diff --git a/infoschema/tables.go b/infoschema/tables.go
index 93fb6edfdd3d8..ce2afb4954f65 100644
--- a/infoschema/tables.go
+++ b/infoschema/tables.go
@@ -231,7 +231,7 @@ type columnInfo struct {
 func buildColumnInfo(col columnInfo) *model.ColumnInfo {
 	mCharset := charset.CharsetBin
 	mCollation := charset.CharsetBin
-	if col.tp == mysql.TypeVarchar || col.tp == mysql.TypeBlob {
+	if col.tp == mysql.TypeVarchar || col.tp == mysql.TypeBlob || col.tp == mysql.TypeLongBlob {
 		mCharset = charset.CharsetUTF8MB4
 		mCollation = charset.CollationUTF8MB4
 	}
@@ -690,7 +690,7 @@ var tableProcesslistCols = []columnInfo{
 	{name: "COMMAND", tp: mysql.TypeVarchar, size: 16, flag: mysql.NotNullFlag, deflt: ""},
 	{name: "TIME", tp: mysql.TypeLong, size: 7, flag: mysql.NotNullFlag, deflt: 0},
 	{name: "STATE", tp: mysql.TypeVarchar, size: 7},
-	{name: "INFO", tp: mysql.TypeString, size: 512},
+	{name: "INFO", tp: mysql.TypeLongBlob, size: types.UnspecifiedLength},
 	{name: "MEM", tp: mysql.TypeLonglong, size: 21, flag: mysql.UnsignedFlag},
 	{name: "TxnStart", tp: mysql.TypeVarchar, size: 64, flag: mysql.NotNullFlag, deflt: ""},
 }
@@ -861,7 +861,7 @@ var tableClusterLogCols = []columnInfo{
 	{name: "TYPE", tp: mysql.TypeVarchar, size: 64},
 	{name: "INSTANCE", tp: mysql.TypeVarchar, size: 64},
 	{name: "LEVEL", tp: mysql.TypeVarchar, size: 8},
-	{name: "MESSAGE", tp: mysql.TypeVarString, size: 1024},
+	{name: "MESSAGE", tp: mysql.TypeLongBlob, size: types.UnspecifiedLength},
 }
 
 var tableClusterLoadCols = []columnInfo{
diff --git a/infoschema/tables_test.go b/infoschema/tables_test.go
index ddb9ed08e6802..91f75be8425c7 100644
--- a/infoschema/tables_test.go
+++ b/infoschema/tables_test.go
@@ -301,10 +301,19 @@ func (s *testTableSuite) TestInfoschemaFieldValue(c *C) {
 			"  `COMMAND` varchar(16) NOT NULL DEFAULT '',\n" +
 			"  `TIME` int(7) NOT NULL DEFAULT 0,\n" +
 			"  `STATE` varchar(7) DEFAULT NULL,\n" +
-			"  `INFO` binary(512) DEFAULT NULL,\n" +
+			"  `INFO` longtext DEFAULT NULL,\n" +
 			"  `MEM` bigint(21) unsigned DEFAULT NULL,\n" +
 			"  `TxnStart` varchar(64) NOT NULL DEFAULT ''\n" +
 			") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin"))
+	tk.MustQuery("show create table information_schema.cluster_log").Check(
+		testkit.Rows("" +
+			"CLUSTER_LOG CREATE TABLE `CLUSTER_LOG` (\n" +
+			"  `TIME` varchar(32) DEFAULT NULL,\n" +
+			"  `TYPE` varchar(64) DEFAULT NULL,\n" +
+			"  `INSTANCE` varchar(64) DEFAULT NULL,\n" +
+			"  `LEVEL` varchar(8) DEFAULT NULL,\n" +
+			"  `MESSAGE` longtext DEFAULT NULL\n" +
+			") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin"))
 }
 
 func (s *testTableSuite) TestCharacterSetCollations(c *C) {