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tsdb: Expose total number of label pairs in head in TSDB stats page (#8343) 

* tsdb: Expose total number of label pairs in head

Signed-off-by: Nguyen Le Vu Long <vulongvn98@gmail.com>

* fix: add comment for NumLabelPairs

Signed-off-by: Nguyen Le Vu Long <vulongvn98@gmail.com>

* fix: remove comment

Signed-off-by: Nguyen Le Vu Long <vulongvn98@gmail.com>
This commit is contained in:
Nguyen Le Vu Long 2021-01-07 13:41:32 +07:00 committed by GitHub
parent 0954026b9a
commit cd1dafc2fd
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 19 additions and 10 deletions
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4
tsdb/index/postings.go
View File

@ -115,6 +115,7 @@ type PostingsStats struct {
CardinalityLabelStats []Stat
LabelValueStats []Stat
LabelValuePairsStats []Stat
NumLabelPairs int
}
// Stats calculates the cardinality statistics from postings.
@ -128,6 +129,7 @@ func (p *MemPostings) Stats(label string) *PostingsStats {
labels := &maxHeap{}
labelValueLength := &maxHeap{}
labelValuePairs := &maxHeap{}
numLabelPairs := 0
metrics.init(maxNumOfRecords)
labels.init(maxNumOfRecords)
@ -139,6 +141,7 @@ func (p *MemPostings) Stats(label string) *PostingsStats {
continue
}
labels.push(Stat{Name: n, Count: uint64(len(e))})
numLabelPairs += len(e)
size = 0
for name, values := range e {
if n == label {
@ -157,6 +160,7 @@ func (p *MemPostings) Stats(label string) *PostingsStats {
CardinalityLabelStats: labels.get(),
LabelValueStats: labelValueLength.get(),
LabelValuePairsStats: labelValuePairs.get(),
NumLabelPairs: numLabelPairs,
}
}

18
web/api/v1/api.go
View File

@ -1236,10 +1236,11 @@ type stat struct {
// HeadStats has information about the TSDB head.
type HeadStats struct {
NumSeries uint64 `json:"numSeries"`
ChunkCount int64 `json:"chunkCount"`
MinTime int64 `json:"minTime"`
MaxTime int64 `json:"maxTime"`
NumSeries uint64 `json:"numSeries"`
NumLabelPairs int `json:"numLabelPairs"`
ChunkCount int64 `json:"chunkCount"`
MinTime int64 `json:"minTime"`
MaxTime int64 `json:"maxTime"`
}
// tsdbStatus has information of cardinality statistics from postings.
@ -1281,10 +1282,11 @@ func (api *API) serveTSDBStatus(*http.Request) apiFuncResult {
}
return apiFuncResult{tsdbStatus{
HeadStats: HeadStats{
NumSeries: s.NumSeries,
ChunkCount: chunkCount,
MinTime: s.MinTime,
MaxTime: s.MaxTime,
NumSeries: s.NumSeries,
ChunkCount: chunkCount,
MinTime: s.MinTime,
MaxTime: s.MaxTime,
NumLabelPairs: s.IndexPostingStats.NumLabelPairs,
},
SeriesCountByMetricName: convertStats(s.IndexPostingStats.CardinalityMetricsStats),
LabelValueCountByLabelName: convertStats(s.IndexPostingStats.CardinalityLabelStats),

3
web/ui/react-app/src/pages/tsdbStatus/TSDBStatus.test.tsx
View File

@ -15,6 +15,7 @@ const fakeTSDBStatusResponse: {
data: {
headStats: {
numSeries: 508,
numLabelPairs: 1234,
chunkCount: 937,
minTime: 1591516800000,
maxTime: 1598896800143,
@ -85,7 +86,7 @@ describe('TSDB Stats', () => {
.at(0)
.find('tbody')
.find('td');
['508', '937', '2020-06-07T08:00:00.000Z (1591516800000)', '2020-08-31T18:00:00.143Z (1598896800143)'].forEach(
['508', '937', '1234', '2020-06-07T08:00:00.000Z (1591516800000)', '2020-08-31T18:00:00.143Z (1598896800143)'].forEach(
(value, i) => {
expect(headStats.at(i).text()).toEqual(value);
}

4
web/ui/react-app/src/pages/tsdbStatus/TSDBStatus.tsx
View File

@ -14,6 +14,7 @@ interface Stats {
interface HeadStats {
numSeries: number;
numLabelPairs: number;
chunkCount: number;
minTime: number;
maxTime: number;
@ -35,10 +36,11 @@ export const TSDBStatusContent: FC<TSDBMap> = ({
seriesCountByLabelValuePair,
}) => {
const unixToTime = (unix: number): string => new Date(unix).toISOString();
const { chunkCount, numSeries, minTime, maxTime } = headStats;
const { chunkCount, numSeries, numLabelPairs, minTime, maxTime } = headStats;
const stats = [
{ header: 'Number of Series', value: numSeries },
{ header: 'Number of Chunks', value: chunkCount },
{ header: 'Number of Label Pairs', value: numLabelPairs },
{ header: 'Current Min Time', value: `${unixToTime(minTime)} (${minTime})` },
{ header: 'Current Max Time', value: `${unixToTime(maxTime)} (${maxTime})` },
];