Set cluster scheduling policy on Windows

[m-mohamedin]

What's going wrong?

On Windows, cluster scheduling is disabled and only one worker gets the entire load of requests. This can be fixed by setting cluster.schedulingPolicy = cluster.SCHED_RR; or the environment variable NODE_CLUSTER_SCHED_POLICY=rr. I tried the environment variable as a system global variable but it didn't work.

How could we reproduce this issue?

Run clustering on Windows and monitor the workers log.

Supporting information

--- PM2 report ----------------------------------------------------------------
Date                 : Fri Jan 14 2022 01:52:29 GMT+0000 (Coordinated Universal Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 5.1.2
node version         : 16.13.1
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\ProgramData\pm2\service\index.js
argv0                : C:\Program Files\nodejs\node.exe
user                 : undefined
uid                  : N/A
gid                  : N/A
uptime               : 1827min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 5.1.2
node version         : 16.13.1
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\ProgramData\npm\npm\node_modules\pm2\bin\pm2,report
argv0                : node
user                 : Administrator
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : win32
type                 : Windows_NT
cpus                 : AMD EPYC 7571
cpus nb              : 8
freemem              : 28164399104
totalmem             : 34074025984
home                 : C:\Users\Administrator
===============================================================================

[developedbysom]

Hi,

Same issue experienced. I realized, the process id will be distributed if concurrent request been made for e.g.

loadtest -n 4 -c 4 --rps 4 http://localhost:3000

if I created node with clustering then cluster.schedulingPolicy = cluster.SCHED_RR; works nice for windows. So PM2 with execution mode as clustering with environment variable as NODE_CLUSTER_SCHED_POLICY=rr should also work!

• Thanks, Somnath