Troubleshooting
Problem
The ICP v3.2 deployed on Power nodes from time to time experiences slow performances with some UI elements.
Command line works better, it never evidences delays.
Looking at the output of ifconfig on the cluster nodes, I noticed lot of packets being dropped
cali049fd204478: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1370
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 0 (Ethernet)
RX packets 267419938 bytes 508053226147 (473.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 213405984 bytes 353451811693 (329.1 GiB)
TX errors 0 dropped 6227797 overruns 0 carrier 0 collisions 0
..
..
tunl0: flags=193<UP,RUNNING,NOARP> mtu 1370
inet 10.1.147.0 netmask 255.255.255.255
tunnel txqueuelen 1000 (IPIP Tunnel)
RX packets 267419938 bytes 508053226147 (473.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 213405984 bytes 353451811693 (329.1 GiB)
TX errors 0 dropped 6227797 overruns 0 carrier 0 collisions 0
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 0 (Ethernet)
RX packets 267419938 bytes 508053226147 (473.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 213405984 bytes 353451811693 (329.1 GiB)
TX errors 0 dropped 6227797 overruns 0 carrier 0 collisions 0
..
..
tunl0: flags=193<UP,RUNNING,NOARP> mtu 1370
inet 10.1.147.0 netmask 255.255.255.255
tunnel txqueuelen 1000 (IPIP Tunnel)
RX packets 267419938 bytes 508053226147 (473.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 213405984 bytes 353451811693 (329.1 GiB)
TX errors 0 dropped 6227797 overruns 0 carrier 0 collisions 0
The number of dropped packets keeps growing, so this can be a possible reason for the poor performances noticed in UI.
What can be the root cause for this and how to fix it ?
Document Location
Worldwide
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Document Information
Modified date:
29 July 2019
UID
ibm10960830