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Added a new metric to the workflow cache (uber#6064)
* Added a new metric to the workflow cache This is to track the max number of requests to a single workflow per domain * Updated based on review - Change from gauge to timer - Only track for workflow IDs the timer will do the bookkeeping for max value * Moved the method to workflowIDCountMetric as it modifies this only
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| // The MIT License (MIT) | ||
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| // Copyright (c) 2017-2020 Uber Technologies Inc. | ||
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| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
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| package workflowcache | ||
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| import ( | ||
| "sync" | ||
| "time" | ||
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| "github.com/uber/cadence/common/clock" | ||
| "github.com/uber/cadence/common/metrics" | ||
| ) | ||
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| // workflowIDCountMetric holds the count of requests for a given second, for a domain/workflowID pair | ||
| // This is used to emit the max count of requests for a given domain | ||
| // Ideally we would just emit the count of requests for a given domain/workflowID pair, but this is not | ||
| // possible, due to the high cardinality of workflowIDs | ||
| type workflowIDCountMetric struct { | ||
| sync.Mutex | ||
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| startingSecond time.Time | ||
| count int | ||
| } | ||
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| func (cm *workflowIDCountMetric) reset(now time.Time) { | ||
| cm.startingSecond = now | ||
| cm.count = 0 | ||
| } | ||
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| func (cm *workflowIDCountMetric) updatePerDomainMaxWFRequestCount( | ||
| domainName string, | ||
| timeSource clock.TimeSource, | ||
| metricsClient metrics.Client, | ||
| ) { | ||
| cm.Lock() | ||
| defer cm.Unlock() | ||
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| if timeSource.Since(cm.startingSecond) > time.Second { | ||
| cm.reset(timeSource.Now().UTC()) | ||
| } | ||
| cm.count++ | ||
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| // We can just use the upper of the metric, so it is not an issue to emit all the counts | ||
| metricsClient.Scope(metrics.HistoryClientWfIDCacheScope, metrics.DomainTag(domainName)). | ||
| RecordTimer(metrics.WorkflowIDCacheRequestsExternalMaxRequestsPerSecondsTimer, time.Duration(cm.count)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // The MIT License (MIT) | ||
|
|
||
| // Copyright (c) 2017-2020 Uber Technologies Inc. | ||
|
|
||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
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| package workflowcache | ||
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| import ( | ||
| "testing" | ||
| "time" | ||
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| "github.com/stretchr/testify/assert" | ||
| "github.com/uber-go/tally" | ||
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| "github.com/uber/cadence/common/clock" | ||
| "github.com/uber/cadence/common/metrics" | ||
| ) | ||
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| func TestUpdatePerDomainMaxWFRequestCount(t *testing.T) { | ||
| domainName := "some domain name" | ||
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| cases := []struct { | ||
| name string | ||
| updatePerDomainMaxWFRequestCount func(metricsClient metrics.Client, source clock.MockedTimeSource) | ||
| expecetMetrics []time.Duration | ||
| }{ | ||
| { | ||
| name: "Single workflowID", | ||
| updatePerDomainMaxWFRequestCount: func(metricsClient metrics.Client, timeSource clock.MockedTimeSource) { | ||
| workflowID1 := &workflowIDCountMetric{} | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 1 | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 2 | ||
| }, | ||
| expecetMetrics: []time.Duration{1, 2}, | ||
| }, | ||
| { | ||
| name: "Separate workflowIDs", | ||
| updatePerDomainMaxWFRequestCount: func(metricsClient metrics.Client, timeSource clock.MockedTimeSource) { | ||
| workflowID1 := &workflowIDCountMetric{} | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 1 | ||
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| workflowID2 := &workflowIDCountMetric{} | ||
| workflowID2.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 1 | ||
| workflowID2.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 2 | ||
| workflowID2.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 3 | ||
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| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 2 | ||
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| }, | ||
| expecetMetrics: []time.Duration{1, 1, 2, 3, 2}, | ||
| }, | ||
| { | ||
| name: "Reset", | ||
| updatePerDomainMaxWFRequestCount: func(metricsClient metrics.Client, timeSource clock.MockedTimeSource) { | ||
| workflowID1 := &workflowIDCountMetric{} | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 1 | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 2 | ||
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| timeSource.Advance(1100 * time.Millisecond) | ||
| workflowID1.updatePerDomainMaxWFRequestCount(domainName, timeSource, metricsClient) // Emits 1 | ||
| }, | ||
| expecetMetrics: []time.Duration{1, 2, 1}, | ||
| }, | ||
| } | ||
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| for _, tc := range cases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| testScope := tally.NewTestScope("", make(map[string]string)) | ||
| timeSource := clock.NewMockedTimeSourceAt(time.Unix(123, 456)) | ||
| metricsClient := metrics.NewClient(testScope, metrics.History) | ||
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| tc.updatePerDomainMaxWFRequestCount(metricsClient, timeSource) | ||
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| // We expect the domain tag to be set to "all" and "some domain name", we don't know the order, so use a set | ||
| expectedDomainTags := map[string]struct{}{"all": {}, "some domain name": {}} | ||
| actualDomainTags := map[string]struct{}{} | ||
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| timers := testScope.Snapshot().Timers() | ||
| assert.Equal(t, 2, len(timers)) | ||
| for _, v := range timers { | ||
| actualDomainTags[v.Tags()["domain"]] = struct{}{} | ||
| assert.Equal(t, tc.expecetMetrics, v.Values()) | ||
| } | ||
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| assert.Equal(t, expectedDomainTags, actualDomainTags) | ||
| }) | ||
| } | ||
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| } |