github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/base/constants.go

// Copyright 2016 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.

package base

import "time"

const (
	// DefaultMaxClockOffset is the default maximum acceptable clock offset value.
	// On Azure, clock offsets between 250ms and 500ms are common. On AWS and GCE,
	// clock offsets generally stay below 250ms. See comments on Config.MaxOffset
	// for more on this setting.
	DefaultMaxClockOffset = 500 * time.Millisecond

	// DefaultTxnHeartbeatInterval is how often heartbeats are sent from the
	// transaction coordinator to a live transaction. These keep it from
	// being preempted by other transactions writing the same keys. If a
	// transaction fails to be heartbeat within 5x the heartbeat interval,
	// it may be aborted by conflicting txns.
	DefaultTxnHeartbeatInterval = 1 * time.Second

	// SlowRequestThreshold is the amount of time to wait before considering a
	// request to be "slow".
	SlowRequestThreshold = 60 * time.Second

	// ChunkRaftCommandThresholdBytes is the threshold in bytes at which
	// to chunk or otherwise limit commands being sent to Raft.
	ChunkRaftCommandThresholdBytes = 256 * 1000

	// HeapProfileDir is the directory name where the heap profiler stores profiles
	// when there is a potential OOM situation.
	HeapProfileDir = "heap_profiler"

	// GoroutineDumpDir is the directory name where the goroutine dumper
	// stores dump when one of the dump heuristics is triggered.
	GoroutineDumpDir = "goroutine_dump"

	// MinRangeMaxBytes is the minimum value for range max bytes.
	MinRangeMaxBytes = 64 << 10 // 64 KB
)