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Installation Instructions for APC
---------------------------------
APC has been successfully compiled on the following platforms:
o Linux (RH 6.2/7.2/7.3/8)
o FreeBSD
o OpenBSD
o MacOS 10.2 (statically compiled)
...and has been tested with the following PHP versions:
o 4.2.2
o 4.2.3
o 4.3.0
o 4.3.2
Versions prior to 4.2.2 have been officially deprecated by the PHP group, and
therefore aren't supported by APC either.
+---------------------+
| QUICK INSTALL (DSO) |
+---------------------+
These instructions assume your PHP installation is located in /usr/local/php.
$ gunzip -c apc_x.y.tar.gz | tar xf -
$ cd apc_x.y
$ /usr/local/php/bin/phpize
$ ./configure --enable-apc
$ make
$ make install
You will probably need to run the final command (make install) as root.
The above sequence of commands will install a .so file in your PHP
installation extension directory. The output of make install should display
that path to the screen.
Next you must edit your php.ini file, which is normally located in
/usr/local/php/lib/php.ini, and add the following line:
extension="apc.so"
Replace "/path/to/php/extensions" with whatever path was displayed when you
ran make install above.
Then restart your web server and consult the output of phpinfo(). If there is
an informational section for APC, the installation was successful.
+------------------------+
| QUICK INSTALL (Static) |
+------------------------+
APC will not successfully compile on all systems as a DSO. If you run into
problems using the DSO quick install, you can try to compile it statically
into PHP. (The DSO install is recommended, though.)
These instructions assume the current directory is the root of the PHP source
tree, and that you have already configured PHP by running its bundled
configure script.
$ cd ext
$ gunzip -c apc_x.y.tar.gz | tar xf -
$ cd ..
$ ./buildconf
$ ./config.nice
$ make
$ make install
Once this is complete, simply restart your web server. You do not need to
modify your php.ini file to enable APC.
+-----------------+
| VERBOSE INSTALL |
+-----------------+
These instructions assume your PHP installation is located in /usr/local/php.
1. Unpack your distribution file.
You will have downloaded a file named something like apc_x.y.tar.gz.
Unzip this file with a command like
gunzip apc_x.y.tar.gz
Next you have to untar it with
tar xvf apc_x.y.tar
This will create an apc_x.y directory. cd into this new directory:
cd apc_x.y
2. Run phpize.
phpize is a script that should have been installed with PHP, and is
normally located in /usr/local/php/bin assuming you installed PHP in
/usr/local/php. (If you do not have the phpize script, you must reinstall
PHP and be sure not to disable PEAR.)
Run the phpize command:
/usr/local/php/bin/phpize
Its output should resemble this:
autoheader: `config.h.in' is created
You should update your `aclocal.m4' by running aclocal.
Configuring for:
PHP Api Version: 20020918
Zend Module Api No: 20020429
Zend Extension Api No: 20021010
phpize should create a configure script in the current directory. If you
get errors instead, you might be missing some required development tools,
such as autoconf or libtool. You can try downloading the latest versions
of those tools and running phpize again.
3. Run the configure script.
phpize creates a configure script. The only option you need to specify is
the location of your php-config script:
./configure --with-enable-apc
php-config should be located in the same directory as phpize.
If you prefer to use mmap instead of the default IPC shared memory support,
add --enable-mmap to your configure line. If you don't understand the
difference between the two, stick with the default.
If you prefer to use sysv IPC semaphores over the safer fcntl() locks, add
--enable-sem to your configure line. If you don't have a problem
with your server segaulting, or any other unnatural accumulation of
semaphores on your system, the semaphore based locking is slightly faster.
4. Compile and install the files. Simply type: make install
(You may need to be root in order to install)
If you encounter errors from libtool or gcc during this step, please
contact the project maintainer (dcowgill@php.net).
5. Edit your php.ini
make install should have printed a line resembling the following:
Installing shared extensions: /path/to/extension/
Copy the path /path/to/extension/ and add the following line to your
php.ini file (normally located in /usr/local/php/lib/php.ini):
extension="apc.so"
If you don't have a php.ini file in that location, you can create it now.
6. Restart the web server and test the installation.
Restart your web server now (for apache, it's apachectl restart) and
create a small test PHP file in your document root. The file should
contain just the following line:
<?php phpinfo() ?>
Request that file in a web browser. If there is an entry for APC in the
list of installed modules, the installation was successful.
If APC is not listed, consult your web server error log. If it contains an
error message saying that it can't load the APC extension, your system
might not be able to load shared libraries created with PHP's build
system. One alternative would be to compile APC statically into PHP. See
the Quick Install (Static) instructions above.
You should consult your error log anyway to see if APC generated any
errors. On BSD-based platforms, it is typical for APC to be unable to
allocate the default-sized shared memory segment. See below for hints on
raising your system's shared memory limitations.
If all else fails, ask for help on the APC mailing list. Visit
http://apc.communityconnect.com/ for more information.
+-----------------+
| CONFIGURING APC |
+-----------------+
Although the default APC settings are fine for many installations, serious
users should consider tuning the following parameters:
OPTION DESCRIPTION
------------------ --------------------------------------------------
apc.enabled This can be set to 0 to disable APC. This is
primarily useful when APC is statically compiled
into PHP, since there is no other way to disable
it (when compiled as a DSO, the zend_extension
line can just be commented-out).
(Default: 1)
apc.shm_segments The number of shared memory segments to allocate
for the compiler cache. If APC is running out of
shared memory but you have already set
apc.shm_size as high as your system allows, you
can try raising this value.
(Default: 1)
apc.shm_size The size of each shared memory segment in MB.
By default, some systems (including most BSD
variants) have very low limits on the size of a
shared memory segment.
(Default: 30)
apc.optimization The optimization level. Zero disables the
optimizer, and higher values use more aggressive
optimizations. Expect very modest speed
improvements. This is experimental.
(Default: 0)
apc.num_files_hint A "hint" about the number of distinct source files
that will be included or requested on your web
server. Set to zero or omit if you're not sure;
this setting is mainly useful for sites that have
many thousands of source files.
(Default: 1000)
apc.gc_ttl The number of seconds that a cache entry may
remain on the garbage-collection list. This value
provides a failsafe in the event that a server
process dies while executing a cached source file;
if that source file is modified, the memory
allocated for the old version will not be
reclaimed until this TTL reached. Set to zero to
disable this feature.
(Default: 3600)
apc.filters A comma-separated list of POSIX extended regular
expressions. If any pattern matches the source
filename, the file will not be cached. Note that
the filename used for matching is the one passed
to include/require, not the absolute path.
(Default: "")
apc.mmap_file_mask If compiled with MMAP support by using --enable-mmap
this is the mktemp-style file_mask to pass to the
mmap module for determing whether your mmap'ed memory
region is going to be file-backed or shared memory
backed. For straight file-backed mmap, set it to
something like /tmp/apc.XXXXXX (exactly 6 X's).
To use POSIX-style shm_open/mmap put a ".shm"
somewhere in your mask. eg. "/apc.shm.XXXXXX"
You can also set it to "/dev/zero" to use your
kernel's /dev/zero interface to anonymous mmap'ed
memory. Leaving it undefined will force an
anonymous mmap.