// but still, no need to interpret more
		return 0
	}
	if limit >= 100*humanize.TiByte {
		// No limit set, or unreasonably high. Ignore
		return 0
	}
	return limit
}

func availableMemory() (available uint64) {
	available = 2048 * blockSizeV2 * 2 // Default to 4 GiB when we can't find the limits.

	if runtime.GOOS == "linux" {
		// Honor cgroup limits if set.
		limit := cgroupMemLimit()

		ctxt.CertsDir = ctx.String("certs-dir")
		ctxt.certsDirSet = true
	case ctx.GlobalIsSet("certs-dir"):
		ctxt.CertsDir = ctx.GlobalString("certs-dir")
		ctxt.certsDirSet = true
	}

	memAvailable := availableMemory()
	if ctx.IsSet("memlimit") || ctx.GlobalIsSet("memlimit") {
		memlimit := ctx.String("memlimit")
		if memlimit == "" {
			memlimit = ctx.GlobalString("memlimit")
		}