jim wrote:
Which RAM type(buffered, un-registered or FB DIMM) is better for memcached server?
I'd venture to say for 99%+ deployments, it doesn't really matter. The network is the largest limiting factor in both latency and throughput for memcached performance. $/GB is probably your best metric.
What's max RAM size that memcached server can support?
memcached is 64-bit (pass the --enable-64bit at configure time), so then it's down to whatever the limiting factor or the OS/platform you're running on. 64GB has often been deployed and tested. I've personally seen even more in lab environments. Back to what I said above though, the $/GB tends to go up with higher densities per system. The operational cost can be a factor here too... consider DDR2 power consumption compared to FB-DIMM.
Is there a more specific problem you're trying to solve? - Matt
