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variables.go
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variables.go
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// Copyright 2021 TiKV Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// NOTE: The code in this file is based on code from the
// TiDB project, licensed under the Apache License v 2.0
//
// https://github.com/pingcap/tidb/tree/cc5e161ac06827589c4966674597c137cc9e809c/store/tikv/kv/variables.go
//
// Copyright 2021 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kv
// Variables defines the variables used by KV storage.
type Variables struct {
// BackoffLockFast specifies the LockFast backoff base duration in milliseconds.
BackoffLockFast int
// BackOffWeight specifies the weight of the max back off time duration.
BackOffWeight int
// Pointer to SessionVars.Killed
// Killed is a flag to indicate that this query is killed.
Killed *uint32
}
// NewVariables create a new Variables instance with default values.
func NewVariables(killed *uint32) *Variables {
return &Variables{
BackoffLockFast: DefBackoffLockFast,
BackOffWeight: DefBackOffWeight,
Killed: killed,
}
}
var ignoreKill uint32
// DefaultVars is the default variables instance.
var DefaultVars = NewVariables(&ignoreKill)
// Default values
const (
DefBackoffLockFast = 10
DefBackOffWeight = 2
)