Oracle 5.0 Reference Manual page 357

myisampack
87.14%
Remember to run myisamchk -rq on compressed tables
shell> ls -l station.*
-rw-rw-r-- 1 monty
-rw-rw-r-- 1 monty
-rw-rw-r-- 1 monty
shell> myisamchk -dvv station
MyISAM file: station
Isam-version: 2
Creation time: 1996-03-13 10:08:58
Recover time: 1997-04-17 19:04:26
Data records:
Datafile parts:
Datafile pointer (bytes):
Max datafile length:
Recordlength:
Record format: Compressed
table description:
Key Start Len Index
1 2 4 unique
2 32 30 multip. text
Field Start Length Type
1 1 1 constant
2 2 4 zerofill(1)
3 6 4 no zeros, zerofill(1)
4 10 1
5 11 20 table-lookup
6 31 1
7 32 30 no endspace, not_always
8 62 35 no endspace, not_always, no empty
9 97 35 no empty
10 132 35 no endspace, not_always, no empty
11 167 4 zerofill(1)
12 171 16 no endspace, not_always, no empty
13 187 35 no endspace, not_always, no empty
14 222 4 zerofill(1)
15 226 16 no endspace, not_always, no empty
16 242 20 no endspace, not_always
17 262 20 no endspace, no empty
18 282 20 no endspace, no empty
19 302 30 no endspace, no empty
20 332 4 always zero
21 336 4 always zero
22 340 1
23 341 8 table-lookup
24 349 8 table-lookup
25 357 8 always zero
26 365 2
27 367 2 no zeros, zerofill(1)
28 369 4 no zeros, zerofill(1)
29 373 4 table-lookup
30 377 1
31 378 2 no zeros, zerofill(1)
32 380 8 no zeros
33 388 4 always zero
34 392 4 table-lookup
35 396 4 no zeros, zerofill(1)
36 400 4 no zeros, zerofill(1)
37 404 1
38 405 4 no zeros
39 409 4 always zero
40 413 4 no zeros
41 417 4 always zero
42 421 4 no zeros
43 425 4 always zero
44 429 20 no empty
45 449 30 no empty
— Generate Compressed, Read-Only MyISAM Tables
my 127874 Apr 17 19:00 station.MYD
my 55296 Apr 17 19:04 station.MYI
my 5767 Apr 17 19:00 station.frm
1192 Deleted blocks:
1192 Deleted data:
3 Keyfile pointer (bytes):
16777215 Max keyfile length:
834
Type Root
unsigned long 10240
54272
337
0
0
1
131071
Blocksize Rec/key
1024 1
1024 1
Huff tree Bits
1 0
2 9
2 9
3 9
4 0
3 9
5 9
6 9
7 9
6 9
2 9
5 9
6 9
2 9
5 9
8 9
8 9
5 9
6 9
2 9
2 9
3 9
9 0
10 0
2 9
2 9
2 9
2 9
11 0
3 9
2 9
2 9
2 9
12 0
13 9
2 9
2 9
2 9
2 9
2 9
2 9
2 9
2 9
3 9
3 9