diff --git a/weed/command/scaffold/filer.toml b/weed/command/scaffold/filer.toml
index 52df80744..397b93887 100644
--- a/weed/command/scaffold/filer.toml
+++ b/weed/command/scaffold/filer.toml
@@ -68,7 +68,7 @@ port = 3306
 username = "root"
 password = ""
 database = ""              # create or use an existing database
-connection_max_idle = 10
+connection_max_idle = 50
 connection_max_open = 50
 connection_max_lifetime_seconds = 300
 interpolateParams = false
@@ -97,7 +97,7 @@ port = 3306
 username = "root"
 password = ""
 database = ""              # create or use an existing database
-connection_max_idle = 10
+connection_max_idle = 50
 connection_max_open = 50
 connection_max_lifetime_seconds = 300
 interpolateParams = false
@@ -127,7 +127,7 @@ sslmode = "disable"
 # sslkey = "/path/to/client.key"      # client private key file
 # sslrootcert = "/path/to/ca.crt"     # CA certificate file
 # sslcrl = "/path/to/client.crl"      # Certificate Revocation List (CRL) (optional)
-connection_max_idle = 10
+connection_max_idle = 50
 connection_max_open = 50
 connection_max_lifetime_seconds = 300
 # Set to true when using PgBouncer connection pooler
@@ -166,7 +166,7 @@ sslmode = "disable"
 # sslkey = "/path/to/client.key"      # client private key file
 # sslrootcert = "/path/to/ca.crt"     # CA certificate file
 # sslcrl = "/path/to/client.crl"      # Certificate Revocation List (CRL) (optional)
-connection_max_idle = 10
+connection_max_idle = 50
 connection_max_open = 50
 connection_max_lifetime_seconds = 300
 # Set to true when using PgBouncer connection pooler
diff --git a/weed/filer/mysql/mysql_store.go b/weed/filer/mysql/mysql_store.go
index abcef6fe6..5a7cf9da0 100644
--- a/weed/filer/mysql/mysql_store.go
+++ b/weed/filer/mysql/mysql_store.go
@@ -33,8 +33,12 @@ func (store *MysqlStore) GetName() string {
 }
 
 func (store *MysqlStore) Initialize(configuration util.Configuration, prefix string) (err error) {
-	// Absent key keeps a pooled default; an explicit 0 disables the idle pool.
-	configuration.SetDefault(prefix+"connection_max_idle", 2)
+	// Fewer idle slots than concurrent operations means a fresh connection per
+	// operation, until the filer runs out of ephemeral ports. connection_max_open
+	// stays unset: a listing runs a second query from its own callback, so a
+	// bounded pool deadlocks once the concurrency reaches it.
+	configuration.SetDefault(prefix+"connection_max_idle", 50)
+	configuration.SetDefault(prefix+"connection_max_lifetime_seconds", 300)
 	// Default on so minimal configs avoid the duplicate-key roundtrip the
 	// inode-index KvPut would otherwise emit on every write.
 	configuration.SetDefault(prefix+"enableUpsert", true)
diff --git a/weed/filer/mysql2/mysql2_store.go b/weed/filer/mysql2/mysql2_store.go
index 0783398a3..e8b0af261 100644
--- a/weed/filer/mysql2/mysql2_store.go
+++ b/weed/filer/mysql2/mysql2_store.go
@@ -33,8 +33,12 @@ func (store *MysqlStore2) GetName() string {
 }
 
 func (store *MysqlStore2) Initialize(configuration util.Configuration, prefix string) (err error) {
-	// Absent key keeps a pooled default; an explicit 0 disables the idle pool.
-	configuration.SetDefault(prefix+"connection_max_idle", 2)
+	// Fewer idle slots than concurrent operations means a fresh connection per
+	// operation, until the filer runs out of ephemeral ports. connection_max_open
+	// stays unset: a listing runs a second query from its own callback, so a
+	// bounded pool deadlocks once the concurrency reaches it.
+	configuration.SetDefault(prefix+"connection_max_idle", 50)
+	configuration.SetDefault(prefix+"connection_max_lifetime_seconds", 300)
 	// Default on so minimal configs avoid the duplicate-key roundtrip the
 	// inode-index KvPut would otherwise emit on every write.
 	configuration.SetDefault(prefix+"enableUpsert", true)
diff --git a/weed/filer/postgres/postgres_store.go b/weed/filer/postgres/postgres_store.go
index c694f77c3..62f27b327 100644
--- a/weed/filer/postgres/postgres_store.go
+++ b/weed/filer/postgres/postgres_store.go
@@ -28,8 +28,12 @@ func (store *PostgresStore) GetName() string {
 }
 
 func (store *PostgresStore) Initialize(configuration util.Configuration, prefix string) (err error) {
-	// Absent key keeps a pooled default; an explicit 0 disables the idle pool.
-	configuration.SetDefault(prefix+"connection_max_idle", 2)
+	// Fewer idle slots than concurrent operations means a fresh connection per
+	// operation, until the filer runs out of ephemeral ports. connection_max_open
+	// stays unset: a listing runs a second query from its own callback, so a
+	// bounded pool deadlocks once the concurrency reaches it.
+	configuration.SetDefault(prefix+"connection_max_idle", 50)
+	configuration.SetDefault(prefix+"connection_max_lifetime_seconds", 300)
 	// Default on so minimal configs are not exposed to duplicate-key tx
 	// poisoning on Postgres; an explicit false still disables it.
 	configuration.SetDefault(prefix+"enableUpsert", true)
diff --git a/weed/filer/postgres2/postgres2_store.go b/weed/filer/postgres2/postgres2_store.go
index e846bdf9f..2eb85764a 100644
--- a/weed/filer/postgres2/postgres2_store.go
+++ b/weed/filer/postgres2/postgres2_store.go
@@ -33,8 +33,12 @@ func (store *PostgresStore2) GetName() string {
 }
 
 func (store *PostgresStore2) Initialize(configuration util.Configuration, prefix string) (err error) {
-	// Absent key keeps a pooled default; an explicit 0 disables the idle pool.
-	configuration.SetDefault(prefix+"connection_max_idle", 2)
+	// Fewer idle slots than concurrent operations means a fresh connection per
+	// operation, until the filer runs out of ephemeral ports. connection_max_open
+	// stays unset: a listing runs a second query from its own callback, so a
+	// bounded pool deadlocks once the concurrency reaches it.
+	configuration.SetDefault(prefix+"connection_max_idle", 50)
+	configuration.SetDefault(prefix+"connection_max_lifetime_seconds", 300)
 	// Default on so minimal configs are not exposed to duplicate-key tx
 	// poisoning on Postgres; an explicit false still disables it.
 	configuration.SetDefault(prefix+"enableUpsert", true)