expose a config to adjust the StdBy pool size (if required)

[venkatsridhar95]

By default, the fallback pool size is equal to the primary pool size.

[rasamala83]

LGTM

[shtiencode]

Would the minimal value better to be higher than 1? single-worker pool might potentially cause saturation features to be triggered too easily (not meaningfully helpful).

[venkatsridhar95]

@shtiencode A minimum value of 1 will be triggered only when taf_children_pct is below 0 or when the taf_children_pct of the existing worker pool size is too low.

[shtiencode]

@shtiencode A minimum value of 1 will be triggered only when taf_children_pct is below 0 or when the taf_children_pct of the existing worker pool size is too low.

@venkatsridhar95 Yes, you could also reach 1 and it would be less meaningful. Arguably though, I can see existing readonly pct also applied same logic (with different purpose though). It looks ok to me but suggest higher default value may prevent abusive configuration.
num = num * gAppConfig.TafChildrenPct / 100
if num == 0 {
num = 1

[shtiencode]

Looks good, I left a suggestion in comment for prevention of abusive setting that we can review later as issue.