github.com/matrixorigin/matrixone@v1.2.0/pkg/pb/statsinfo/statsinfo.go (about)

     1  // Copyright 2021 - 2024 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package statsinfo
    16  
    17  import "math"
    18  
    19  func (sc *StatsInfo) NeedUpdate(currentApproxObjNum int64) bool {
    20  	if sc.ApproxObjectNumber == 0 || sc.AccurateObjectNumber == 0 {
    21  		return true
    22  	}
    23  	if math.Abs(float64(sc.ApproxObjectNumber-currentApproxObjNum)) >= 10 {
    24  		return true
    25  	}
    26  	if float64(currentApproxObjNum)/float64(sc.ApproxObjectNumber) > 1.05 || float64(currentApproxObjNum)/float64(sc.ApproxObjectNumber) < 0.95 {
    27  		return true
    28  	}
    29  	return false
    30  }