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Bug #50733 Garbage Collection fails
Submitted: 2010-01-12 21:32 UTC Modified: 2010-01-13 15:28 UTC
From: elmex at voll dot in Assigned:
Status: Not a bug Package: Session related
PHP Version: 5.2.12 OS: FreeBSD 6.1
Private report: No CVE-ID: None
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 [2010-01-12 21:32 UTC] elmex at voll dot in 
Description:
------------
The Garbage Collection ist set to session.gc_maxlifetime=1440, but there are a lot of session files set are older. In all hosts on the server there is a virtual host setting for session.save_path like session.save_path="/usr/local/www/hostname/phptmp". That is the only session related setting, that was modified. A find for the files shows currently:

find /usr/local/www/ -maxdepth 3 -mindepth 3 -name 'sess_*' -cmin +24 | wc -l
    8443

(amin is the same:)

find /usr/local/www/ -maxdepth 3 -mindepth 3 -name 'sess_*' -amin +24 | wc -l
    8443



Reproduce code:
---------------
no code, just settings

Expected result:
----------------
session files should be deleted after session.gc_maxlifetime or earlier

Actual result:
--------------
session files are not deleted or deleted too late

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 [2010-01-12 22:07 UTC] derick@php.net 
Can you post the other session related settings a well?
 [2010-01-13 14:54 UTC] elmex at voll dot in 
Sure, here they are (from php_info):

Session Support 	enabled
Registered save handlers 	files user
Registered serializer handlers 	php php_binary

Directive	Local Value	Master Value
session.auto_start	Off	Off
session.bug_compat_42	Off	Off
session.bug_compat_warn	On	On
session.cache_expire	180	180
session.cache_limiter	nocache	nocache
session.cookie_domain	no value	no value
session.cookie_httponly	Off	Off
session.cookie_lifetime	0	0
session.cookie_path	/	/
session.cookie_secure	Off	Off
session.entropy_file	no value	no value
session.entropy_length	0	0
session.gc_divisor	1000	1000
session.gc_maxlifetime	1440	1440
session.gc_probability	1	1
session.hash_bits_per_character	5	5
session.hash_function	0	0
session.name	PHPSESSID	PHPSESSID
session.referer_check	no value	no value
session.save_handler	files	files
session.save_path	/usr/local/www/XXXX/phptmp	no value
session.serialize_handler	php	php
session.use_cookies	On	On
session.use_only_cookies	Off	Off
session.use_trans_sid	0	0
 [2010-01-13 15:28 UTC] jani@php.net 
You just misunderstood how the GC works. Your settings mean that GC happening has in 1/1000 chance per request. And that happens only for session files older than 1440 seconds. No bug.
 
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