Bug #65559 [Com]: Opcache: cache not cleared if changes occur while running

Edit report at https://bugs.php.net/bug.php?id=65559&edit=1 ID: 65559 Comment by: zoeslam at gmail dot com Reported by: zoeslam at gmail dot com Summary: Opcache: cache not cleared if changes occur while running Status: Assigned Type: Bug Package: opcache Operating System: Ubuntu PHP Version: 5.5.3 Assigned To: dmitry Block user comment: N Private report: N New Comment: Hi dmitry, almost all http requests last less than 1 second, and it's common to write this cache algorithm: $var = include $cachefile; if (must_renew($var)) { file_put_contents($cachefile, renew($var)); $var = include $cachefile; } use($var); So I think APC did a workaround just because of that common usage. Your workaround works, but it' pretty bad to couple a general algorithm to teh cache subsystem. Previous Comments: ------------------------------------------------------------------------ [2013-11-25 10:41:51] dmitry@php.net APC made a hack to prevent caching of just updated files. This makes the test passed. With opcache.revalidate_freq=0 OPCache checks file modification time on each include(), but the test script most probably makes two writes in a single second. So file modification times are the same. If you insert sleep(1) between inclue()s, it works as expected. To workaround the problem you may add the file into blacklist or use opcache_invalidate(): if (function_exists("opcache_invalidate")) opcache_invalidate($file, true); We may also hack OPCache similar to APC, but I'm not sure it's the right way. ------------------------------------------------------------------------ [2013-11-21 22:01:45] nanobreaker at mail dot bg I have the same problem. If I change a file nothing happens. For development purposes I tried to disable OPCache, but that doesn't work as well. Only way I can fix this problem is by rebooting the system. Details: Ubuntu Server 13.10 x64 PHP 5.5.3 Apache 2.4.6 ------------------------------------------------------------------------ [2013-11-19 14:04:26] arjen at react dot com -d opcache.revalidate_freq=0 will result in OPcache checking for updates on every request. You change the content DURING the request, so OPcache won't check for updates during the request. http://www.php.net/manual/en/apc.configuration.php#ini.apc.stat "This defaults to on, forcing APC to stat (check) the script on each request to determine if it has been modified." Reads the same as opcache.revalidate. Because of your bugreport I guess apc.stat=1 checks the file on disk for modification on every include/require. And not just once per request, which is quite different.. ------------------------------------------------------------------------ [2013-11-19 13:52:48] zoeslam at gmail dot com Well, just tested with php -d opcache.enable=1 -d opcache.enable_cli=1 -d opcache.revalidate_freq=0 test.php and the result is the same, int(1), so the issue is still alive. ------------------------------------------------------------------------ [2013-11-19 13:46:45] Terry at ellisons dot org dot uk Why is this a problem? This is the analog of apc.stat. The only material difference here is that apc.stat=1 by default. OPcache defaults are different, but this is clearly documented. If you want OPcache always to revalidate scripts, then set opcache.revalidate_freq=0 as per README and documentation. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=65559 -- Edit this bug report at https://bugs.php.net/bug.php?id=65559&edit=1