storj/private/dbutil/defaults.go

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// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package dbutil
import (
"database/sql"
"flag"
monkit "gopkg.in/spacemonkeygo/monkit.v2"
)
var (
maxIdleConns = flag.Int("db.max_idle_conns", 20, "Maximum Amount of Idle Database connections, -1 means the stdlib default")
maxOpenConns = flag.Int("db.max_open_conns", 25, "Maximum Amount of Open Database connections, -1 means the stdlib default")
connMaxLifetime = flag.Duration("db.conn_max_lifetime", -1, "Maximum Database Connection Lifetime, -1ns means the stdlib default")
)
// Configure Sets Connection Boundaries and adds db_stats monitoring to monkit
func Configure(db *sql.DB, mon *monkit.Scope) {
if *maxIdleConns >= 0 {
db.SetMaxIdleConns(*maxIdleConns)
}
if *maxOpenConns >= 0 {
db.SetMaxOpenConns(*maxOpenConns)
}
if *connMaxLifetime >= 0 {
db.SetConnMaxLifetime(*connMaxLifetime)
}
mon.Chain("db_stats", monkit.StatSourceFunc(
func(cb func(name string, val float64)) {
monkit.StatSourceFromStruct(db.Stats()).Stats(cb)
}))
}