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Beautify and reword a bit.

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This commit is contained in:
Jani Taskinen 2007-07-19 13:57:06 +00:00
parent 0dcd530e22
commit 5778b43e2f
1 changed files with 28 additions and 7 deletions
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35
Zend/README.ZEND_MM
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@ -1,13 +1,34 @@
The goal of the new memory manager (PHP 5.2 and later) is reducing memory allocation overhead and speedup memory management.
Zend Memory Manager
===================
The new manager's "configure" has no "--disable-zend-memory-manager" option, but it has "--enable-malloc-mm" instead. It is enabled by default in DEBUG build and disabled by default in RELEASE built. It allows select malloc/emalloc at runtime. So you can use internal and external memory debuggers without recompilation.
General:
--------
$ sapi/cli/php -r 'leak();'
The goal of the new memory manager (available since PHP 5.2) is to reduce memory
allocation overhead and speedup memory management.
$ USE_ZEND_ALLOC=0 valgrind --leak-check=full -r 'leak();'
The new manager's "configure" has no "--disable-zend-memory-manager" option,
but it has "--enable-malloc-mm" instead. It is enabled by default in DEBUG
build and disabled by default in RELEASE build. when enabled it allows selecting
between malloc and emalloc at runtime so you can use internal and external memory
debuggers without recompilation.
The patch allows tweaking memory manager with ZEND_MM_MEM_TYPE and ZEND_MM_SEG_SIZE environment variables. Default values are "malloc" and "256K". Dependent on target system you can also use "mmap_anon", "mmap_zero"
and "win32" storage managers.
Debugging:
----------
$ ZEND_MM_MEM_TYPE=mmap_anon ZEND_MM_SEG_SIZE=1M sapi/cli/php
Normal:
$ sapi/cli/php -r 'leak();'
Zend MM disabled:
$ USE_ZEND_ALLOC=0 valgrind --leak-check=full sapi/cli/php -r 'leak();'
Tweaking:
---------
The Zend MM can be tweaked using ZEND_MM_MEM_TYPE and ZEND_MM_SEG_SIZE environment
variables. Default values are "malloc" and "256K". Dependent on target system you
can also use "mmap_anon", "mmap_zero" and "win32" storage managers.
$ ZEND_MM_MEM_TYPE=mmap_anon ZEND_MM_SEG_SIZE=1M sapi/cli/php ..etc.