apc_store isn't working between requests

$bar = 'BAR';
apc_store('foo', $bar);
var_dump(apc_fetch('foo'));
 В рамках одного запроса это сработает. 
 Теперь, если я попытаюсь выполнить  var_dump (apc_fetch ('foo'));  по другому запросу, он напечатает: 
bool(false)
 Есть помощь? 
 Я использую gentoo с PHP 5.2, APC-3.1.9 
 Вот что phpinfo () знает об APC: 
APC Support enabled
Version 3.1.9
APC Debugging   Disabled
MMAP Support    Enabled
MMAP File Mask  no value
Locking type    pthread mutex Locks
Serialization Support   php
Revision    $Revision: 308812 $
Build Date  May 27 2011 13:14:20

Directive   Local Value Master Value
apc.cache_by_default    On  On
apc.canonicalize    On  On
apc.coredump_unmap  Off Off
apc.enable_cli  Off Off
apc.enabled On  On
apc.file_md5    Off Off
apc.file_update_protection  2   2
apc.filters no value    no value
apc.gc_ttl  3600    3600
apc.include_once_override   Off Off
apc.lazy_classes    Off Off
apc.lazy_functions  Off Off
apc.max_file_size   1M  1M
apc.mmap_file_mask  no value    no value
apc.num_files_hint  1000    1000
apc.preload_path    no value    no value
apc.report_autofilter   Off Off
apc.rfc1867 Off Off
apc.rfc1867_freq    0   0
apc.rfc1867_name    APC_UPLOAD_PROGRESS APC_UPLOAD_PROGRESS
apc.rfc1867_prefix  upload_ upload_
apc.rfc1867_ttl 3600    3600
apc.serializer  default default
apc.shm_segments    1   1
apc.shm_size    32M 32M
apc.slam_defense    On  On
apc.stat    On  On
apc.stat_ctime  Off Off
apc.ttl 0   0
apc.use_request_time    On  On
apc.user_entries_hint   4096    4096
apc.user_ttl    0   0
apc.write_lock  On  On
 Если вам нужна другая информация, сообщите мне 
 Вот как я его установил:  https://serverfault.com/questions/274261/failed-installing-apc 
 Я заметил одну вещь: в команде phpinfo 'Configure я не нашел apc 

 
' ./ configure '' - disable-cli '
 '--disable-discard-path'
 '--disable-force-cgi-redirect'
 '--prefix = / usr / local / php5'
 '--with-config-file-path = / usr / local / lib / php5' '--with-pear = / usr / share / php5'
 '--enable-exif' '--enable-ftp'
 '--enable-bcmath' '--enable-calendar'
 '--with-gd' '--enable-gd-native-ttf'
 '--with-freetype-dir' '--with-gettext'
 '--with-zlib-dir' '--with-imap'
 '--with-imap-ssl'
 '--with-png-dir=/usr'
 '--with-jpeg-dir=/usr'
 '--with-xpm-dir=/usr' '--with-openssl'
 '--with-kerberos' '--enable-sysvsem'
 '--enable-sysvshm' '--with-mcrypt'
 '--with-iconv' '--enable-mbstring=all'
 '--enable-mbregex' '--with-mysql=/usr'
 '--with-mysqli' '--with-curl'
 '--with-xsl'