add per-collector tick timing logs (debug, >5ms threshold)

server/services/collector.js

@@ -442,6 +442,7 @@ export class MetricsCollector extends EventEmitter {
   }
 
   _tick() {
+    const t0 = performance.now()
     try {
       const ts = Date.now()
       const dtSec = this.lastTs ? (ts - this.lastTs) / 1000 : this.intervalMs / 1000
@@ -507,14 +508,19 @@ export class MetricsCollector extends EventEmitter {
     } catch (err) {
       log.error('Collector tick failed', { error: err.message })
     }
+    const dur = performance.now() - t0
+    if (dur > 15) log.debug('tick', { collector: 'main', durMs: Math.round(dur * 10) / 10 })
   }
 
   _safeCollect(name, fn) {
+    const t0 = performance.now()
     try {
       fn()
     } catch (err) {
       log.warn(`Collector ${name} failed`, { error: err.message })
     }
+    const dur = performance.now() - t0
+    if (dur > 5) log.debug(`collect:${name}`, { durMs: Math.round(dur * 10) / 10 })
   }
 
   _collectCpuFallback(batch, ts, dtSec) {

server/services/collectors/cgroups.js

@@ -244,6 +244,7 @@ export class CgroupsCollector extends EventEmitter {
   }
 
   async _tick() {
+    const t0 = performance.now()
     try {
       await this._refreshNames()
     } catch {
@@ -383,6 +384,8 @@ export class CgroupsCollector extends EventEmitter {
     }
 
     if (batch.length) this.emit('samples', batch)
+    const dur = performance.now() - t0
+    if (dur > 10) log.debug('tick', { collector: 'cgroups', durMs: Math.round(dur * 10) / 10 })
   }
 }
 

server/services/collectors/fs-stats.js

@@ -142,6 +142,7 @@ export class FsStatsCollector extends CollectorPlugin {
   }
 
   async collect() {
+    const t0 = performance.now()
     const rows = collectFsStatsData()
     if (!rows.length) return []
     const ts = Date.now()
@@ -157,6 +158,8 @@ export class FsStatsCollector extends CollectorPlugin {
         values: { write_kb: row.write_kb, read_kb: row.read_kb },
       })
     }
+    const dur = performance.now() - t0
+    if (dur > 5) log.debug('tick', { collector: 'fs-stats', durMs: Math.round(dur * 10) / 10 })
     return batch
   }
 }

server/services/collectors/processes.js

@@ -240,6 +240,7 @@ export class ProcessCollector extends EventEmitter {
   }
 
   _tick() {
+    const t0 = performance.now()
     try {
       const procs = listProcStats()
       if (!procs) return
@@ -381,6 +382,8 @@ export class ProcessCollector extends EventEmitter {
     } catch (err) {
       log.warn('Process tick failed', { error: err.message })
     }
+    const dur = performance.now() - t0
+    if (dur > 10) log.debug('tick', { collector: 'processes', durMs: Math.round(dur * 10) / 10 })
   }
 }
 

server/services/collectors/sensors.js

@@ -230,6 +230,7 @@ export class SensorsCollector extends EventEmitter {
   }
 
   _tick() {
+    const t0 = performance.now()
     const ts = Date.now()
     const samples = sampleSensors()
     if (!samples.length) return
@@ -240,6 +241,8 @@ export class SensorsCollector extends EventEmitter {
       values: s.values,
     }))
     this.emit('samples', batch)
+    const dur = performance.now() - t0
+    if (dur > 5) log.debug('tick', { collector: 'sensors', durMs: Math.round(dur * 10) / 10 })
   }
 }
 

server/services/collectors/sockets.js

@@ -122,6 +122,7 @@ export class SocketsCollector extends EventEmitter {
   }
 
   _tick() {
+    const t0 = performance.now()
     const ts = Date.now()
     const v4 = countTcp('/proc/net/tcp')
     const v6 = countTcp('/proc/net/tcp6')
@@ -140,6 +141,8 @@ export class SocketsCollector extends EventEmitter {
         },
       },
     ])
+    const dur = performance.now() - t0
+    if (dur > 5) log.debug('tick', { collector: 'sockets', durMs: Math.round(dur * 10) / 10 })
   }
 }