Description:
I created a table in the Cluster stored on disk (I created a Tablespace before)
After that I filled it without any problems (a few million records). But I am wondering why the column "comment" is still in memory and not on the disk (since its not part of an index)?
-- suggestions --
Version: 1
Fragment type: 5
K Value: 6
Min load factor: 78
Max load factor: 80
Temporary table: no
Number of attributes: 8
Number of primary keys: 1
Length of frm data: 395
Row Checksum: 1
Row GCI: 1
TableStatus: Retrieved
-- Attributes --
id Int PRIMARY KEY DISTRIBUTION KEY AT=FIXED ST=MEMORY
comment Text(256,2000;16;latin1_swedish_ci) NOT NULL AT=FIXED ST=MEMORY
datetime Datetime NOT NULL AT=FIXED ST=DISK
user Text(256,2000;16;latin1_swedish_ci) NOT NULL AT=FIXED ST=MEMORY
ip Varchar(16;latin1_swedish_ci) NOT NULL AT=FIXED ST=DISK
userid Int NOT NULL AT=FIXED ST=DISK
refid Int NOT NULL AT=FIXED ST=MEMORY
channel Int NOT NULL AT=FIXED ST=MEMORY
-- Indexes --
PRIMARY KEY(id) - UniqueHashIndex
refid(refid) - OrderedIndex
idchannel$unique(id, channel) - UniqueHashIndex
idchannel(id, channel) - OrderedIndex
PRIMARY(id) - OrderedIndex
NDBT_ProgramExit: 0 - OK
mysql> select file_id, file_name , tablespace_name , engine, free_extents, total_extents, data_free, status from information_schema.files;
+---------+--------------+-----------------+------------+--------------+---------------+-----------+--------+
| file_id | file_name | tablespace_name | engine | free_extents | total_extents | data_free | status |
+---------+--------------+-----------------+------------+--------------+---------------+-----------+--------+
| 0 | datafile.dat | ts1 | ndbcluster | 2893 | 20000 | NULL | NORMAL |
| 0 | undofile.dat | ts1 | ndbcluster | 33505296 | 8388608 | NULL | NORMAL |
+---------+--------------+-----------------+------------+--------------+---------------+-----------+--------+
2 rows in set (0.00 sec)
mysql>
Additional question:
-are varchar fields in 5.1 still handeld as fixed length CHAR fields if they are not stored on disk?
How to repeat:
CREATE TABLE `suggestions` (
`id` int(11) NOT NULL auto_increment,
`comment` text NOT NULL,
`datetime` datetime NOT NULL default '0000-00-00 00:00:00',
`user` text NOT NULL,
`ip` varchar(16) NOT NULL default '',
`userid` int(11) NOT NULL default '0',
`refid` int(11) NOT NULL default '0',
`channel` int(11) NOT NULL default '1',
PRIMARY KEY (`id`),
UNIQUE KEY `idchannel` (`id`,`channel`),
KEY `refid` (`refid`)
)
TABLESPACE ts1 STORAGE DISK
ENGINE=NDBCLUSTER DEFAULT CHARSET=latin1;
