Packet for query is too large

• ====proceeding image: bc69f26a-a55d-4cd5-b527-8ca69a26c98f.jpg
  2020-04-16 11:38:26.733 [main] ERROR druid.sql.Statement:149 - {conn-10004, pstmt-20009} execute error. insert into wuliu_user_picture(file_name,file_path,owner,file_blob) values(?,?,?,?)
  com.mysql.jdbc.PacketTooBigException: Packet for query is too large (4253984 > 4194304). You can change this value on the server by setting the max_allowed_packet' variable.
  at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3683)

mysql 插入图片时，图片太大