One of the silent killers of MySQL Connections is the MySQL Packet. Even the I/O Thread of MySQL Replication can be victimized by this.
According to the MySQL Documentation
You can also get these errors if you send a query to the server that is incorrect or too large. If mysqld receives a packet that is too large or out of order, it assumes that something has gone wrong with the client and closes the connection. If you need big queries (for example, if you are working with big BLOB columns), you can increase the query limit by setting the server's max_allowed_packet variable, which has a default value of 1MB. You may also need to increase the maximum packet size on the client end. More information on setting the packet size is given in Section C.5.2.10, “Packet too large”.
An INSERT or REPLACE statement that inserts a great many rows can also cause these sorts of errors. Either one of these statements sends a single request to the server irrespective of the number of rows to be inserted; thus, you can often avoid the error by reducing the number of rows sent per INSERT or REPLACE.
At the very least, you must make sure the packet sizes for both the machine you mysqldump'd from and the machine you are loading are identical.
There may be two(2) approaches you can take:
APPROACH #1 : Perform the mysqldump using --skip-extended-insert
This will make sure the MySQL Packet is not inundated with multiple BLOBs, TEXT fields. That way SQL INSERTs are performed one at a time. The major drawbacks are
- the mysqldump is much larger
- reloading such a dump takes much longer.
APPROACH #2 : Increase max_allowed_packet
This may be the preferred approach because implementing this is just a mysql restart away. Understanding what the MySQL Packet is may clarify this.
According to the page 99 of "Understanding MySQL Internals" (ISBN 0-596-00957-7), here are paragraphs 1-3 explaining it:
MySQL network communication code was
written under the assumption that
queries are always reasonably short,
and therefore can be sent to and
processed by the server in one chunk,
which is called a packet in MySQL
terminology. The server allocates the
memory for a temporary buffer to store
the packet, and it requests enough to
fit it entirely. This architecture
requires a precaution to avoid having
the server run out of memory---a cap
on the size of the packet, which this
option accomplishes.
The code of interest in relation to
this option is found in
sql/net_serv.cc. Take a look at my_net_read(), then follow the call to my_real_read() and pay
particular attention to
net_realloc().
This variable also limits the length
of a result of many string functons.
See sql/field.cc and
sql/intem_strfunc.cc for details.
Given this explanation, making bulk INSERTs will load/unload a MySQL Packet rather quickly. This is especially true when max_allowed_packet is too small for the given load of data coming at it.
CONCLUSION
In most installs of MySQL, I usually set this to 256M or 512M. You should experiement with larger values when data loads produces "MySQL has gone away" errors.
Are you looking for LOAD DATA
LOCAL
INFILE
?
If LOCAL
is specified, the file is read by the client program on the client host and sent to the server. The file can be given as a full path name to specify its exact location. If given as a relative path name, the name is interpreted relative to the directory in which the client program was started.
http://dev.mysql.com/doc/refman/5.5/en/load-data.html
Update: The original question exhibits a significant misunderstanding about LOAD DATA INFILE
that originally escaped my attention:
'load data infile into table name' command can only be used for loading in local system only.
The client was referred to as being "local" and the server was referred to as being "remote," which makes that statement 100% incorrect.
LOAD DATA INFILE
requires that the file already be on the server's filesystem, and adding LOCAL
means it must be on the client's filesystem.
From the documentation:
If LOCAL
is specified, the file is read by the client program on the client host and sent to the server.
If LOCAL
is not specified, the file must be located on the server host and is read directly by the server.
Best Answer
Since this is Windows we are dealing with, either use the double backslash
or the forward slash
It says so in the MySQL Documentation on
LOAD DATA INFILE