Memcached implementation inquiry

Lexington Luthor lexington.luthor at
Sat Apr 21 11:56:09 UTC 2007

marc at wrote:
> Hi,
> mysql's scaling problem, especially on Linux, was recently found to be a 
> sub-optimal implementation of malloc when it comes to threads.
> If you preload google's malloc lib for mysqld you'll see a huge 
> difference past ~1000 TPS allowing it to scale almost linearly as well.
> Search for 'mysqld google malloc'

At what kind of (OLTP) load does mysql begin to be hampered by lock 
contention? Can you link to any thorough tests done to find this out? 
Every test that I can find using google seems to be done by mysql 
themselves or storage engine vendors, which are no doubt biased.


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