Balancing loads among WAD workers

As WAD workers balance load based on client source IP addresses, WAD workers for IPs with considerably more traffic than the others can see higher CPU core usage than the other WAD workers. You can fine tune the load balancing among WAD workers in the following ways:

• Disable dispatching traffic to WAD workers based on source affinity using the following command:

  config system global

  set wad-source-affinity disable

  end

• If you know which client IPs are the top traffic sources, you can explicitly exclude these IPs from proxy affinity using the set src-affinity-exempt-addr command under config web-proxy global.

  In the following example, traffic from IP 10.10.1.2 hits one single wad worker "wad 1619":

  Run Time: 0 days, 17 hours and 30 minutes

  4U, 0N, 2S, 93I, 0WA, 0HI, 1SI, 0ST; 3941T, 2001F

  wad 1619 S 25.1 1.7 0

  miglogd 1762 S 1.4 1.1 0

  forticron 1567 S 0.7 0.9 0

  hasync 1585 S < 0.7 0.9 0

  hatalk 1584 S < 0.7 0.7 0

  Run Time: 0 days, 17 hours and 30 minutes

  6U, 0N, 2S, 91I, 0WA, 0HI, 1SI, 0ST; 3941T, 2001F

  wad 1619 S 27.5 1.7 1

  hasync 1585 S < 1.0 0.9 0

  newcli 4276 R 1.0 0.6 3

  node 1937 S 0.5 2.5 2

  miglogd 1762 S 0.5 1.1 1

  Run Time: 0 days, 17 hours and 30 minutes

  6U, 0N, 1S, 92I, 0WA, 0HI, 1SI, 0ST; 3941T, 2001F

  wad 1619 R 27.8 1.7 3

  miglogd 1761 S 0.9 1.0 0

  hasync 1585 S < 0.9 0.9 1

  hatalk 1584 S < 0.9 0.7 1

  You can exclude this IP (10.10.1.2) from proxy affinity by running the following command:

  FPX31 # config web-proxy global

  FPX31 (global) # set src-affinity-exempt-addr 10.10.1.2

  FPX31 (global) # end

  After the IP is excluded from proxy affinity, traffic from 10.10.1.2 is handled by four wad workers instead of one, as shown below:

  FPX31 # dia sys top 2 10

  Run Time: 0 days, 17 hours and 31 minutes

  6U, 0N, 1S, 92I, 0WA, 0HI, 1SI, 0ST; 3941T, 2039F

  wad 1620 S 7.5 1.7 3

  wad 1621 S 7.0 1.7 1

  wad 1618 S 6.5 1.7 1

  wad 1619 S 6.5 1.7 1

  Run Time: 0 days, 17 hours and 31 minutes

  5U, 0N, 2S, 92I, 0WA, 0HI, 1SI, 0ST; 3941T, 2039F

  wad 1620 S 7.4 1.7 2

  wad 1619 S 7.4 1.7 3

  wad 1621 S 6.9 1.7 1

  wad 1618 S 6.4 1.7 3

  Run Time: 0 days, 17 hours and 31 minutes

  7U, 0N, 1S, 91I, 0WA, 0HI, 1SI, 0ST; 3941T, 2038F

  wad 1618 S 7.0 1.7 0

  wad 1619 S 7.0 1.7 3

  wad 1621 S 6.5 1.7 3

  wad 1620 S 6.0 1.7 2