2
似乎每10分鐘或更長時間，緩存似乎重置。我想我錯了。我正在使用APC來緩存3兆字節的HTML響應。在任何特定時間約有50人。據我瞭解使用mmap_file_mask將使用文件而不是內存，所以它不會佔用我的內存，但我仍然認爲它耗盡內存並重置自身。APC緩存不斷消失
它是一個具有1 GB內存的VPS，通常在運行free時顯示512MB和750 MB之間（這是我目前的256 MB SHM大小）。我應該將SHM大小從256增加到更高？
我應該使用APC來做到這一點嗎？還是更好地將響應存儲在文件中，然後使用它呢？
我APC INI如下：
extension = apc.so
apc.enabled = 1
apc.shm_segments = 1
apc.shm_size = 256
apc.optimization = 0
apc.num_files_hint = 10000
apc.ttl = 0
apc.user_ttl = 0
apc.gc_ttl = 0
apc.cache_by_default = 1
apc.filters = ""
apc.mmap_file_mask = "/tmp/apc.XXXXXX"
apc.slam_defense = 0
apc.file_update_protection = 2
apc.enable_cli = 0
apc.max_file_size = 10M
apc.stat = 1
apc.write_lock = 1
apc.report_autofilter = 0
apc.include_once_override = 0
apc.localcache = 0
apc.localcache.size = 512
apc.coredump_unmap = 0
apc.stat_ctime = 0
編輯：我的記憶更新爲512 MB，它持續了幾個小時，然後我就去睡覺。當我醒來時，所有的緩存都消失了。似乎它可能是一個記憶問題？我可能只是依靠文件或MySQL，調試APC不值得在頁面加載時節省的毫秒數。
這裏是問信息：
[num_slots] => 8192
[ttl] => 0
[num_hits] => 490
[num_misses] => 390
[num_inserts] => 13663
[expunges] => 0
[start_time] => 1355644615
[mem_size] => 5271328
[num_entries] => 204
[file_upload_progress] => 1
[memory_type] => mmap
[locking_type] => pthread mutex
[cache_list] => Array
然後它只是顯示緩存，沒有真正用於調試，我認爲任何問題非常有用的陣列。沒有什麼突出預先緩存清除。隨機緩存清除器前後的變化不大。不知道問題，對於3 MB x 50條目，512 MB的內存應該足夠了。即使那樣，我甚至不希望它使用內存。我希望它使用文件。
編輯2：
按照要求，這裏是APC的代碼，我使用：
<?php
$unique_options = "query_options_that_are_unique_to_1_of_the_50_caches";
$refresh_interval = 60*15;
$refresh_triggered = (isset($_REQUEST['refresh']));
// Try to get the APC Cache, if fails, then it was never created
if ($cache_array = apc_fetch(md5($unique_options))) {
// I got the cache, using its creation_time, see if its refreshable
$seconds_since_last_refresh = (time() - $cache_array['creation_time']);
$can_refresh = ($seconds_since_last_refresh >= $refresh_interval);
} else {
// Apparently this has never had a cache created, so create it
apc_store(md5($unique_options), array('data'=> get_json($unique_options), 'creation_time'=>time()), 0);
$cache_array = apc_fetch(md5($unique_options));
$refresh_triggered = false;
}
// If the cache already existed, and the user is attempting to refresh the cache, and they are allowed to refresh it, then refresh it.
if($refresh_triggered) {
if($can_refresh) {
apc_store(md5($unique_options), array('data'=> get_json($unique_options), 'creation_time'=>time()), 0);
$cache_array = apc_fetch(md5($unique_options));
} else {
echo "You can only refresh every 15 minutes<br><br>";
}
}
$current_url = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] && !in_array(strtolower($_SERVER['HTTPS']),array('off','no'))) ? 'https' : 'http' . '://'.$_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$url_parts = parse_url($current_url);
$url_without_query = $url_parts['scheme'] . '://' . $url_parts['host'] . $url_parts['path'];
foreach($_GET as $key => $value) {
if($key != "refresh")
$query .= "$key=$value&";
}
echo "Data was last refreshed " . ($seconds_since_last_refresh) . "seconds ago (<a href='$url_without_query?{$query}refresh'>Refresh Now</a>)<br><br>";
$data = $cache_array['data'];
// Now process the the information that was cached
// ...
?>
那麼現在呢。緩存是否隨機重置？信息功能說什麼？ – hakre
添加了無用的信息功能輸出。 – ParoX
該信息顯示緩存**未被重置**。您的代碼中可能有錯誤，而不是APC中。另外，你已經在輸出中切割了'cache_list'。你應該顯示它，洙。你也應該顯示代碼如何生成信息數據。 – hakre