Add the 16kB unit size to pg_settings parser.

Fixes #101.

.travis.yml

@@ -3,7 +3,7 @@ services:
 - docker
 language: go
 go:
-- '1.8'
+- '1.9'
 # Make sure we have p2 and the postgres client.
 before_install:
 - go get -v github.com/mattn/goveralls

pg_setting.go

@@ -94,7 +94,7 @@ func (s *pgSetting) normaliseUnit() (val float64, unit string, err error) {
 		return
 	case "ms", "s", "min", "h", "d":
 		unit = "seconds"
-	case "kB", "MB", "GB", "TB", "8kB", "16MB":
+	case "kB", "MB", "GB", "TB", "8kB", "16kB", "16MB":
 		unit = "bytes"
 	default:
 		err = fmt.Errorf("Unknown unit for runtime variable: %q", s.unit)
@@ -125,6 +125,8 @@ func (s *pgSetting) normaliseUnit() (val float64, unit string, err error) {
 		val *= math.Pow(2, 40)
 	case "8kB":
 		val *= math.Pow(2, 13)
+	case "16kB":
+		val *= math.Pow(2, 14)
 	case "16MB":
 		val *= math.Pow(2, 24)
 	}

pg_setting_test.go

@@ -60,6 +60,22 @@ var fixtures = []fixture{
 		d: "Desc{fqName: \"pg_settings_eight_kb_fixture_metric_bytes\", help: \"Foo foo foo [Units converted to bytes.]\", constLabels: {}, variableLabels: []}",
 		v: 139264,
 	},
+	{
+		p: pgSetting{
+			name:      "16_kb_real_fixture_metric",
+			setting:   "3.0",
+			unit:      "16kB",
+			shortDesc: "Foo foo foo",
+			vartype:   "real",
+		},
+		n: normalised{
+			val:  49152,
+			unit: "bytes",
+			err:  "",
+		},
+		d: "Desc{fqName: \"pg_settings_16_kb_real_fixture_metric_bytes\", help: \"Foo foo foo [Units converted to bytes.]\", constLabels: {}, variableLabels: []}",
+		v: 49152,
+	},
 	{
 		p: pgSetting{
 			name:      "16_mb_real_fixture_metric",