Lots of DB requests when cache expires...

Brad Oaks bradoaks at gmail.com
Wed Oct 10 10:58:39 UTC 2007

Hi Olga,

You ask a good question.  Have a look at the solution described here
and let us know if that works for you.

The solution that I had come up with and still use is described at

Best of luck,

On 10/10/07, Olga Khenkin <olga at metacafe.com> wrote:
> Hi,
> When some popular object expires from memcached, all its customers try to
> retrieve the object from database simultaneously, and the database becomes
> overloaded.
> If this object is requested about 100 times in a minute, and if the process
> of receiving it from DB, processing and storing in cache takes about a
> minute, then the database receives 100 identical queries.
> Do you have this problem? How do you handle it?
> Thank you in advance,
> Olga.

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