Using "file" engine make the performance poor
mburak - April 10, 2008 - 21:22
| Project: | Cache Router |
| Version: | 5.x-1.0-beta4 |
| Component: | Code |
| Category: | support request |
| Priority: | normal |
| Assigned: | Unassigned |
| Status: | by design |
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Description
I installed a brand new drupal 5.7 and added the Cache Router module.
I did the same performance tests as there are in the module page. Performance with "db" engine is not bad for me:
Requests per second: 324.03 [#/sec] (mean)
Time per request: 15.431 [ms] (mean)
But when i do the same performance test with "file" engine, the performance is very bad:
Requests per second: 12.88 [#/sec] (mean)
Time per request: 388.210 [ms] (mean)
This is what id added to settings.php:
$conf['cache_inc'] = './sites/all/modules/cacherouter/cacherouter.inc';
$conf['cacherouter'] = array(
'default' => array(
'engine' => 'file',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
),
);Am i missing something?
Regards,
Matias.
#1
Also, i found these errors in my log file.
==> /etc/httpd/logs/error_log <==
[Mon Apr 14 12:02:01 2008] [error] [client 127.0.0.1] PHP Notice: Undefined index: in /mnt/20GB/local/dpc-solution/drupal/sites/all/modules/cacherouter/engines/file.php on line 14
[Mon Apr 14 12:02:01 2008] [error] [client 127.0.0.1] PHP Notice: Undefined index: cache in /mnt/20GB/local/dpc-solution/drupal/sites/all/modules/cacherouter/Cache.php on line 12
Thanks,
Matias.
#2
While performance on my local computer seems decent, I continually got these notices as well - I see that there is no checking done on whether or not the cacherouter bin prefix is set or not - so I added some checks for the prefixes to the effect of:
if (isset($conf['cacherouter'][$bin]['prefix'])) {...
}
And the warnings are no longer there. While I have only used apc and file caching, the differences were in:
#3
I'm sorry, I've been out of the loop for a week due to some personal issues. I will take a look at this asap.
#4
Hi, did you apply the cache serialization patches? Did you check write permissions for the "path" to the cache files?
-s
#5
Ack...I should have created a warnings thread for the 6.x branch - The warnings and notices that I received were from the 6.x branch - that is where I needed to place the isset() checks.
#6
Yes, i applied the patches but it's still not working. I have the right permissions to write in /tmp/filecache and i see that it's writing things there.
#7
I changed Cache.php
<?php
function __construct($bin) {
global $conf;
$this->name = $bin;
//Check for bin in config
if (isset($conf['cacherouter'][$bin])) {
$this->prefix = $conf['cacherouter'][$bin]['prefix'];
}
else {
$this->prefix = $conf['cacherouter']['default']['prefix'];
}
}
?>
#8
Based on the problems I was having, it appears to be because the 'page_cache_fastpath' variable is not set. Although it doesn't seem to be documented anywhere, you need to have a variable namde page_cache_fastpath set to '1' or else the file caching (and possible other engines) don't work at all
#9
That is to say, you want to add this to your settings.php:
$conf['page_cache_fastpath'] = 1;#10
#11
Can the documentation for the project be updated in this case?