// NewConnectionPool creates a new ConnectionPool. The name is used
// to publish stats only.
func NewConnectionPool(name string, capacity int, idleTimeout time.Duration) *ConnectionPool {
cp := &ConnectionPool{capacity: capacity, idleTimeout: idleTimeout}
if name == "" {
return cp
}
stats.Publish(name+"Capacity", stats.IntFunc(cp.Capacity))
stats.Publish(name+"Available", stats.IntFunc(cp.Available))
stats.Publish(name+"MaxCap", stats.IntFunc(cp.MaxCap))
stats.Publish(name+"WaitCount", stats.IntFunc(cp.WaitCount))
stats.Publish(name+"WaitTime", stats.DurationFunc(cp.WaitTime))
stats.Publish(name+"IdleTimeout", stats.DurationFunc(cp.IdleTimeout))
return cp
}
func NewSchemaInfo(queryCacheSize int, reloadTime time.Duration, idleTimeout time.Duration) *SchemaInfo {
si := &SchemaInfo{
queries: cache.NewLRUCache(int64(queryCacheSize)),
connPool: dbconnpool.NewConnectionPool("", 2, idleTimeout),
ticks: timer.NewTimer(reloadTime),
}
stats.Publish("QueryCacheLength", stats.IntFunc(si.queries.Length))
stats.Publish("QueryCacheSize", stats.IntFunc(si.queries.Size))
stats.Publish("QueryCacheCapacity", stats.IntFunc(si.queries.Capacity))
stats.Publish("QueryCacheOldest", stats.StringFunc(func() string {
return fmt.Sprintf("%v", si.queries.Oldest())
}))
stats.Publish("SchemaReloadTime", stats.DurationFunc(si.ticks.Interval))
_ = stats.NewMultiCountersFunc("TableStats", []string{"Table", "Stats"}, si.getTableStats)
_ = stats.NewMultiCountersFunc("TableInvalidations", []string{"Table"}, si.getTableInvalidations)
_ = stats.NewMultiCountersFunc("QueryCounts", []string{"Table", "Plan"}, si.getQueryCount)
_ = stats.NewMultiCountersFunc("QueryTimesNs", []string{"Table", "Plan"}, si.getQueryTime)
_ = stats.NewMultiCountersFunc("QueryRowCounts", []string{"Table", "Plan"}, si.getQueryRowCount)
_ = stats.NewMultiCountersFunc("QueryErrorCounts", []string{"Table", "Plan"}, si.getQueryErrorCount)
http.Handle("/debug/query_plans", si)
http.Handle("/debug/query_stats", si)
http.Handle("/debug/table_stats", si)
http.Handle("/debug/schema", si)
return si
}
func NewTxPool(name string, capacity int, timeout, poolTimeout, idleTimeout time.Duration) *TxPool {
axp := &TxPool{
pool: dbconnpool.NewConnectionPool(name, capacity, idleTimeout),
activePool: pools.NewNumbered(),
lastId: sync2.AtomicInt64(time.Now().UnixNano()),
timeout: sync2.AtomicDuration(timeout),
poolTimeout: sync2.AtomicDuration(poolTimeout),
ticks: timer.NewTimer(timeout / 10),
txStats: stats.NewTimings("Transactions"),
}
// Careful: pool also exports name+"xxx" vars,
// but we know it doesn't export Timeout.
stats.Publish(name+"Timeout", stats.DurationFunc(axp.timeout.Get))
stats.Publish(name+"PoolTimeout", stats.DurationFunc(axp.poolTimeout.Get))
return axp
}
func NewCachePool(name string, rowCacheConfig RowCacheConfig, queryTimeout time.Duration, idleTimeout time.Duration) *CachePool {
cp := &CachePool{name: name, idleTimeout: idleTimeout}
if name != "" {
cp.memcacheStats = NewMemcacheStats(cp, true, false, false)
stats.Publish(name+"ConnPoolCapacity", stats.IntFunc(cp.Capacity))
stats.Publish(name+"ConnPoolAvailable", stats.IntFunc(cp.Available))
stats.Publish(name+"ConnPoolMaxCap", stats.IntFunc(cp.MaxCap))
stats.Publish(name+"ConnPoolWaitCount", stats.IntFunc(cp.WaitCount))
stats.Publish(name+"ConnPoolWaitTime", stats.DurationFunc(cp.WaitTime))
stats.Publish(name+"ConnPoolIdleTimeout", stats.DurationFunc(cp.IdleTimeout))
}
http.Handle(statsURL, cp)
if rowCacheConfig.Binary == "" {
return cp
}
cp.rowCacheConfig = rowCacheConfig
// Start with memcached defaults
cp.capacity = 1024 - 50
cp.port = "11211"
if rowCacheConfig.Socket != "" {
cp.port = rowCacheConfig.Socket
}
if rowCacheConfig.TcpPort > 0 {
//address: ":11211"
cp.port = ":" + strconv.Itoa(rowCacheConfig.TcpPort)
}
if rowCacheConfig.Connections > 0 {
if rowCacheConfig.Connections <= 50 {
log.Fatalf("insufficient capacity: %d", rowCacheConfig.Connections)
}
cp.capacity = rowCacheConfig.Connections - 50
}
seconds := uint64(queryTimeout / time.Second)
// Add an additional grace period for
// memcache expiry of deleted items
if seconds != 0 {
cp.DeleteExpiry = 2*seconds + 15
}
return cp
}
// NewQueryEngine creates a new QueryEngine.
// This is a singleton class.
// You must call this only once.
func NewQueryEngine(config Config) *QueryEngine {
qe := &QueryEngine{}
qe.schemaInfo = NewSchemaInfo(
config.QueryCacheSize,
time.Duration(config.SchemaReloadTime*1e9),
time.Duration(config.IdleTimeout*1e9),
)
qe.queryRuleInfo = NewQueryRuleInfo()
mysqlStats = stats.NewTimings("Mysql")
// Pools
qe.cachePool = NewCachePool(
"Rowcache",
config.RowCache,
time.Duration(config.QueryTimeout*1e9),
time.Duration(config.IdleTimeout*1e9),
)
qe.connPool = dbconnpool.NewConnectionPool(
"ConnPool",
config.PoolSize,
time.Duration(config.IdleTimeout*1e9),
)
qe.streamConnPool = dbconnpool.NewConnectionPool(
"StreamConnPool",
config.StreamPoolSize,
time.Duration(config.IdleTimeout*1e9),
)
// Services
qe.txPool = NewTxPool(
"TransactionPool",
config.TransactionCap,
time.Duration(config.TransactionTimeout*1e9),
time.Duration(config.TxPoolTimeout*1e9),
time.Duration(config.IdleTimeout*1e9),
)
qe.connKiller = NewConnectionKiller(1, time.Duration(config.IdleTimeout*1e9))
qe.consolidator = NewConsolidator()
qe.invalidator = NewRowcacheInvalidator(qe)
qe.streamQList = NewQueryList(qe.connKiller)
// Vars
qe.queryTimeout.Set(time.Duration(config.QueryTimeout * 1e9))
qe.spotCheckFreq = sync2.AtomicInt64(config.SpotCheckRatio * spotCheckMultiplier)
if config.StrictMode {
qe.strictMode.Set(1)
}
qe.strictTableAcl = config.StrictTableAcl
qe.maxResultSize = sync2.AtomicInt64(config.MaxResultSize)
qe.maxDMLRows = sync2.AtomicInt64(config.MaxDMLRows)
qe.streamBufferSize = sync2.AtomicInt64(config.StreamBufferSize)
// loggers
qe.accessCheckerLogger = logutil.NewThrottledLogger("accessChecker", 1*time.Second)
// Stats
stats.Publish("MaxResultSize", stats.IntFunc(qe.maxResultSize.Get))
stats.Publish("MaxDMLRows", stats.IntFunc(qe.maxDMLRows.Get))
stats.Publish("StreamBufferSize", stats.IntFunc(qe.streamBufferSize.Get))
stats.Publish("QueryTimeout", stats.DurationFunc(qe.queryTimeout.Get))
queryStats = stats.NewTimings("Queries")
QPSRates = stats.NewRates("QPS", queryStats, 15, 60*time.Second)
waitStats = stats.NewTimings("Waits")
killStats = stats.NewCounters("Kills")
infoErrors = stats.NewCounters("InfoErrors")
errorStats = stats.NewCounters("Errors")
internalErrors = stats.NewCounters("InternalErrors")
resultStats = stats.NewHistogram("Results", resultBuckets)
stats.Publish("RowcacheSpotCheckRatio", stats.FloatFunc(func() float64 {
return float64(qe.spotCheckFreq.Get()) / spotCheckMultiplier
}))
spotCheckCount = stats.NewInt("RowcacheSpotCheckCount")
return qe
}