Kiu/VictoriaMetrics
Kiu/VictoriaMetrics
1
0
Fork 0
mirror of https://github.com/VictoriaMetrics/VictoriaMetrics.git synced 2024-12-15 00:13:30 +01:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

lib/storage: skip repeated useless work when intersection of metricIDs with the given filter is too expensive

Browse Source 
This should improve performance for query filters over big number of time series.
This commit is contained in:
Aliaksandr Valialkin 2019-11-05 14:17:59 +02:00
parent f48e97263c
commit f93c4f2493
1 changed files with 30 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
lib/storage/index_db.go
View File

@ -1591,7 +1591,7 @@ func (is *indexSearch) updateMetricIDsForTagFilters(metricIDs *uint64set.Set, tf
if tf == minTf {
continue
}
mIDs, err := is.intersectMetricIDsWithTagFilter(tf, minMetricIDs)
mIDs, err := is.intersectMetricIDsWithTagFilter(tf, minMetricIDs, tfs.accountID, tfs.projectID)
if err == errFallbackToMetricNameMatch {
// The tag filter requires too many index scans. Postpone it,
// so tag filters with lower number of index scans may be applied.
@ -1608,7 +1608,7 @@ func (is *indexSearch) updateMetricIDsForTagFilters(metricIDs *uint64set.Set, tf
return is.updateMetricIDsByMetricNameMatch(metricIDs, minMetricIDs, tfsPostponed, tfs.accountID, tfs.projectID)
}
for i, tf := range tfsPostponed {
mIDs, err := is.intersectMetricIDsWithTagFilter(tf, minMetricIDs)
mIDs, err := is.intersectMetricIDsWithTagFilter(tf, minMetricIDs, tfs.accountID, tfs.projectID)
if err == errFallbackToMetricNameMatch {
return is.updateMetricIDsByMetricNameMatch(metricIDs, minMetricIDs, tfsPostponed[i:], tfs.accountID, tfs.projectID)
}
@ -1625,6 +1625,7 @@ const (
uselessSingleTagFilterKeyPrefix = 0
uselessMultiTagFiltersKeyPrefix = 1
uselessNegativeTagFilterKeyPrefix = 2
uselessTagIntersectKeyPrefix = 3
)
var uselessTagFilterCacheValue = []byte("1")
@ -2093,10 +2094,36 @@ func (is *indexSearch) updateMetricIDsAll(metricIDs *uint64set.Set, accountID, p
// over the found metrics.
const maxIndexScanLoopsPerMetric = 100
func (is *indexSearch) intersectMetricIDsWithTagFilter(tf *tagFilter, filter *uint64set.Set) (*uint64set.Set, error) {
func (is *indexSearch) intersectMetricIDsWithTagFilter(tf *tagFilter, filter *uint64set.Set, accountID, projectID uint32) (*uint64set.Set, error) {
if filter.Len() == 0 {
return nil, nil
}
kb := &is.kb
filterLenRounded := (uint64(filter.Len()) / 1024) * 1024
kb.B = append(kb.B[:0], uselessTagIntersectKeyPrefix)
kb.B = encoding.MarshalUint64(kb.B, filterLenRounded)
kb.B = tf.Marshal(kb.B, accountID, projectID)
if len(is.db.uselessTagFiltersCache.Get(nil, kb.B)) > 0 {
// Skip useless work, since the intersection will return
// errFallbackToMetricNameMatc for the given filter.
return nil, errFallbackToMetricNameMatch
}
metricIDs, err := is.intersectMetricIDsWithTagFilterNocache(tf, filter)
if err == nil {
return metricIDs, err
}
if err != errFallbackToMetricNameMatch {
return nil, err
}
kb.B = append(kb.B[:0], uselessTagIntersectKeyPrefix)
kb.B = encoding.MarshalUint64(kb.B, filterLenRounded)
kb.B = tf.Marshal(kb.B, accountID, projectID)
is.db.uselessTagFiltersCache.Set(kb.B, uselessTagFilterCacheValue)
return nil, errFallbackToMetricNameMatch
}
func (is *indexSearch) intersectMetricIDsWithTagFilterNocache(tf *tagFilter, filter *uint64set.Set) (*uint64set.Set, error) {
metricIDs := filter
if !tf.isNegative {
metricIDs = &uint64set.Set{}