From: normadize at gmail dot com
Operating system:
PHP version: 5.5.0beta1
Package: opcache
Bug Type: Feature/Change Request
Bug description:BIG Request: files or memcached based storage (please read
before dismissing)
Description:
------------
Now that Zend Optimizer Plus will make it to 5.5, I think it's time to
resurface this discussion. PLEASE do read it before dismissing it.
Time changed. There are a lot of SuPHP (and the likes) installations out
there that suffer from horrible performance ... and as we know, all current
opcode cachers fail. SuPHP and the likes now account for quite a lot of php
installations, a really non-negligible number.
All those installations would greatly benefit from a storage engine that
survives between requests. Both users and hosting providers would be
extremely grateful!
There are so many slow and badly written but still very popular scripts out
there cough like WordPress cough, especially when they have all sort of
other popular and slow plugins being executed as part of a single request.
This tends to be the norm now with websites based on WordPress, Drupal, etc
... and a ton of them are hosted in SuPHP setups.
I know the cons of file-based storage but let's reconsider it for a
moment.
MEMCACHED.
would be a nice solution but most probably (especially for SuPHP
environments), hosting providers won't allow it or won't provide it at all
since it would be a memory hog as clients fill up the server's RAM with
cached php opcode.
It would still be great to have as a storage engine though.
FILE-BASED.
Everybody says cache hits would be slow. And yes, they would slower than
SHM. However:
it would still be considerably faster than loading and executing an
entire chain of scripts long scripts, e.g. WordPress + tons of plugins (all
those php files have to be read anyway without an opcode cacher)
The OS would cache the opcode files transparently in its file cache --
and hosting providers will not disable that as they don't want their disks
thrashed -- so this would actually be pretty much as fast as SHM-based
solutions as long as the files are in the OS's file cache. On average, it
would still be considerably faster than without any opcode cache at all ...
probably on par with a Memcached-based cache which incurs network latency.
The OS would automatically take care of wiping the oldest accessed
files from its file cache when memory fills up, so garbage collection would
be pretty simple.
This solution would be great since the server's memory won't be hogged (as
opposed to memcached or SHM-based solutions), and it would not require any
dependencies for it to run (as opposed to memcached).
Both users and providers alike would enjoy a faster service + less
resources hogged. It would be a great compromise for those numerous
SuPHP-and-friends setups.
I know that tons of people would employ such a solution if it existed!
Hoping you'll consider this.
Cheers.
p.s. I remember when eAccelerator had file-based storage and it was making
a great deal of difference for such big and slow scripts. Now there is no
PHP opcode cache (that I know of) which works with SuPHP.
--
Edit bug report at https://bugs.php.net/bug.php?id=64502&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64502&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64502&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64502&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64502&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64502&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64502&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64502&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64502&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64502&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64502&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64502&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64502&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64502&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64502&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64502&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64502&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64502&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64502&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64502&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64502&r=mysqlcfg
