my clusters both cpu and memory is too heavy,querys slow and even timeout happen sometimes,
ES cluster 2 nodes
ES Version: 5.1.0
Total size of open indices: 28GB
CPU: 4 core intel
ES HEAP SIZE=8g
total docs （logs mainly）is about 30，000，000+ total, 50,000+ per 15minutes
how can do to solve this, should I add a new node ?
as my machine setup ,what is the max number of total logs, so to know when to add a new node ?
thanks for any suggestions