[wp-hackers] Incredibly High PHP Creation Times on WP SVN?

[Computer Guru]

Yeah, I think there's something wrong with my machine... It's barely under any load, but IO times are horrid.
I had taken my XCache-plugin for WordPress down two weeks ago for maintenance and was too lazy to put it back, but now I'm using memory-based object caching and it's a lot faster. 100 times faster. Literally. ;-)

However, even with memory-based caching many things that require accessing the HD are still taking too long. Page loads are at 1second now, which is still too long - relatively speaking. I just don't get why other disk-intensive scripts aren't as affected - especially stuff like Gallery2 which are considered to be both db- and disk-heavy...

Thank god I don't have any MySQL server performance issues to add to the mix! 

I'm not sure what's giving me these IO problems (fully defragged, write caching enabled, drivers installed, local drive, etc), but I've already requested a new server from my host (long live Lunarpages :P) so that's that.

Computer Guru
NeoSmart Technologies
http://neosmart.net/


> -----Original Message-----
> From: wp-hackers-bounces at lists.automattic.com [mailto:wp-hackers-
> bounces at lists.automattic.com] On Behalf Of DD32
> Sent: Friday, October 05, 2007 9:58 AM
> To: wp-hackers at lists.automattic.com
> Subject: Re: [wp-hackers] Incredibly High PHP Creation Times on WP SVN?
> 
> On Fri, 05 Oct 2007 16:47:03 +1000, Omry Yadan <omry at yadan.net> wrote:
> > Getting a file lock can potentially take a very long time, if other
> > processes are holding the lock for a long time.
> > this may be a symptom caused by another problem.
> > _______________________________________________
> 
> It can potentially take a long time if someone else has it locked.. But
> I didnt think you could open a file(for writing) if its locked?
> 
> The Object cache locking function:
> 	function acquire_lock() {
> 		// Acquire a write lock.
> 		$this->mutex = @fopen($this->cache_dir.$this-
> >flock_filename, 'w');
> 		if ( false == $this->mutex)
> 			return false;
> 		flock($this->mutex, LOCK_EX);
> 		return true;
> 	}
> 
> The object cache can slow your site down significantly if your using a
> non-local(eg Network or SAN) filesystem, Or if you've got high IO load
> on the server, Thats why it isnt enabled by default. However it can be
> a great speed boost if your MySQL server has speed issues.
> 
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