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Bug #62850 APC 3.1.12, corrupted stat
Submitted: 2012-08-18 06:00 UTC Modified: 2016-08-31 16:09 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: remi@php.net Assigned: cmb (profile)
Status: Wont fix Package: APC (PECL)
PHP Version: 5.4.6 OS: GNU/Linux
Private report: No CVE-ID: None
View Developer Edit
 [2012-08-18 06:00 UTC] remi@php.net 
Description:
------------
After some time running on a web server, I notice strange results (using control panel)


apc.shm_size	128M
Cached Files 312 ( 16.1 MBytes)
Cached Variables 0 ( 0.0 Bytes)

But :
Free: 155.8 MBytes (121.7%)
Used: -29145544.0 Bytes (-21.7%)

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 [2012-08-18 06:10 UTC] remi@php.net 
apc_sma_info:
Array
(
    [num_seg] => 1
    [seg_size] => 134217592
    [avail_mem] => 163363136
    [block_lists] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [size] => 4280
                            [offset] => 13384584
                        )
                )
        )
)
 [2012-08-19 12:09 UTC] remi@php.net 
After a few time, calling apc.php make apache hangs.
And then all php pages (/server-info, or /server-status still responds)
 [2012-08-21 16:15 UTC] arhimede at gmail dot com 
I noteiced same strange behaviour. Also i got error : "apc_store(): Unable to allocate memory for pool." 
Using the file apc.php, i got negative values for usage .
PHP 5.4.6 , APC 3.1.12
 [2012-08-27 09:06 UTC] remi@php.net 
I'm currently running latest SVN version (3.1.12 + rev327233 and rev327244).

After a few hours (and 200k cache request) I don't encounter this issue.

apc_sma_info:
(
    [num_seg] => 1
    [seg_size] => 134217592
    [avail_mem] => 94959904
    [block_lists] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [size] => 3032
                            [offset] => 31149648
                        )
                    [1] => Array
                        (
                            [size] => 648
                            [offset] => 20677400
                        )
                    [2] => Array
                        (
                            [size] => 3000
                            [offset] => 20342888
                        )
                    [3] => Array
                        (
                            [size] => 94953184
                            [offset] => 39264464
                        )
                )
        )
)

Just notice that sum of block size is not exactly avail_mem.
 [2016-08-31 16:09 UTC] cmb@php.net
-Status: Open +Status: Wont fix -Assigned To: +Assigned To: cmb
 [2016-08-31 16:09 UTC] cmb@php.net 
According to <https://bugs.php.net/69618>, APC support has been
discontinued in favor of OPcache, APCu, the session upload
progress API and WinCache. Therefore this issue won't get fixed.
 
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