On Fri, Aug 31, 2012 at 11:27 AM, Peter Schuller < peter.schul...@infidyne.com> wrote:
> > Could these 500 connections/second cause (on average) 2600Mb memory usage > > per 2 second ~ 1300Mb/second. > > or For 1 connection around 2-3Mb. > > In terms of garbage generated it's much less about number of > connections as it is about what you're doing with them. Are you for > example requesting large amounts of data? Large or many columns (or > both), etc. Essentially all "working" data that your request touches > is allocated on the heap and contributes to allocation rate and ParNew > frequency. > > "write requests are simple counter increments" and in memtables existing in memory. There is negligible read traffic (100/200 reads/second). Also, increasing write traffic si the one that increases gc frequency while keeping read traffic constant. So the gc should be independent of reads. > -- > / Peter Schuller (@scode, http://worldmodscode.wordpress.com) >
