PHP and CPU processing time Help

[rremm2000]

Hello thanks for reading my question

I'm on a share host and they just move my site to a junk server because they said that I'm using to much cpu related to php

User: me
Domain: mysite.com
CPU%: 1.43
MEM%: 0.88
MySQL: 0.6
Top Process %CPU 16.0 /usr/bin/php
Top Process %CPU 15.0 /usr/bin/php
Top Process %CPU 10.2 /usr/bin/php

A whole 1.43 % wow, that is a lot....LOL but being a good person I went back through my scripts and added in a nice little cache system, which cached each page and at the top of the script it checks for the cached file, if there it use it base on file time stamp.
The time is in second and I have it do an update about 1 -4 weeks depending on file cache.

So I ask the to check again and I get this

Hello
Here is your resource usage: wich is very hight
mydi mysite.com 
CPU%: 3.15 
MEM%: 1.70 
MySQL: 0.9
Top Process %CPU 50.0 /usr/bin/php
Top Process %CPU 48.0 /usr/bin/php
Top Process %CPU 44.0 /usr/bin/php

It's very high, please continue to make optimization and also you can try to block spiders and search bots

Thank you

Being that I am an electronic engineer and I do understand how servers work electrically but I'm not an expert in software end of it. However, I believe this is just a load of bull pucky and it is nothing more that hosts trying to line thier pockets by forcing you to upgrade.

I have about 15,000 pages and about real visitors a day plus bots.

The stupid statement about can try to block spiders and search bots
is laughable......LOL....what the heck is the point to having a website then??

Anyway, I would like to know why caching most of my pages would increase CPU usage, this seem impossible, and I believe they have their servers set up wrong and trying to cram too many sites on to one server.

So does anyone know how or why cache would increase CPU time?

What areas should these people be looking at to optimize their server?

What else can I do to reduce CPU/PHP usage in my scripts

[planetsim]

If setup right cache shouldn't be doing that however without seeing how you are caching your site its impossible to say. Its hard to say without knowing more details about their server but they should at a minimum have some sort of optimizer e.g. zend optimizer.

What are you doing in your php scripts exactly ? Again its impossible to say without more details.

[rremm2000]

Here is my cache script

On the top of each page that is being cached I have the following, this is worst case because on the profile pages we allow voting so we want to update the cache if they are voted on i.e. that is what the POST[vote] is for to update the cache. This isn't used too often, maybe 2 people a day our of our 1000 visitors a day.

        $CryptAppend = str_replace( 'cache=11&', '', $_SERVER['REQUEST_URI'] );
        $CryptAppend = str_replace( '?cache=11', '', $CryptAppend );
        $PageID = $_page['name_index'] . '_'.$ID.'_profile'.$PageNameAdd. '_'.md5($CryptAppend);  #24hrs

    IF ( !IsSet($_POST['vote'] ) ) {
         IF ( useCache( $PageID, 10368000 ) ) { #120days
              $Cache = $dir['root'].'cache/'.$PageID . CACHE_EXT;
              include_once( $Cache );  //--  External Script includes
              EXIT();
         }
    }

The script for use cache is as follows

FUNCTION useCache( $PageID, $ExpireIn = 2419200  ) //28DAYS DEFAULT
{
    GLOBAL $dir;
    GLOBAL $logged;

  $AdminCacheFile = FALSE;

    IF ( ( (int)$_GET['cache'] === 11 ) AND ( $logged['admin'] = member_auth( 1, FALSE ) ) ){
         $AdminCacheFile = TRUE;
    }

    $Cache = $dir['root'].'cache/'.$PageID.CACHE_EXT;

    $DateNowUnix = strtotime( date('Y-m-d H:i:s') );

    IF ( @file_exists( $Cache ) AND !$AdminCacheFile ) {

         $CacheDate = filemtime( $Cache );

         $ExpTime = $DateNowUnix - (int)$CacheDate;

         IF( $ExpTime > $ExpireIn ) {
              clearstatcache(); //-- ONLY NEED TO CLEAR IF UPDATING
              RETURN FALSE;        //-- update cache
         }ELSE{
              RETURN TRUE; //-- OK TO USE CACHE FILE
         }

    }ELSE{
         RETURN FALSE;  // create the cache
    }

}

To create the cache
once the template engine is finished it echos out the html like so

        IF ( !EMPTY ( $PageID ) ){
             cachePageCreate( $templ  );
        }
        ECHO $templ;

Now to create the cache page

FUNCTION cachePageCreate( $Content )
{
GLOBAL $dir;
GLOBAL $PageID;

    $Cache = $dir['root'].'cache/'.$PageID. CACHE_EXT;

    $f = @fopen($Cache, 'w');
         @fwrite($f, $Content );
         @fclose($f);
}

if cache=11 and admin is logged in then that allows the admin to create a cached page from the url....kinda helpful.

CACHE_EXT = '.te' for the file extention

[NogDog]

Question: are the "after cache" stats from the same server as "before cache", or are they from the so-called "junk server"? If not from the same server, then the comparison of CPU usage is rather meaningless, since presumably you are running in a different environment.

If there really is a CPU usage issue, I would think it would more likely be in intensive loop constructs, creation/manipulation of large arrays, and other such resource-hungry activities.

[rremm2000]

Far as I know the cpu values are the same, they moved me then sent the results as I was modified my scripts and it took me a day to figure out how to approach the problem.

all the for, foreach, while loops + sql queries + arrays + disk hits was kind of what I thought too, so I even cache my search results using the
md5( $_SERVER['REQUEST_URI'] );
and appending it to the file name.

So that way the heavy stuff get's cached and the search results are where all the really heavy stuff goes on, zip code and thousands of profile etc...But with all that the CPU usage goes up....

I think lunarpages is is hosed up and/or possibly lacking the experts needed to maintain their servers. The other thing I thought is maybe the script they are using to determine CPU usage is skewing the results. But of course they don't want to even consider any other possiblility.

So, beside caching my pages what else could I do, I was thinking about adding

usleep(1000); to my header so before anything starts the header puts a delay in to all the cpu to relax a bit...lol

do you think this would help at all?

do you know of anything else that would cause this?