A regular analysis table
ANALYZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tbl_name [, tbl_name]
Second, regular inspection table
CHECK TABLE tbl_name [, tbl_name] [option]
NOTE: CHECK TABLE can also check if there is an error view, such as in the view definition referenced table no longer exists.
Third, the periodic table optimization
OPTIMIZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tbl_name [, tbl_name]
OPTIMIZE TABLE only for MyISAM, BDB and InnoDB tables. For MyISAM tables, OPTIMIZE TABLE operation as follows: If the table has been deleted or decomposed rows, repair the table. If you do not index pages are classified, the classification. If the statistical data table is not updated (and the repair can not be achieved by the index classification) is updated.
Note: Note that both ANALYZE, CHECK or OPTIMIZE table will be locked during execution, so please pay attention to these operations to be performed when the database is not busy.
Fourth, access to relevant information table
show table status obtaining table information show table status like 'tableName' \ G
Name Table Name
Engine table storage engine
Version version
Row_format
line format. For MyISAM engine, which may be Dynamic, Fixed, or Compressed. Dynamic row line length
variable, e.g. Varchar or Blob type field. A row is fixed constant row length, e.g. Char and Integer type word
segment.
Rows
The number of rows in the table. For non-transactional tables, this value is accurate for transactional engine, this value is usually estimated.
Avg_row_length
average number of bytes per row comprising.
Data_length
data amount of the entire table (unit: bytes).
Max_data_length
table can accommodate the maximum amount of data.
Index_length
index footprint size of the disk.
Data_free
for MyISAM engine, identity has been allocated but unused space now, and includes space has been deleted rows.
Auto_increment
a lower value Auto_increment.
Create_time
create a time table.
Update_time
table last update time.
Check_time
using check table or myisamchk tool checklist of recent times.
Collation
default character set and collation of the table.
Checksum
if enabled, when calculating the content of a table checksum.
Create_options
refers to all the other options at the time of table creation.
Comment
contains other additional information, for MyISAM engine, including a new comment Xu Biao, if the table using innodb engine, the remaining space reality table. If it is a view, which contains comments VIEW words.