From 6c4217276f4ae3a3124d63ff5ee0486bf252a6c0 Mon Sep 17 00:00:00 2001
From: Fabian Reinartz <fab.reinartz@gmail.com>
Date: Tue, 28 Feb 2017 15:08:52 +0100
Subject: [PATCH] Periodically trigger compaction

This addresses an issue where the compaction triggered on cutting
a new block doesn't find anything as the writers are still active on the
block that should be ready for compaction.
---
 db.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/db.go b/db.go
index 001509d5d..fb7dedacf 100644
--- a/db.go
+++ b/db.go
@@ -187,8 +187,16 @@ func Open(dir string, l log.Logger, r prometheus.Registerer, opts *Options) (db
 func (db *DB) run() {
 	defer close(db.donec)
 
+	tick := time.NewTicker(30 * time.Second)
+	defer tick.Stop()
+
 	for {
 		select {
+		case <-tick.C:
+			select {
+			case db.compactc <- struct{}{}:
+			default:
+			}
 		case <-db.compactc:
 			db.metrics.compactionsTriggered.Inc()