Innodb inspector, show the innodb table space file segments and pages information.
Just for learning innodb storage format.
Overview the innodb table space file:
innoisp overview -f db.ibd
This command will show the table space file overview, following content will be output.
==========PAGE 0==========
page num 0, offset 0x00000000, page type <File space header>
File header:
Type <8> Checksum <0x4A13803A> Offset <0> Prev <0x00000000> Next <0x00000000> Log sequence number <1204662235189> Space ID <4202>
Page header:
Heap top <0x0000> N heap <0x0000> Free <0x0000> Garbage <0x0000> Last insert <0x0000> Direction <0x0000> N direction <0x0000> N recs <0x0000> Index id <0x0000000000000000> Leaf inode <0x00000000:0x0000> Non-leaf inode <0x00000000:0x0000>
File trailer:
Check sum<0x593CFE62> LSN<2071392309>
==========PAGE 1==========
page num 1, offset 0x00004000, page type <Insert Buffer bit map>
File header:
Type <5> Checksum <0x510BC8E0> Offset <1> Prev <0x00000000> Next <0x00000000> Log sequence number <1241148196> Space ID <4202>
Page header:
Heap top <0x0000> N heap <0x0000> Free <0x0000> Garbage <0x0000> Last insert <0x0000> Direction <0x0000> N direction <0x0000> N recs <0x0000> Index id <0x0000000000000000> Leaf inode <0x00000000:0x0000> Non-leaf inode <0x00000000:0x0000>
File trailer:
Check sum<0x203DCEE2> LSN<1241148196>
==========PAGE 2==========
page num 2, offset 0x00008000, page type <File segment inode>
File header:
Type <3> Checksum <0x259DFC10> Offset <2> Prev <0x00000000> Next <0x00000000> Log sequence number <1204662235189> Space ID <4202>
Page header:
Heap top <0x0000> N heap <0x0000> Free <0x0000> Garbage <0x0000> Last insert <0x0000> Direction <0x0000> N direction <0x0000> N recs <0x0000> Index id <0x0000000000000000> Leaf inode <0x00000000:0x0000> Non-leaf inode <0x00000000:0x0000>
File trailer:
Check sum<0x0272F708> LSN<2071392309>
==========PAGE 3==========
page num 3, offset 0x0000C000, page type <Index> level <2>
File header:
Type <17855> Checksum <0x587D68EB> Offset <3> Prev <0xFFFFFFFF> Next <0xFFFFFFFF> Log sequence number <1204662235189> Space ID <4202>
Page header:
Heap top <0x0092> N heap <0x8004> Free <0x0000> Garbage <0x0000> Last insert <0x008A> Direction <0x0002> N direction <0x0001> N recs <0x0002> Index id <0x000000000000110D> Leaf inode <0x00000002:0x00F2> Non-leaf inode <0x00000002:0x0032>
File trailer:
Check sum<0x598B926C> LSN<2071392309>
Page directory slots (2 total):
[0x0070 0x0063]
This command will show the index page's directory slot
innoisp dslots -f db.ibd
==========PAGE 3 OFFSET 0xC000 LEVEL 2==========
slot offset type owned key
0 0x0063 infimum 1 N/A
slot reference: [infimum own 1 0x0063]
1 0x0070 supremum 3 N/A
slot reference: [0x007D K0]->[0x008A K0]->[supremum own 3 0x0070]
........................................
This command will show the file space header page and extend descriptor page information
innoisp space -f db.ibd
==========PAGE 0 OFFSET 0x0000==========
space id page allo page init flags page used(fg) free_frag list free list full_frag list next segment id full inodes free inodes
4202 2304 1664 0x0000 38 len<1> 0x00000000:0x0096 0x00000000:0x0096 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 3 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 len<1> 0x00000002:0x0000 0x00000002:0x0000
extend page range file segment id state list
0(0x0096) 0-63 0x0000000000000000 0x00000002 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000
1(0x00BE) 64-127 0x0000000000000002 0x00000004 0xFFFFFFFF:0x0000 0x00000000:0x00E6
2(0x00E6) 128-191 0x0000000000000002 0x00000004 0x00000000:0x00BE 0x00000000:0x010E
3(0x010E) 192-255 0x0000000000000002 0x00000004 0x00000000:0x00E6 0x00000000:0x0136
4(0x0136) 256-319 0x0000000000000002 0x00000004 0x00000000:0x010E 0x00000000:0x015E
5(0x015E) 320-383 0x0000000000000002 0x00000004 0x00000000:0x0136 0x00000000:0x0186
6(0x0186) 384-447 0x0000000000000002 0x00000004 0x00000000:0x015E 0x00000000:0x01AE
7(0x01AE) 448-511 0x0000000000000002 0x00000004 0x00000000:0x0186 0x00000000:0x01D6
8(0x01D6) 512-575 0x0000000000000002 0x00000004 0x00000000:0x01AE 0x00000000:0x01FE
9(0x01FE) 576-639 0x0000000000000002 0x00000004 0x00000000:0x01D6 0x00000000:0x0226
10(0x0226) 640-703 0x0000000000000002 0x00000004 0x00000000:0x01FE 0x00000000:0x024E
11(0x024E) 704-767 0x0000000000000002 0x00000004 0x00000000:0x0226 0x00000000:0x0276
12(0x0276) 768-831 0x0000000000000002 0x00000004 0x00000000:0x024E 0x00000000:0x029E
13(0x029E) 832-895 0x0000000000000002 0x00000004 0x00000000:0x0276 0x00000000:0x02C6
14(0x02C6) 896-959 0x0000000000000002 0x00000004 0x00000000:0x029E 0x00000000:0x02EE
15(0x02EE) 960-1023 0x0000000000000002 0x00000004 0x00000000:0x02C6 0x00000000:0x0316
16(0x0316) 1024-1087 0x0000000000000002 0x00000004 0x00000000:0x02EE 0x00000000:0x033E
17(0x033E) 1088-1151 0x0000000000000002 0x00000004 0x00000000:0x0316 0x00000000:0x0366
18(0x0366) 1152-1215 0x0000000000000002 0x00000004 0x00000000:0x033E 0x00000000:0x038E
19(0x038E) 1216-1279 0x0000000000000002 0x00000004 0x00000000:0x0366 0x00000000:0x03B6
20(0x03B6) 1280-1343 0x0000000000000002 0x00000004 0x00000000:0x038E 0x00000000:0x03DE
21(0x03DE) 1344-1407 0x0000000000000002 0x00000004 0x00000000:0x03B6 0x00000000:0x0406
22(0x0406) 1408-1471 0x0000000000000002 0x00000004 0x00000000:0x03DE 0x00000000:0x042E
23(0x042E) 1472-1535 0x0000000000000002 0x00000004 0x00000000:0x0406 0x00000000:0x0456
24(0x0456) 1536-1599 0x0000000000000002 0x00000004 0x00000000:0x042E 0xFFFFFFFF:0x0000
25(0x047E) 1600-1663 0x0000000000000002 0x00000004 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000
This command will show the file segment inode page information
innoisp inode -f db.ibd
==========PAGE 2 OFFSET 0x8000==========
page list
0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000
file segment id used(nf) free list not_full list full list fragment array
0x00000032:1 0 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 3 36 37 (page allocate)
0x000000F2:2 36 len<0> 0xFFFFFFFF:0x0000 0xFFFFFFFF:0x0000 len<1> 0x00000000:0x047E 0x00000000:0x047E len<24> 0x00000000:0x00BE 0x00000000:0x0456 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 (extend allocate)
Search ibd file with specified primary key value.
innoisp search -f db.ibd -k 2
File db.ibd has 2304 page(s)
Searching for file segment inode page ...
File segment inode page found at index 2
Searching for root index page ...
Root index page found at index 3, 3 inode used
Loading root index page at index 3
Search directory slots of page 3 level 2, directory slots count 2
Search directory slots of page 37 level 1, directory slots count 251
Search directory slots of page 633 level 0, directory slots count 76
Recorder found, page <633> header offset <0x0078> data offset<0x007D>
Statistics: Page searched <3> index page searched <2> search times <19> cost <1 ms>
Search the ibd file through index non-leaf page (done 2018/05/10)
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