Re: APC with horde/imp: 99.9% miss rate and only one cached file

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Well, downgrading APC from 3.1.3b1 to 3.0.19 fixed it. Working great now!

On 04/08/2010 02:21 PM, Derek Chen-Becker wrote:
> I suspect I've either done something horribly wrong or found a weird
> bug, probably the former. I'm running PHP 5.2.13 on Solaris 10 under
> Apache 2.2.14. Memory usage is 98.8% free (default 1 slice of 30MB).
> Here are stats on the cache:
> 
> Cached Files			1 (288.2 KBytes)
> Hits				4146
> Misses				3579033
> Request Rate (hits, misses)	358.68 cache requests/second
> Hit Rate			0.42 cache requests/second
> Miss Rate			358.26 cache requests/second
> Insert Rate			0.00 cache requests/second
> Cache full count		0
> 
> And here is my config in php.ini:
> 
> extension=apc.so
> error_reporting = E_ALL ^ E_DEPRECATED
> apc.report_autofilter = 1
> log_errors = 1
> 
> If I restart apache, a different file gets cached each time (it rotates
> between a very small subset of all of the PHP files in horde).
> Sometimes, 2 or even 3 files get cached, but I've never had it go above
> 3. I've been googling around and reading the list archives but I can't
> find anything that seems to be related to this. Am I misunderstanding
> the purpose of APC? I thought that it would attempt to cache all PHP
> files that are requested.
> 
> I turned on the report_autofilter in an attempt to diagnose the issue,
> but nothing shows up in the error log. Here is the config as shown by
> apc.php:
> 
> apc.cache_by_default		1
> apc.canonicalize		1
> apc.coredump_unmap		0
> apc.enable_cli			0
> apc.enabled			1
> apc.file_md5			0
> apc.file_update_protection	2
> apc.filters	
> apc.gc_ttl			3600
> apc.include_once_override	0
> apc.lazy_classes		0
> apc.lazy_functions		0
> apc.max_file_size		1M
> apc.mmap_file_mask	
> apc.num_files_hint		1000
> apc.preload_path	
> apc.report_autofilter		1
> apc.rfc1867			0
> apc.rfc1867_freq		0
> apc.rfc1867_name		APC_UPLOAD_PROGRESS
> apc.rfc1867_prefix		upload_
> apc.rfc1867_ttl			3600
> apc.shm_segments		1
> apc.shm_size			30
> apc.stat			1
> apc.stat_ctime			0
> apc.ttl				0
> apc.use_request_time		1
> apc.user_entries_hint		4096
> apc.user_ttl			0
> apc.write_lock			1
> 
> 
> Any help would be greatly appreciated.
> 
> Thanks,
> 
> Derek
> 


-- 
----------------------------------------------------------------------
Derek Chen-Becker
Senior Network Engineer, Security Architect
CPI Corp, Inc.
1706 Washington Ave
St. Louis, MO 63103
Phone: 314-231-7711 x6455
Fax:   314-613-6724
dbecker@xxxxxxxxxxx
PGP Key available from public key servers
Fingerprint: E4C4 26C0 8588 E80A C29F  636D 1FBE 0FE3 2871 4AE8
----------------------------------------------------------------------

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