Memcached Statistics on a specific key-value pair stored

[Batti]

Hi there,

I am trying to determine if memcached offers any sort of statistics (like the one we get with "stats") for a specific key/value pair that the user stored into the cache.

These are the stats that I am specifically looking for, for each key/value pair stored in the cache:

1. Last cached time
2. Total hits
3. Server Name.

Is it possible to get this information for each key/value pair stored in the cache?

Thanks a lot !

[Brian Moon]

On 5/11/16 12:38 , Batti wrote:
> Hi there,
>
> I am trying to determine if memcached offers any sort of statistics

> (like the one we get with "stats") *_for a specific key/value pair_*

> that the user stored into the cache.
> These are the stats that I am specifically looking for, for each

> *_key/value pair_* stored in the cache:
>
> 1. Last cached time
> 2. Total hits
> 3. Server Name.
>
> Is it possible to get this information for each *_key/value pair_*

> stored in the cache?
>
> Thanks a lot !
>
>

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Hi,

No, this is not a feature that memcached offers.

--

Brian.
--------
http://brian.moonspot.net/

[Nicolas Motte]

Hi, 

One solution would be to store your stats inside Memcached. 

You would have 

key1->value1

key1_stats1->value_stats1

...

But of course it has an impact on your application, network and storage.

Cheers

Nico (from a smartphone)

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[Subodh Battina]

Hi Brian,

Ok. I wish there was a feature such as that. Thanks for the reply !

-Subodh

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[Subodh Battina]

Hi Nico,

That was a good thought. Thanks !

We did actually think along those lines today, but it seems like with the existing code base, that would be a big change unfortunately ....

The other thing we learnt is that if we did "stats slabs" which gives info on all the slabs, and then did a "cachedump" on each of the slab ids, we could search for the key we are looking for in the "cachedump" result.

And that key entry gives an expiration time, from which we could potentially at least derive Last cached time.

Thanks !

-Subodh

Thanks !

-Subodh

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