Limit database connections (#980, #564) (#998)

* Limit database connections (#564)

- Add new options to the config file database:
      max_open_conns: 100
      max_idle_conns: 2
      conn_max_lifetime: -1
- Implement connection parameter setup on the *DB (database/sql) in internal/sqlutil/trace.go:Open()
- Propagate the values in the form of DbProperties interface via all the
  Open() and NewDatabase() functions

Signed-off-by: Tomas Jirka <tomas.jirka@email.cz>

* Fix wasm builds

* Remove file accidentally added from working tree

Co-authored-by: Tomas Jirka <tomas.jirka@email.cz>

cmd/dendrite-demo-libp2p/main.go

@@ -56,6 +56,7 @@ func createKeyDB(
 ) keydb.Database {
 	db, err := keydb.NewDatabase(
 		string(base.Base.Cfg.Database.ServerKey),
+		base.Base.Cfg.DbProperties(),
 		base.Base.Cfg.Matrix.ServerName,
 		base.Base.Cfg.Matrix.PrivateKey.Public().(ed25519.PublicKey),
 		base.Base.Cfg.Matrix.KeyID,

cmd/dendrite-demo-libp2p/storage/postgreswithdht/storage.go

@@ -45,7 +45,7 @@ type PublicRoomsServerDatabase struct {
 
 // NewPublicRoomsServerDatabase creates a new public rooms server database.
 func NewPublicRoomsServerDatabase(dataSourceName string, dht *dht.IpfsDHT) (*PublicRoomsServerDatabase, error) {
-	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName)
+	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName, nil)
 	if err != nil {
 		return nil, err
 	}

cmd/dendrite-demo-libp2p/storage/postgreswithpubsub/storage.go

@@ -48,7 +48,7 @@ type PublicRoomsServerDatabase struct {
 
 // NewPublicRoomsServerDatabase creates a new public rooms server database.
 func NewPublicRoomsServerDatabase(dataSourceName string, pubsub *pubsub.PubSub) (*PublicRoomsServerDatabase, error) {
-	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName)
+	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName, nil)
 	if err != nil {
 		return nil, err
 	}