Java 出现内存分配失败
If you see that the storm process is getting crashed even though you have enough memory (swap/free) available then you should also check the “/proc/sys/vm/overcommit_memory”
- This switch knows 3 different settings:
=> 0: The Linux kernel is free to over commit memory(this is the default), a heuristic algorithm is applied to figure out if enough memory is available.
=> 1: The Linux kernel will always over commit memory, and never check if enough memory is available. This increases the risk of out-of-memory situations, but also improves memory-intensive workloads.
=> 2: The Linux kernel will not over commit memory, and only allocate as much memory as defined in over commit_ratio.
As sometimes OS kills /crashes a process due to a system OS setting, the system OS memory overcommit setting was 2 (when it should have been set to 0) -