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schildi
Smarty Regular
Joined: 11 Mar 2005
Posts: 81
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 Posted: Sun Jun 15, 2008 1:59 pm Post subject: cache_handler_func with mysql |
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hello,
i tried to test the cache_handler_func with mysql, but it does not work as expected. i used the example from http://www.smarty.net/manual/de/section.template.cache.handler.func.php
when i use it within my app it always seems to generate a new cache-file instead of delivering an existing one. maybe the example doesnt include that functionality?
i would be happy, if somebody could help me.
maybe you have a working mysql-implementation?
i want to use mysql, because the file-system-related caching begins to slow down response times from about 15.000 cache-files on (no folders, cause i dont want to disable set safe_mode). file-system is xfs.
i assume a database can handle large number of files better (maybe up to 100.000 - 500.000 files?).
thanks for your help in advance! |
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U.Tews
Administrator
Joined: 22 Nov 2006
Posts: 5068
Location: Hamburg / Germany
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| Posted: Sun Jun 15, 2008 3:19 pm Post subject: |
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I am not sure is caching in a mysql database will have a better performance.
I have had same problem because I wanted to cache pages for thousands of products. I have solved the problem by generating a cache_id from a product id as follow (using subdirs):
| Code: | function get_cache_id ($product_id)
{
$md5 = md5($product_id);
return substr($md5, 0, 2) . '|' . substr($md5, 2, 2) . '|' .substr($md5, 4, 2).'|'.$product_id;
}
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It did provide good performance in my case.
But I can see no reasion why the cache handler should not work if all caching parameters are set correcty. Are you sure that you have force_compile = false? Why are you assuming that always a new cache file is being generated? |
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schildi
Smarty Regular
Joined: 11 Mar 2005
Posts: 81
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| Posted: Sun Jun 15, 2008 8:54 pm Post subject: |
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i hope i will have a better performance. i should try it at least.
i do generate cache_id's by using md5 and the requested url. i include request vars to have the ability to save every page than can be generated.
i dont cache sites, that are "extremly" dynamic atm, cause the file-system cant manage 20.-30.000 cached sites satisfyingly anymore. it really slowed down the whole application some day.
but i want to cache as much as possible pages, because the building of my pages is comparatively complex.
your '|' in the cache-id causes smarty to split the string-parts into single folders? but .. in my case it wont help, i think atm.
i implemented the smarty-example, and didnt changed any other code. although smarty never returned a cached template. i tested that.
i dont know where to start, cause i dont know how smarty works.
maybe the example is too old or something?
i really need hints :/ |
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U.Tews
Administrator
Joined: 22 Nov 2006
Posts: 5068
Location: Hamburg / Germany
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| Posted: Sun Jun 15, 2008 9:59 pm Post subject: |
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I did test the cache handler and found two typo errors...
It must be $cache_content not $cache_contents.
| Code: | case 'read':
// Cache aus der Datenbank lesen
$results = mysql_query("select CacheContents from CACHE_PAGES where CacheID='$CacheID'");
if(!$results) {
$smarty_obj->_trigger_error_msg("cache_handler: query failed.");
}
$row = mysql_fetch_array($results,MYSQL_ASSOC);
if($use_gzip && function_exists("gzuncompress")) {
$cache_content = gzuncompress($row["CacheContents"]);
} else {
$cache_content = $row["CacheContents"];
}
$return = $results;
break;
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schildi
Smarty Regular
Joined: 11 Mar 2005
Posts: 81
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| Posted: Mon Jun 16, 2008 8:14 am Post subject: |
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yihaww!
works now! thanks!
didn't thought of typo errors! |
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