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Add queue high water marks to handler statistics

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- Track the maximum queue length seen for each handler
- Display high water marks on the status page with percentage
- Helps identify which handlers are experiencing queue pressure
This commit is contained in:
Jeffrey Paul
2025-07-29 02:46:53 +02:00
parent 2cfca78464
commit 23127b86e9
4 changed files with 109400 additions and 267764 deletions
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34
internal/server/handlers.go
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@@ -174,14 +174,15 @@ func (s *Server) handleStatusJSON() http.HandlerFunc {
func (s *Server) handleStats() http.HandlerFunc {
// HandlerStatsInfo represents handler statistics in the API response
type HandlerStatsInfo struct {
Name string `json:"name"`
QueueLength int `json:"queue_length"`
QueueCapacity int `json:"queue_capacity"`
ProcessedCount uint64 `json:"processed_count"`
DroppedCount uint64 `json:"dropped_count"`
AvgProcessTimeMs float64 `json:"avg_process_time_ms"`
MinProcessTimeMs float64 `json:"min_process_time_ms"`
MaxProcessTimeMs float64 `json:"max_process_time_ms"`
Name string `json:"name"`
QueueLength int `json:"queue_length"`
QueueCapacity int `json:"queue_capacity"`
QueueHighWaterMark int `json:"queue_high_water_mark"`
ProcessedCount uint64 `json:"processed_count"`
DroppedCount uint64 `json:"dropped_count"`
AvgProcessTimeMs float64 `json:"avg_process_time_ms"`
MinProcessTimeMs float64 `json:"min_process_time_ms"`
MaxProcessTimeMs float64 `json:"max_process_time_ms"`
}
// StatsResponse represents the API statistics response
@@ -281,14 +282,15 @@ func (s *Server) handleStats() http.HandlerFunc {
const microsecondsPerMillisecond = 1000.0
for _, hs := range handlerStats {
handlerStatsInfo = append(handlerStatsInfo, HandlerStatsInfo{
Name: hs.Name,
QueueLength: hs.QueueLength,
QueueCapacity: hs.QueueCapacity,
ProcessedCount: hs.ProcessedCount,
DroppedCount: hs.DroppedCount,
AvgProcessTimeMs: float64(hs.AvgProcessTime.Microseconds()) / microsecondsPerMillisecond,
MinProcessTimeMs: float64(hs.MinProcessTime.Microseconds()) / microsecondsPerMillisecond,
MaxProcessTimeMs: float64(hs.MaxProcessTime.Microseconds()) / microsecondsPerMillisecond,
Name: hs.Name,
QueueLength: hs.QueueLength,
QueueCapacity: hs.QueueCapacity,
QueueHighWaterMark: hs.QueueHighWaterMark,
ProcessedCount: hs.ProcessedCount,
DroppedCount: hs.DroppedCount,
AvgProcessTimeMs: float64(hs.AvgProcessTime.Microseconds()) / microsecondsPerMillisecond,
MinProcessTimeMs: float64(hs.MinProcessTime.Microseconds()) / microsecondsPerMillisecond,
MaxProcessTimeMs: float64(hs.MaxProcessTime.Microseconds()) / microsecondsPerMillisecond,
})
}