也许 max_allowed_pa​​cket

1.jpg是小图片，而2.jpg是大图片

1.jpg is a small picture and 2.jpg is a big picture

mysql> DESCRIBE  blob_files;
+-------+---------+------+-----+---------+----------------+
| Field | Type    | Null | Key | Default | Extra          |
+-------+---------+------+-----+---------+----------------+
| id    | int(11) | NO   | PRI | NULL    | auto_increment |
| file  | blob    | YES  |     | NULL    |                |
+-------+---------+------+-----+---------+----------------+
2 rows in set (0.01 sec)

mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/2.jpg'));
Query OK, 1 row affected, 1 warning (0.00 sec)

mysql> SHOW WARNINGS;
+---------+------+--------------------------------------------------------------
------------------+
| Level   | Code | Message
                  |
+---------+------+--------------------------------------------------------------
------------------+
| Warning | 1301 | Result of load_file() was larger than max_allowed_packet (104
8576) - truncated |
+---------+------+--------------------------------------------------------------
------------------+
1 row in set (0.00 sec)

mysql> INSERT INTO blob_files(file) VALUE(LOAD_FILE('D:/1.jpg'));
Query OK, 1 row affected (0.05 sec)