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File apc.ini of Package php5-APC
extension=apc.so ; 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.enabled=1 ; 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_segments=1 ; 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.shm_size=128 ; 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.optimization=0 ; 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.num_files_hint=1024 ; Just like num_files_hint, a "hint" about the number ; of distinct user cache variables to store. ; Set to zero or omit if you're not sure; ; (Default: 100) ; apc.user_entries_hint = 100 ; The number of seconds a cache entry is allowed to ; idle in a slot in case this cache entry slot is ; needed by another entry. Leaving this at zero ; means that your cache could potentially fill up ; with stale entries while newer entries won't be ; cached. ; (Default: 0) ; apc.ttl=7200 ; The number of seconds a user cache entry is allowed ; to idle in a slot in case this cache entry slot is ; needed by another entry. Leaving this at zero ; means that your cache could potentially fill up ; with stale entries while newer entries won't be ; cached. ; (Default: 0) ; apc.user_ttl=7200 ; 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.gc_ttl = 3600 ; On by default, but can be set to off and used in ; conjunction with positive apc.filters so that files ; are only cached if matched by a positive filter. ; (Default: On) ; ; apc.cache_by_default = On ; 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. If the ; first character of the expression is a + then the ; expression will be additive in the sense that any ; files matched by the expression will be cached, and ; if the first character is a - then anything matched ; will not be cached. The - case is the default, so ; it can be left off. ; (Default: "") ; ; apc.filters = "" ; 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. ; (Default: "") apc.mmap_file_mask=/tmp/apc.XXXXXX ; ; On very busy servers whenever you start the server or ; modify files you can create a race of many processes ; all trying to cache the same file at the same time. ; This option sets the percentage of processes that will ; skip trying to cache an uncached file. Or think of it ; as the probability of a single process to skip caching. ; For example, setting this to 75 would mean that there is ; a 75% chance that the process will not cache an uncached ; file. So the higher the setting the greater the defense ; against cache slams. Setting this to 0 disables this ; feature. ; (Default: 0) ; ;apc.slam_defense = 0 ; ; When you modify a file on a live web server you really ; should do so in an atomic manner. That is, write to a ; temporary file and rename (mv) the file into its permanent ; position when it is ready. Many text editors, cp, tar and ; other such programs don't do this. This means that there ; is a chance that a file is accessed (and cached) while it ; is still being written to. This file_update_protection ; setting puts a delay on caching brand new files. The ; default is 2 seconds which means that if the modification ; timestamp (mtime) on a file shows that it is less than 2 ; seconds old when it is accessed, it will not be cached. ; The unfortunate person who accessed this half-written file ; will still see weirdness, but at least it won't persist. ; If you are certain you always atomically update your files ; by using something like rsync which does this correctly, you ; can turn this protection off by setting it to 0. If you ; have a system that is flooded with io causing some update ; procedure to take longer than 2 seconds, you may want to ; increase this a bit. ; (Default: 2) ; ;apc.file_update_protection = 2 ; Mostly for testing and debugging. Setting this enables APC ; for the CLI version of PHP. Normally you wouldn't want to ; create, populate and tear down the APC cache on every CLI ; request, but for various test scenarios it is handy to be ; able to enable APC for the CLI version of APC easily. ; (Default: 0) ; apc.enable_cli=1 ; apc.max_file_size Prevents large files from being cached. ; (Default: 1M) ; ;apc.max_file_size = 1M ; Whether to stat the main script file and the fullpath ; includes. If you turn this off you will need to restart ; your server in order to update scripts. ; (Default: 1) ; ;apc.stat = 1