status memory info

main.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"math"
 	"math/rand"
 	"net/http"
 	"os"
@@ -1182,6 +1183,14 @@ func runStatus() error {
 		printInfo("PID", pid, remoteLineColor)
 	}
 
+	if memCurrent, ok := parseSystemdBytes(props["MemoryCurrent"]); ok {
+		memLine := formatBytes(memCurrent)
+		if memPeak, ok := parseSystemdBytes(props["MemoryPeak"]); ok {
+			memLine = fmt.Sprintf("%s (peak: %s)", memLine, formatBytes(memPeak))
+		}
+		printInfo("Memory", memLine, remoteLineColor)
+	}
+
 	if started := strings.TrimSpace(props["ActiveEnterTimestamp"]); started != "" {
 		printInfo("Active since", started, localTimeColor)
 	}
@@ -1216,7 +1225,7 @@ func statusColorFor(state string) string {
 // querySystemdProperties asks systemd for a few service properties.
 func querySystemdProperties(ctx *deploymentContext) (map[string]string, error) {
 	script := fmt.Sprintf(`set -euo pipefail
-systemctl show pb@%s -p ActiveState -p SubState -p ActiveEnterTimestamp -p ActiveEnterTimestampMonotonic -p ExecMainPID
+systemctl show pb@%s -p ActiveState -p SubState -p ActiveEnterTimestamp -p ActiveEnterTimestampMonotonic -p ExecMainPID -p MemoryCurrent -p MemoryPeak
 `, ctx.serviceName)
 	output, err := runSSHCollect(ctx.serverIP, script)
 	if err != nil {
@@ -1225,6 +1234,23 @@ systemctl show pb@%s -p ActiveState -p SubState -p ActiveEnterTimestamp -p Activ
 	return parseKeyValueLines(output), nil
 }
 
+func parseSystemdBytes(value string) (int64, bool) {
+	value = strings.TrimSpace(value)
+	if value == "" || value == "0" {
+		return 0, false
+	}
+	if parsed, err := strconv.ParseInt(value, 10, 64); err == nil && parsed > 0 {
+		return parsed, true
+	}
+	if parsed, err := strconv.ParseUint(value, 10, 64); err == nil && parsed > 0 {
+		if parsed > math.MaxInt64 {
+			return 0, false
+		}
+		return int64(parsed), true
+	}
+	return 0, false
+}
+
 func computeUptime(server, startMicro string) time.Duration {
 	startMicro = strings.TrimSpace(startMicro)
 	if startMicro == "" {