Edit report at http://bugs.php.net/bug.php?id=52312&edit=1
ID: 52312
Updated by: paj...@php.net
Reported by: v dot damore at gmail dot com
Summary: PHP lstat problem
Status: Bogus
Type: Bug
Package: Safe Mode/open_basedir
Operating System: Linux
PHP Version: 5.2.13
New Comment:
The scan of each element of the paths happen anyway, whether the paths
contain symlinks or not. Check the code TSRM/ for a deeper explanation.
Previous Comments:
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[2010-07-12 15:57:54] v dot damore at gmail dot com
@pajoye; as is described in "Actual result" part of this bug, first time
PHP engine check filepath there is a full scan of all directories at
least 4
times before cache the result, this behavior anyway cannot scale in a so
large environment.
@rasmus: this is very interesting, I can consider upgrade to 5.3 in
order to avoid this behavior.
I know this is an extrema ratio: may I disable symlinks support from PHP
engine in order to avoid this behavior?
Is there an answer regarding the increase of realpath_cache_size
realpath_cache_ttl?
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[2010-07-12 15:36:10] ras...@php.net
And like I said, we have made this more efficient in PHP 5.3 because we
now cache
the partial paths separately. You should see a performance improvement
going to
5.3.
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[2010-07-12 15:32:33] paj...@php.net
Again, it does it once and only once per path. When it does it, it
checks each element of a path (and cache each of them too).
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[2010-07-12 14:59:36] v dot damore at gmail dot com
I must also to notify that looking at our production servers in some
cases PHP engine tries up to 8 times before read the file.
Can you explain why PHP engine have this behavior?
There is any way to remove/change this behavior in PHP engine?
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[2010-07-12 14:43:43] v dot damore at gmail dot com
We already tuned cache size to following values:
realpath_cache_size=1024k
realpath_cache_ttl=7200
Can we increase cache size to:
realpath_cache_size=40960k
realpath_cache_ttl=72000
Do you know if memory_limit is affected by realpath_cache_size
increase?
Actually our memory limit is set to:
memory_limit = 96M
But biggest problem we have at moment is when search engines spiders
come to crawling all platform.
In this case all existing pages are crawled by spiders.
Can you suggest us a workaround?
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