Database statistics in Settings > Data

New GET /api/dbstats reads VictoriaLogs /metrics (stored lines, size on
disk, raw size, free space, partitions, retention) and two LogsQL queries
(period covered, distinct hosts and apps, lines of the last 24 h and hour),
cached for 30 s. The danger zone shows them, sizes in KB/MB/GB or Ko/Mo/Go.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

api.go

@@ -23,6 +23,7 @@ type API struct {
 	docker     *DockerManager // nil when DOCKER_LOGS is off
 	syslog     *SyslogServer
 	host       *HostLogs
+	dbstats    dbStatsCache
 }
 
 func (a *API) Routes(mux *http.ServeMux) {
@@ -32,6 +33,7 @@ func (a *API) Routes(mux *http.ServeMux) {
 	mux.HandleFunc("GET /api/facets", a.facets)
 	mux.HandleFunc("GET /api/stream", a.stream)
 	mux.HandleFunc("GET /api/stats", a.stats)
+	mux.HandleFunc("GET /api/dbstats", a.dbStats)
 	mux.HandleFunc("GET /api/tags", a.listTags)
 	mux.HandleFunc("POST /api/tags", a.createTag)
 	mux.HandleFunc("POST /api/tags/reset", a.resetTags)
@@ -314,6 +316,17 @@ func (a *API) stats(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, s)
 }
 
+// GET /api/dbstats[?refresh=1]: size and content of the VictoriaLogs base
+// (Settings > Data), cached for 30 s.
+func (a *API) dbStats(w http.ResponseWriter, r *http.Request) {
+	st, err := a.dbstats.get(r.Context(), a.store, r.URL.Query().Get("refresh") == "1")
+	if err != nil {
+		writeErr(w, http.StatusBadGateway, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, st)
+}
+
 func (a *API) listTags(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, a.tags.List())
 }