dumping the cache contents

[Ray Krueger]

That's briiliant :)



On 6/10/08, Ludovic Levesque <luddic at gmail.com> wrote:
> Hi Grant,
>
> you can have a little data usage report sniffing the network:
> ngrep -W none -T -d any "^(get|set|delete|END|STORED|VALUE|DELETED)"
> port 11211 | awk '{print $1 " " $2}'
>
> or without the awk.
>
> It's just plain keys and return values, but it can be useful to have a
> look at what is used in cache.
>
> Hope it helps
> Ludo
>
> On Tue, Jun 10, 2008 at 5:13 PM, Grant Maxwell
> <grant.maxwell at maxan.com.au> wrote:
>> thanks for the really fast response folks.
>> I want it mostly for auditing, health checking and keeping an eye on the
>> cache during this early implementation phase. Being able to cast an eye
>> over
>> some of our scalar entries would be particularly useful in this regard. If
>> we could access the cache we could create summarised data usage reports
>> and
>> develop a sense of how the cache looks over time (trends) which would be
>> better than just the stats.
>> For example we have a scalar list with a counter. We just look to see if
>> the
>> counter exists and if it does we increment it. But the keys are (except
>> for
>> the prefix) dynamic and so we can't have a program which looks at the
>> cache
>> data (without knowing the keys) to generate a normal curve for the
>> specific
>> key hits. I know there are other ways to do this but I think the cache is
>> the logical place to get the info from. Being able to analyze some of this
>> data will also help us to learn about what is effective to have in the
>> cache
>> and what is not.
>> regards
>>
>> Grant Maxwell
>>
>> On 11/06/2008, at 12:56 AM, Robert Swarthout wrote:
>>
>> As far as I know there is not a way to dump the contents of the cache even
>> by using a prefix of the key.
>>
>> -Robert
>>
>>
>> On 6/10/08 10:50 AM, "Grant Maxwell" <grant.maxwell at maxan.com.au> wrote:
>>
>> Hi again
>>
>> A bit more on this - Even if I could match a partial key. All my keys
>> start
>> as some string for example "ACA:mykey". If I could extract all "ACA:" type
>> keys that would be very helpful. Almost all my keys/values are scalars.
>> thanks
>>
>>
>>
>> Grant Maxwell
>>
>> P <mailto:joel.punch at nexos.com.au> please consider the environment before
>> printing this e-mail
>>
>>
>> On 11/06/2008, at 12:45 AM, Grant Maxwell wrote:
>>
>> Hi folks
>>
>> I am a new user for memcached - love it already. We are experiencing a
>> better than expected hit rate. This is reducing load on sql and dns RBL
>> lookups across several machines. Magic.
>>
>> Could you let me know if it is possible to dump out the contents of the
>> cache ? I tried the following but without success. I thought it might
>> return
>> a hash of it all.
>>
>> my  $memd = new Cache::Memcached {
>> 'servers' => [ "localhost:11211" ],
>> 'debug' => 0,
>> namespace => 'myCache:'
>> };
>>
>> my $cache=$memd->get('myCache');
>> print Dumper $cache;
>>
>> Just a point here - I have been programming in various languages for 20+
>> years but perl is new to me so I might be overlooking an obvious :).
>>
>>
>> regards
>>
>>
>>
>> Grant Maxwell
>>
>> P <mailto:joel.punch at nexos.com.au> please consider the environment before
>> printing this e-mail
>>
>

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