Refresh rate is honoured exactly everywhere: no list floor, sampler up to 10 s, server caches reduced to coalescing only

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

internal/cron/cron.go

@@ -390,7 +390,7 @@ var cronLogRe = regexp.MustCompile(`^\((\S+)\) CMD \((.*)\)$`)
 // lastRunsFromJournal maps user+command to the most recent "(user) CMD (command)" line.
 func (m *Manager) lastRunsFromJournal(ctx context.Context) map[string]int64 {
 	m.mu.Lock()
-	if time.Since(m.lastAt) < 60*time.Second && m.lastRuns != nil {
+	if time.Since(m.lastAt) < 5*time.Second && m.lastRuns != nil {
 		r := m.lastRuns
 		m.mu.Unlock()
 		return r

internal/metrics/metrics.go

@@ -29,7 +29,7 @@ import (
 const (
 	DefaultInterval = 2 * time.Second
 	MinInterval     = 100 * time.Millisecond
-	MaxInterval     = 2 * time.Second
+	MaxInterval     = 10 * time.Second
 	History         = 300              // samples kept; the window is History × interval (30 s at 100 ms, 10 min at 2 s)
 	fsEvery         = 30 * time.Second // filesystem usage changes slowly and statfs on network mounts isn't free
 	upsEvery        = 10 * time.Second // UPS daemons are an exec each; don't hammer them at fast intervals
@@ -982,7 +982,7 @@ func (c *Collector) Processes() ProcTable {
 		c.prevProc = map[int]procTimes{}
 		c.procInfo = map[int]procStatic{}
 	}
-	if now.Sub(c.procAt) < 500*time.Millisecond && c.lastTable != nil { // coalesce bursts of clients
+	if now.Sub(c.procAt) < 100*time.Millisecond && c.lastTable != nil { // coalesce simultaneous clients only
 		return *c.lastTable
 	}
 	ents, err := os.ReadDir("/proc")

internal/services/services.go

@@ -107,7 +107,7 @@ func run(ctx context.Context, args ...string) (string, error) {
 // Cached for a few seconds because the UI polls it.
 func (m *Manager) List(ctx context.Context) ([]Unit, error) {
 	m.mu.Lock()
-	if time.Since(m.cacheAt) < 4*time.Second && m.cache != nil {
+	if time.Since(m.cacheAt) < 200*time.Millisecond && m.cache != nil { // coalesce simultaneous clients only
 		c := m.cache
 		m.mu.Unlock()
 		return c, nil