_map" -DHASH_FUN_H="<hash_fun.h>" -c src/agent/Core/CoreMain.cpp
virtual memory exhausted: Cannot allocate memory
rake aborted!
Command failed with status (1): [c++ -o buildout/support-binaries/CoreMain.o  -Isrc/agent -Isrc/cxx_supportlib -Isrc/cxx_supportlib/vendor-copy -Isrc/cxx_supportlib/vendor-modified -Isrc/cxx_supportlib/vendor-modified/libev -Isrc/cxx_supportlib/vendor-copy/libuv/include -D_REENTRANT -I/usr/local/include -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-long-long -Wno-missing-field-initializers -feliminate-unused-debug-symbols -feliminate-unused-debug-types -fvisibility=hidden -DVISIBILITY_ATTRIBUTE_SUPPORTED -Wno-attributes -ggdb -DHAS_ALLOCA_H -DHAVE_ACCEPT4 -DHAS_SFENCE -DHAS_LFENCE -DPASSENGER_DEBUG -DBOOST_DISABLE_ASSERTS -std=gnu++11 -Wno-unused-local-typedefs -DHASH_NAMESPACE="__gnu_cxx" -DHASH_MAP_HEADER="<hash_map>" -DHASH_MAP_CLASS="hash_map" -DHASH_FUN_H="<hash_fun.h>" -c src/agent/Core/CoreMain.cpp]
/usr/local/rvm/gems/ruby-2.3.3/gems/passenger-5.1.2/build/support/cplusplus.rb:52:in `run_compiler'
/usr/local/rvm/gems/ruby-2.3.3/gems/passenger-5.1.2/build/support/cplusplus.rb:102:in `compile_cxx'
/usr/local/rvm/gems/ruby-2.3.3/gems/passenger-5.1.2/build/support/cplusplus.rb:160:in `block in define_cxx_object_compilation_task'
Tasks: TOP => apache2 => buildout/support-binaries/PassengerAgent => buildout/support-binaries/CoreMain.o
(See full trace by running task with --trace)

我尝试过最高8GB内存的服务器。我没有在/ var / log / messages中获取任何OOM，因此我认为内存不是问题。

我知道为什么我只从exec（）运行时出现此错误？

Answer 1

我终于找到了这个问题。我的PHP脚本作为WHM（cPanel）插件运行，看起来WHM在运行脚本之前设置了ulimit。由于脚本以root身份运行，因此我只需在运行bash之前修改ulimit。

exec("ulimit -m unlimited -v unlimited; bash myscript.sh");

如果使用PHP

1 个答案: