From 41fe707bec5555f5e441d7a291d6726b9ce46834 Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@gmail.com>
Date: Wed, 17 Mar 2021 00:46:22 +0200
Subject: [PATCH] lib/storage: limit loops count in order to reduce max CPU
 usage during filter search

---
 lib/storage/index_db.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index 5866c25d5..c7c5e3c71 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -2979,6 +2979,9 @@ func (is *indexSearch) getMetricIDsForDateAndFilters(date uint64, tfs *TagFilter
 			break
 		}
 		maxLoopsCount := getFirstPositiveFilterLoopsCount(tfws[i+1:])
+		if maxLoopsCount == int64Max {
+			maxLoopsCount = int64(metricIDsLen) * loopsCountPerMetricNameMatch
+		}
 		m, filterLoopsCount, err := is.getMetricIDsForDateTagFilter(tf, date, tfs.commonPrefix, intMax, maxLoopsCount)
 		if err != nil {
 			if errors.Is(err, errTooManyLoops) {