LoopBack consume CPU & Memory

I'm using Loopback + NodeJS for my mobile backend system.

Currently I'm testing in UAT environment with Server Spec (VM) : - 2 Core (CPU) - 1.995 CPU MHz - 4 GB Memory

I have 2 UAT MongoDB (separate server with Loopback) with each statistic :

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{ "db" : "A", "collections" : NumberInt(35), "views" : NumberInt(0), "objects" : NumberInt(59018291), "avgObjSize" : 254.90223315683608, "dataSize" : 15043894173.0, "storageSize" : 4575064064.0, "numExtents" : NumberInt(0), "indexes" : NumberInt(59), "indexSize" : 1891119104.0, "ok" : 1.0 }

{ "db" : "B", "collections" : NumberInt(33), "views" : NumberInt(0), "objects" : NumberInt(316693), "avgObjSize" : 216.2786042002823, "dataSize" : 68493920.0, "storageSize" : 21401600.0, "numExtents" : NumberInt(0), "indexes" : NumberInt(34), "indexSize" : 3956736.0, "ok" : 1.0 }

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When I use DB "B", CPU usage on Loopback is 0% with no request. When I change to DB "A", CPU usage on Loopback is 50% with no request (99% on NodeJS / Loopback process)

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top - 05:42:12 up 19:59, 4 users, load average: 0.58, 0.64, 0.61 Tasks: 137 total, 2 running, 135 sleeping, 0 stopped, 0 zombie %Cpu(s): 47.0 us, 2.0 sy, 0.0 ni, 50.2 id, 0.0 wa, 0.0 hi, 0.8 si, 0.0 st KiB Mem: 4056212 total, 999168 used, 3057044 free, 876 buffers KiB Swap: 561148 total, 0 used, 561148 free. 323368 cached Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

5068 root 20 0 1426748 341212 11784 R 97.33 8.412 8:27.13 node /hom+

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99% without any request on that loopback server. Is that normal? Because when I see MongoDB log there is no log process & there is no CPU & Memory consumable on MongoDB.

Need Help. :)

Thank You.

via Xnuxer