Hi,

We are getting multiple errors while more than 1500 connections in mongo db . Its 4 core CPU and 32 GB Ram . While running more connections getting below errors . Please help us on this . Mongo DB version 3.6.9

2019-02-14T16:58:42.647+0600 F - [conn1911] out of memory.
2019-02-14T17:03:36.669+0600 I CONTROL [initandlisten] ** WARNING: /proc/sys/vm/overcommit_memory is 2
2019-02-14T19:08:12.535+0600 F - [conn1634] out of memory.
2019-02-14T19:24:26.481+0600 F - [conn419] out of memory.
2019-02-15T14:56:30.890+0600 F - [conn27879] out of memory.
2019-02-16T00:25:42.818+0600 E STORAGE [thread28378] WiredTiger error (12) [1550255140:820816][1657:0x7fc305e0a700], log-server: __directory_list_worker, 48: /mongodb/dtpreprod//journal: directory-list: opendir: Cannot allocate memory
2019-02-16T00:25:48.684+0600 E STORAGE [thread28378] WiredTiger error (12) [1550255147:597488][1657:0x7fc305e0a700], log-server: __log_archive_once, 409: log archive server error: Cannot allocate memory
2019-02-16T00:25:56.369+0600 E STORAGE [thread28378] WiredTiger error (12) [1550255155:364572][1657:0x7fc305e0a700], log-server: __log_server, 1015: log server error: Cannot allocate memory
2019-02-16T00:29:18.759+0600 F - [conn26990] out of memory.