[Behrooz_Ice]

Originally Posted by DragonByte Tech

Memcache is better, but it's a gigantic pain in the arse to set up as you yourself have experienced. I cannot help you diagnose problems in your Memcache setup

I recommend trying out APC cache - Memcache is only better if it's running on a separate server entirely.

No, it will take up more RAM in order to speed up your site
Unused RAM is wasted RAM, so you will always want your RAM filled up with data so that the server doesn't have to query MySQL (hard disk lookup) as that is orders of magnitude slower than reading from RAM.

To put things into perspective, DDR-3 SDRAM has a maximum transfer rate of 6400 MB/s. The fastest SSDs on the market (discounting RAID setups) has a maximum transfer rate of 550 MB/s.

You shouldn't ask for anything to take up less RAM for this reason

Sorry, I don't understand what you're asking. Can you please clarify?


Fillip

i installed APC OpCode cache and i'm using that now but we got error in "System Test" after 5min:

vB Optimise: Test Setup
Running Test: Connection to apc
Test completed successfully
Running Test: Store Cache
Test completed successfully
Running Test: Fetch Cache
Your Opcache Operator extension is functioning, however it is unable to store data. Please check your extension configuration.
Running Test: Flush Cache
Test completed successfully

its my phpinfo page:

apc
APC Support	enabled
Version 	3.1.9
APC Debugging 	Disabled
MMAP Support 	Enabled
MMAP File Mask 	no value
Locking type 	pthread mutex Locks
Serialization Support 	php
Revision 	$Revision: 308812 $
Build Date 	Jan 14 2013 12:12:59

Directive	Local Value	Master Value
apc.cache_by_default	On	On
apc.canonicalize	On	On
apc.coredump_unmap	Off	Off
apc.enable_cli	Off	Off
apc.enabled	On	On
apc.file_md5	Off	Off
apc.file_update_protection	2	2
apc.filters	no value	no value
apc.gc_ttl	3600	3600
apc.include_once_override	Off	Off
apc.lazy_classes	Off	Off
apc.lazy_functions	Off	Off
apc.max_file_size	1M	1M
apc.mmap_file_mask	no value	no value
apc.num_files_hint	1000	1000
apc.preload_path	no value	no value
apc.report_autofilter	Off	Off
apc.rfc1867	Off	Off
apc.rfc1867_freq	0	0
apc.rfc1867_name	APC_UPLOAD_PROGRESS	APC_UPLOAD_PROGRESS
apc.rfc1867_prefix	upload_	upload_
apc.rfc1867_ttl	3600	3600
apc.serializer	default	default
apc.shm_segments	1	1
apc.shm_size	32M	32M
apc.slam_defense	On	On
apc.stat	On	On
apc.stat_ctime	Off	Off
apc.ttl	0	0
apc.use_request_time	On	On
apc.user_entries_hint	4096	4096
apc.user_ttl	0	0
apc.write_lock	On	On

but when i see Resource Statistics menu; it show me blank data yet!
should i change somethings in vbulletin config.php file?