31 lines
1.3 KiB
Go
31 lines
1.3 KiB
Go
// Copyright 2025 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package workloadbasedlearning
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// ReadTableCostMetrics is used to indicate the intermediate status and results analyzed through read workload
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// for function "HandleReadTableCost".
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type ReadTableCostMetrics struct {
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tableName string
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// tableScanTime[t] = sum(scan-time * readFrequency) of all records in statement_summary where table-name = t
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tableScanTime float64
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// tableMemUsage[t] = sum(mem-usage * readFrequency) of all records in statement_summary where table-name = t
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tableMemUsage float64
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// readFrequency[t] = sum(read-frequency) of all records in statement_summary where table-name = t
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readFrequency int64
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// tableCost[t] = tableScanTime[t] / totalScanTime + tableMemUsage[t] / totalMemUsage
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// range between 0 ~ 2
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tableCost float64
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}
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