warning: MemcachePool::getextendedstats()

I get the same thing (except it is line 113.)

Subscribing.

Drupal Version: 6.10
Memcache API and Integration: 6.x-1.2
PHP: 5.2.9-0
Lighttpd server (on Ubuntu 8.10 x_64)
Memcached: 1.2.2
memcache pecl library: 2.2.5

Everything seems to be working except the stats.

Hi,

similar error here:

warning: MemcachePool::getextendedstats() [memcachepool.getextendedstats]: Invalid stats type in /usr/local/www/drupal/sites/all/modules/memcache/dmemcache.inc on line 113.
No available statistics for this bin.

OS: FreeBSD 7.1-RELEASE-p4
Drupal Version: 6.12
Memcache API and Integration: 6.x-1.2
PHP: 5.2.8 with Suhosin-Patch 0.9.6.3
Lighttpd: 1.4.22 <-- someone having this problem with Apache?
Memcached: 1.2.8
memcache pecl library: 3.0.4
MySQLi 5.0.75

Greetings, -asb

I'm getting this also. I have current versions of everything, running LAMP on centos.

Here is my config...

$conf = array(
              'cache_inc' => './sites/all/modules/memcache/memcache.db.inc',
              'memcache_servers' => array(
                        'localhost:11211' => 'default',
                        'localhost:11212' => 'filter',
                        'localhost:11213' => 'menu',
                        'localhost:11214' => 'page',
 
              ),
              'memcache_bins' => array(
                        'cache' => 'default',
                        'cache_filter' => 'filter',
                        'cache_menu' => 'menu',
                        'cache_page' => 'page',
 
              ),
....

Also, our server is 64-bit so we thought that might be something that could be different between our servers. Not sure how that would affect memcache but thought it might be a helpful clue in some way.

@2440media2

I recently moved over to a 32 bit server from a 64 bit server and I am still having the same issue.

@bacchus101 - I can confirm that memcache is running using this tool (http://livebookmark.net/journal/2008/05/21/memcachephp-stats-like-apcphp/) - though I'm getting more misses than hits - how about you?

Actually, memcache is running "fine" for me and I am using the same tool (80% default, 80% page and 91% filter hit rate.)

That is why this statistic error is more of an inconvenience than an actual problem (although it would be nice if it worked.)

Subscribing

This appears to be working for me now. Turns out that we were on a 3.x version of the PECL Memcache so the solution was to downgrade to 2.2.5 and flush the cache. We're getting more hits than misses now. The only one that is off is the filter which has almost no hits...still working on that one.

Subscribing, same error. My system:

OS: Debian 5 (Lenny)
Drupal: 6.13 (more or less fresh)
Memcache API: 6.x-1.2
PHP: 5.2.6-1 with Suhosin-Patch 0.9.6.2
Apache: 2.2
Memcached: 1.2.8
memcache PECL lib: 3.0.1
MySQLi: 5.0.51a

check your version of memcache PECL lib - 3.x seemed to be the problem

Agreed, rolled back to pecl-memcache 2.2.5 and it fixed the problem. Seems to be the solution. Too bad

According to the memcached protocol spec these additional arguments "are subject to change for the convenience of memcache developers".

makes it sound like there might not be an elegant solution for the Drupal module to handle the difference.

This is a result of changes in the PHP PECL Memcache extension starting with version 3.0. A look through the source code for the PHP Memcache extension yields this function in memcache.c:

static int mmc_stats_checktype(const char *type) { /* {{{ */
	return type == NULL ||
		!strcmp(type, "reset") ||
		!strcmp(type, "malloc") ||
		!strcmp(type, "slabs") ||
		!strcmp(type, "cachedump") ||
		!strcmp(type, "items") ||
		!strcmp(type, "sizes");
}

The mmc_stats_checktype function is called when the PHP memcache functions memcache_get_stats() or memcache_get_extended_stats() are called and if the mmc_stats_checktype() function returns TRUE then you get the 'Invalid stats type' error reported above.

From the types checklist above you can see that 'maps' is not listed which means that the 'maps' type which works in the PHP PECL memcache 2.x release will not work here. Likewise there does not seem to be a default stats type (an empty string is passed in the Drupal memcache module dmemcache_stats() function in dmemcache.inc when a stats type is not specified).

So it would seem that there's not way to get the basic server stats.

The attached patch works around the stats 'checktype' in the new Memcache extension and results in the basic Memcache stats data successfully displaying. The 'maps' stats type still throws an error because that stats type is no longer available in the 3.x version of the Memcache extension.

This was tested and works for both the 5.x and 6.x memcache modules. If someone who is running the PHP PECL Memcache 2.x version of the extension to verify that the stats still work then I think the main stats problem will be solved across the 2.x and 3.x versions of the Memcache extension.

I can confirm this fixed the problem on PECL 3.x

Thanks for the patch, fix committed. (Sorry, I meant to commit it separately crediting you for the patch, but it slipped into my last commit):
http://drupal.org/cvs?commit=263340

Thanks.