Add new database limits

api/account/common.go

@@ -19,6 +19,7 @@ package account
 
 import (
 	"regexp"
+	"runtime"
 
 	"golang.org/x/crypto/argon2"
 )
@@ -34,13 +35,13 @@ const (
 	ArgonKeySize  = 32
 	ArgonSaltSize = 16
 
-	ArgonMaxInstances = 16
-
 	UUIDSize  = 16
 	TokenSize = 32
 )
 
 var (
+	ArgonMaxInstances = runtime.NumCPU()
+
 	isValidUsername = regexp.MustCompile(`^\w{1,16}$`).MatchString
 	semaphore       = make(chan bool, ArgonMaxInstances)
 )

db/db.go

@@ -21,9 +21,11 @@ import (
 	"database/sql"
 	"encoding/hex"
 	"fmt"
-	_ "github.com/go-sql-driver/mysql"
 	"log"
 	"os"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
 )
 
 var handle *sql.DB
@@ -36,7 +38,10 @@ func Init(username, password, protocol, address, database string) error {
 		return fmt.Errorf("failed to open database connection: %s", err)
 	}
 
-	handle.SetMaxOpenConns(1000)
+	handle.SetMaxIdleConns(256)
+	handle.SetMaxOpenConns(256)
+	handle.SetConnMaxIdleTime(time.Second * 30)
+	handle.SetConnMaxLifetime(time.Minute)
 
 	tx, err := handle.Begin()
 	if err != nil {