forked from pingcap/tidb
/
slow_log.go
423 lines (407 loc) · 15.7 KB
/
slow_log.go
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// Copyright 2019 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package infoschema
import (
"bufio"
"io"
"os"
"strconv"
"strings"
"time"
"github.com/pingcap/errors"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/util/execdetails"
"github.com/pingcap/tidb/util/hack"
"github.com/pingcap/tidb/util/logutil"
"github.com/pingcap/tidb/util/plancodec"
"go.uber.org/zap"
)
var slowQueryCols = []columnInfo{
{variable.SlowLogTimeStr, mysql.TypeTimestamp, 26, 0, nil, nil},
{variable.SlowLogTxnStartTSStr, mysql.TypeLonglong, 20, mysql.UnsignedFlag, nil, nil},
{variable.SlowLogUserStr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogHostStr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogConnIDStr, mysql.TypeLonglong, 20, mysql.UnsignedFlag, nil, nil},
{variable.SlowLogQueryTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogParseTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCompileTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.PreWriteTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.CommitTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.GetCommitTSTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.CommitBackoffTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.BackoffTypesStr, mysql.TypeVarchar, 64, 0, nil, nil},
{execdetails.ResolveLockTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.LocalLatchWaitTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.WriteKeysStr, mysql.TypeLonglong, 22, 0, nil, nil},
{execdetails.WriteSizeStr, mysql.TypeLonglong, 22, 0, nil, nil},
{execdetails.PrewriteRegionStr, mysql.TypeLonglong, 22, 0, nil, nil},
{execdetails.TxnRetryStr, mysql.TypeLonglong, 22, 0, nil, nil},
{execdetails.ProcessTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.WaitTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.BackoffTimeStr, mysql.TypeDouble, 22, 0, nil, nil},
{execdetails.RequestCountStr, mysql.TypeLonglong, 20, mysql.UnsignedFlag, nil, nil},
{execdetails.TotalKeysStr, mysql.TypeLonglong, 20, mysql.UnsignedFlag, nil, nil},
{execdetails.ProcessKeysStr, mysql.TypeLonglong, 20, mysql.UnsignedFlag, nil, nil},
{variable.SlowLogDBStr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogIndexNamesStr, mysql.TypeVarchar, 100, 0, nil, nil},
{variable.SlowLogIsInternalStr, mysql.TypeTiny, 1, 0, nil, nil},
{variable.SlowLogDigestStr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogStatsInfoStr, mysql.TypeVarchar, 512, 0, nil, nil},
{variable.SlowLogCopProcAvg, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopProcP90, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopProcMax, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopProcAddr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogCopWaitAvg, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopWaitP90, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopWaitMax, mysql.TypeDouble, 22, 0, nil, nil},
{variable.SlowLogCopWaitAddr, mysql.TypeVarchar, 64, 0, nil, nil},
{variable.SlowLogMemMax, mysql.TypeLonglong, 20, 0, nil, nil},
{variable.SlowLogSucc, mysql.TypeTiny, 1, 0, nil, nil},
{variable.SlowLogPlan, mysql.TypeLongBlob, types.UnspecifiedLength, 0, nil, nil},
{variable.SlowLogPrevStmt, mysql.TypeLongBlob, types.UnspecifiedLength, 0, nil, nil},
{variable.SlowLogQuerySQLStr, mysql.TypeLongBlob, types.UnspecifiedLength, 0, nil, nil},
}
func dataForSlowLog(ctx sessionctx.Context) ([][]types.Datum, error) {
return parseSlowLogFile(ctx.GetSessionVars().Location(), ctx.GetSessionVars().SlowQueryFile)
}
// parseSlowLogFile uses to parse slow log file.
// TODO: Support parse multiple log-files.
func parseSlowLogFile(tz *time.Location, filePath string) ([][]types.Datum, error) {
file, err := os.Open(filePath)
if err != nil {
return nil, errors.Trace(err)
}
defer func() {
if err = file.Close(); err != nil {
logutil.BgLogger().Error("close slow log file failed.", zap.String("file", filePath), zap.Error(err))
}
}()
return ParseSlowLog(tz, bufio.NewReader(file))
}
// ParseSlowLog exports for testing.
// TODO: optimize for parse huge log-file.
func ParseSlowLog(tz *time.Location, reader *bufio.Reader) ([][]types.Datum, error) {
var rows [][]types.Datum
startFlag := false
var st *slowQueryTuple
for {
lineByte, err := getOneLine(reader)
if err != nil {
if err == io.EOF {
return rows, nil
}
return rows, err
}
line := string(hack.String(lineByte))
// Check slow log entry start flag.
if !startFlag && strings.HasPrefix(line, variable.SlowLogStartPrefixStr) {
st = &slowQueryTuple{}
err = st.setFieldValue(tz, variable.SlowLogTimeStr, line[len(variable.SlowLogStartPrefixStr):])
if err != nil {
return rows, err
}
startFlag = true
continue
}
if startFlag {
// Parse slow log field.
if strings.HasPrefix(line, variable.SlowLogRowPrefixStr) {
line = line[len(variable.SlowLogRowPrefixStr):]
if strings.HasPrefix(line, variable.SlowLogPrevStmtPrefix) {
st.prevStmt = line[len(variable.SlowLogPrevStmtPrefix):]
} else {
fieldValues := strings.Split(line, " ")
for i := 0; i < len(fieldValues)-1; i += 2 {
field := fieldValues[i]
if strings.HasSuffix(field, ":") {
field = field[:len(field)-1]
}
err = st.setFieldValue(tz, field, fieldValues[i+1])
if err != nil {
return rows, err
}
}
}
} else if strings.HasSuffix(line, variable.SlowLogSQLSuffixStr) {
// Get the sql string, and mark the start flag to false.
err = st.setFieldValue(tz, variable.SlowLogQuerySQLStr, string(hack.Slice(line)))
if err != nil {
return rows, err
}
rows = append(rows, st.convertToDatumRow())
startFlag = false
} else {
startFlag = false
}
}
}
}
func getOneLine(reader *bufio.Reader) ([]byte, error) {
var resByte []byte
lineByte, isPrefix, err := reader.ReadLine()
if isPrefix {
// Need to read more data.
resByte = make([]byte, len(lineByte), len(lineByte)*2)
} else {
resByte = make([]byte, len(lineByte))
}
// Use copy here to avoid shallow copy problem.
copy(resByte, lineByte)
if err != nil {
return resByte, err
}
var tempLine []byte
for isPrefix {
tempLine, isPrefix, err = reader.ReadLine()
resByte = append(resByte, tempLine...)
// Use the max value of max_allowed_packet to check the single line length.
if len(resByte) > int(variable.MaxOfMaxAllowedPacket) {
return resByte, errors.Errorf("single line length exceeds limit: %v", variable.MaxOfMaxAllowedPacket)
}
if err != nil {
return resByte, err
}
}
return resByte, err
}
type slowQueryTuple struct {
time time.Time
txnStartTs uint64
user string
host string
connID uint64
queryTime float64
parseTime float64
compileTime float64
preWriteTime float64
commitTime float64
getCommitTSTime float64
commitBackoffTime float64
backoffTypes string
resolveLockTime float64
localLatchWaitTime float64
writeKeys uint64
writeSize uint64
prewriteRegion uint64
txnRetry uint64
processTime float64
waitTime float64
backOffTime float64
requestCount uint64
totalKeys uint64
processKeys uint64
db string
indexIDs string
digest string
statsInfo string
avgProcessTime float64
p90ProcessTime float64
maxProcessTime float64
maxProcessAddress string
avgWaitTime float64
p90WaitTime float64
maxWaitTime float64
maxWaitAddress string
memMax int64
prevStmt string
sql string
isInternal bool
succ bool
plan string
}
func (st *slowQueryTuple) setFieldValue(tz *time.Location, field, value string) error {
var err error
switch field {
case variable.SlowLogTimeStr:
st.time, err = ParseTime(value)
if err != nil {
break
}
if st.time.Location() != tz {
st.time = st.time.In(tz)
}
case variable.SlowLogTxnStartTSStr:
st.txnStartTs, err = strconv.ParseUint(value, 10, 64)
case variable.SlowLogUserStr:
fields := strings.SplitN(value, "@", 2)
if len(field) > 0 {
st.user = fields[0]
}
if len(field) > 1 {
st.host = fields[1]
}
case variable.SlowLogConnIDStr:
st.connID, err = strconv.ParseUint(value, 10, 64)
case variable.SlowLogQueryTimeStr:
st.queryTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogParseTimeStr:
st.parseTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCompileTimeStr:
st.compileTime, err = strconv.ParseFloat(value, 64)
case execdetails.PreWriteTimeStr:
st.preWriteTime, err = strconv.ParseFloat(value, 64)
case execdetails.CommitTimeStr:
st.commitTime, err = strconv.ParseFloat(value, 64)
case execdetails.GetCommitTSTimeStr:
st.getCommitTSTime, err = strconv.ParseFloat(value, 64)
case execdetails.CommitBackoffTimeStr:
st.commitBackoffTime, err = strconv.ParseFloat(value, 64)
case execdetails.BackoffTypesStr:
st.backoffTypes = value
case execdetails.ResolveLockTimeStr:
st.resolveLockTime, err = strconv.ParseFloat(value, 64)
case execdetails.LocalLatchWaitTimeStr:
st.localLatchWaitTime, err = strconv.ParseFloat(value, 64)
case execdetails.WriteKeysStr:
st.writeKeys, err = strconv.ParseUint(value, 10, 64)
case execdetails.WriteSizeStr:
st.writeSize, err = strconv.ParseUint(value, 10, 64)
case execdetails.PrewriteRegionStr:
st.prewriteRegion, err = strconv.ParseUint(value, 10, 64)
case execdetails.TxnRetryStr:
st.txnRetry, err = strconv.ParseUint(value, 10, 64)
case execdetails.ProcessTimeStr:
st.processTime, err = strconv.ParseFloat(value, 64)
case execdetails.WaitTimeStr:
st.waitTime, err = strconv.ParseFloat(value, 64)
case execdetails.BackoffTimeStr:
st.backOffTime, err = strconv.ParseFloat(value, 64)
case execdetails.RequestCountStr:
st.requestCount, err = strconv.ParseUint(value, 10, 64)
case execdetails.TotalKeysStr:
st.totalKeys, err = strconv.ParseUint(value, 10, 64)
case execdetails.ProcessKeysStr:
st.processKeys, err = strconv.ParseUint(value, 10, 64)
case variable.SlowLogDBStr:
st.db = value
case variable.SlowLogIndexNamesStr:
st.indexIDs = value
case variable.SlowLogIsInternalStr:
st.isInternal = value == "true"
case variable.SlowLogDigestStr:
st.digest = value
case variable.SlowLogStatsInfoStr:
st.statsInfo = value
case variable.SlowLogCopProcAvg:
st.avgProcessTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopProcP90:
st.p90ProcessTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopProcMax:
st.maxProcessTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopProcAddr:
st.maxProcessAddress = value
case variable.SlowLogCopWaitAvg:
st.avgWaitTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopWaitP90:
st.p90WaitTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopWaitMax:
st.maxWaitTime, err = strconv.ParseFloat(value, 64)
case variable.SlowLogCopWaitAddr:
st.maxWaitAddress = value
case variable.SlowLogMemMax:
st.memMax, err = strconv.ParseInt(value, 10, 64)
case variable.SlowLogSucc:
st.succ, err = strconv.ParseBool(value)
case variable.SlowLogPlan:
st.plan = value
case variable.SlowLogQuerySQLStr:
st.sql = value
}
if err != nil {
return errors.Wrap(err, "parse slow log failed `"+field+"` error")
}
return nil
}
func (st *slowQueryTuple) convertToDatumRow() []types.Datum {
record := make([]types.Datum, 0, len(slowQueryCols))
record = append(record, types.NewTimeDatum(types.Time{
Time: types.FromGoTime(st.time),
Type: mysql.TypeDatetime,
Fsp: types.MaxFsp,
}))
record = append(record, types.NewUintDatum(st.txnStartTs))
record = append(record, types.NewStringDatum(st.user))
record = append(record, types.NewStringDatum(st.host))
record = append(record, types.NewUintDatum(st.connID))
record = append(record, types.NewFloat64Datum(st.queryTime))
record = append(record, types.NewFloat64Datum(st.parseTime))
record = append(record, types.NewFloat64Datum(st.compileTime))
record = append(record, types.NewFloat64Datum(st.preWriteTime))
record = append(record, types.NewFloat64Datum(st.commitTime))
record = append(record, types.NewFloat64Datum(st.getCommitTSTime))
record = append(record, types.NewFloat64Datum(st.commitBackoffTime))
record = append(record, types.NewStringDatum(st.backoffTypes))
record = append(record, types.NewFloat64Datum(st.resolveLockTime))
record = append(record, types.NewFloat64Datum(st.localLatchWaitTime))
record = append(record, types.NewUintDatum(st.writeKeys))
record = append(record, types.NewUintDatum(st.writeSize))
record = append(record, types.NewUintDatum(st.prewriteRegion))
record = append(record, types.NewUintDatum(st.txnRetry))
record = append(record, types.NewFloat64Datum(st.processTime))
record = append(record, types.NewFloat64Datum(st.waitTime))
record = append(record, types.NewFloat64Datum(st.backOffTime))
record = append(record, types.NewUintDatum(st.requestCount))
record = append(record, types.NewUintDatum(st.totalKeys))
record = append(record, types.NewUintDatum(st.processKeys))
record = append(record, types.NewStringDatum(st.db))
record = append(record, types.NewStringDatum(st.indexIDs))
record = append(record, types.NewDatum(st.isInternal))
record = append(record, types.NewStringDatum(st.digest))
record = append(record, types.NewStringDatum(st.statsInfo))
record = append(record, types.NewFloat64Datum(st.avgProcessTime))
record = append(record, types.NewFloat64Datum(st.p90ProcessTime))
record = append(record, types.NewFloat64Datum(st.maxProcessTime))
record = append(record, types.NewStringDatum(st.maxProcessAddress))
record = append(record, types.NewFloat64Datum(st.avgWaitTime))
record = append(record, types.NewFloat64Datum(st.p90WaitTime))
record = append(record, types.NewFloat64Datum(st.maxWaitTime))
record = append(record, types.NewStringDatum(st.maxWaitAddress))
record = append(record, types.NewIntDatum(st.memMax))
if st.succ {
record = append(record, types.NewIntDatum(1))
} else {
record = append(record, types.NewIntDatum(0))
}
record = append(record, types.NewStringDatum(parsePlan(st.plan)))
record = append(record, types.NewStringDatum(st.prevStmt))
record = append(record, types.NewStringDatum(st.sql))
return record
}
func parsePlan(planString string) string {
if len(planString) <= len(variable.SlowLogPlanPrefix)+len(variable.SlowLogPlanSuffix) {
return planString
}
planString = planString[len(variable.SlowLogPlanPrefix) : len(planString)-len(variable.SlowLogPlanSuffix)]
decodePlanString, err := plancodec.DecodePlan(planString)
if err == nil {
planString = decodePlanString
} else {
logutil.BgLogger().Error("decode plan in slow log failed", zap.String("plan", planString), zap.Error(err))
}
return planString
}
// ParseTime exports for testing.
func ParseTime(s string) (time.Time, error) {
t, err := time.Parse(logutil.SlowLogTimeFormat, s)
if err != nil {
// This is for compatibility.
t, err = time.Parse(logutil.OldSlowLogTimeFormat, s)
if err != nil {
err = errors.Errorf("string \"%v\" doesn't has a prefix that matches format \"%v\", err: %v", s, logutil.SlowLogTimeFormat, err)
}
}
return t, err
}