Comments on: An Introduction to memcached

By: stealther

stealther — Fri, 20 Nov 2009 11:30:50 +0000

what about using database triggers to keep cache up to date?

By: Himel

Himel — Fri, 18 Sep 2009 04:36:01 +0000

Hi MrSpooky Can you refer me some more elaborated tutorial or links about memcached. I have checked Danga … but haven’t found it to be useful for a beginner level database operation.

Thanks in advance.

By: jsonx

jsonx — Wed, 09 Sep 2009 02:20:33 +0000

Thanks for clear explanation.

By: shridhar

shridhar — Sat, 22 Nov 2008 06:52:52 +0000

how to store a file(text,word,pdf) within a Memcache and how to use the cached data without creating the file.

By: Unicorn

Unicorn — Wed, 19 Nov 2008 05:38:27 +0000

Hi,
What do i do when place when am hosting does not have memcache

thanks in advance

By: vicky

vicky — Wed, 05 Nov 2008 12:07:57 +0000

Thanx a lot bro… tat was just wat i wanted to start off…

By: asheshb

asheshb — Fri, 23 May 2008 12:12:52 +0000

Hi MrSpooky,

Indeed a very useful article with everything in one place and very concise, to show how to implement memcache.

thanks

By: jc clairotte

jc clairotte — Thu, 15 May 2008 11:38:31 +0000

I didn’t think it was so easy to implement. Great tutorial.

By: MrSpooky

MrSpooky — Tue, 01 Apr 2008 01:51:32 +0000

One tidbit that might apply to a couple of the above comments.

You can store any object, array or value that can be serialized into a string, so the only things you can’t store in memcache are file handles and database connections (although wouldn’t it be sweet to be able to pool DB connections in PHP with memcache?)

The max size of any value in memcached is 1MB, so large result sets from the DB won’t fit (trust me, I’ve tried).

By: Sathyan Catari

Sathyan Catari — Mon, 31 Mar 2008 18:46:32 +0000

Great piece of tutorial to help start anyone on memcached.

By: Elijah

Elijah — Fri, 14 Mar 2008 16:46:22 +0000

Great easy to follow & implement tutorial! I’ve recently been working with setting up memcached to store common result sets for categories & products. What happens, however, if you wish to retrieve & cache a very large result set such that your memory limit for process size is reached? This issue doesn’t come up when using “while($result = mysql_query($query))” as $result is set to the next record on each iteration. But if you store every row & column into an associative array before saving to cache, then you can see where large result sets might be problematic. An example of this would be showing ALL categories & products of an ecommerce store on one page for printing purposes.
Cheers!

By: Saurabh

Saurabh — Wed, 27 Feb 2008 13:04:36 +0000

Hi,

Its a nice tutorial to get started. But I would like to know how can I store the entire results of a database query in memcache. Can I store the resultset object or I need to first put all the values in an array and then store that array in memcache?

By: Richard

Richard — Tue, 26 Feb 2008 10:41:21 +0000

Thanks for this tutorial, I was about 30 minutes searching for just this sort of thing to get me started with memcached.

By: manoj

manoj — Fri, 08 Feb 2008 05:04:46 +0000

thanks for reply.how i update value in memcache when new insertation should take place.suppose i store
all company that is started with ‘A’ in memcached. i want to know that when new company is added with ‘A’ then how i update memcached for that. i have set one key for all value of ‘A’.how i update that key value.
please help me.plese send me full description
of memcached using.

By: MrSpooky

MrSpooky — Thu, 07 Feb 2008 15:01:53 +0000

@manoj: Without looking at your code, I couldn’t really recommend the best course of action, but in general implementing the above example would populate the cache after the first “select” on the new data, but if you absolutely must get it into memcache, then just perform a select immediately after inserting/updating and populate the cache with the results.

If ou are doing a delete, then just use $memcache->delete($key); to expire the entry in the cache.