github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/db/stats.go (about)

     1  // Copyright 2022 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 db
    16  
    17  import (
    18  	"encoding/json"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/wal"
    21  )
    22  
    23  type Stats struct {
    24  	db *DB
    25  
    26  	// TODO: Checkpoint Stats
    27  
    28  	WalStats *WalStats
    29  }
    30  
    31  func NewStats(db *DB) *Stats {
    32  	return &Stats{
    33  		db: db,
    34  	}
    35  }
    36  
    37  func (stats *Stats) Collect() {
    38  	stats.WalStats = CollectWalStats(stats.db.Wal)
    39  }
    40  
    41  func (stats *Stats) ToString(prefix string) string {
    42  	buf, err := json.MarshalIndent(stats, prefix, "  ")
    43  	if err != nil {
    44  		panic(err)
    45  	}
    46  	return string(buf)
    47  }
    48  
    49  type WalStats struct {
    50  	MaxLSN     uint64
    51  	MaxCkped   uint64
    52  	PendingCnt uint64
    53  }
    54  
    55  func CollectWalStats(w wal.Driver) *WalStats {
    56  	return &WalStats{
    57  		MaxLSN:     w.GetCurrSeqNum(),
    58  		MaxCkped:   w.GetCheckpointed(),
    59  		PendingCnt: w.GetPenddingCnt(),
    60  	}
    61  }