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IDS Forum

disk consumption analysis

Posted By: FRANK
Date: Friday, 24 April 2015, at 12:45 p.m.

Folks,

IDS12.10 FC4, RHEL.

I have Two tables ( see below for details).

I copied three set of information for each,
--schema definition ( ignored index part)
-- part of output oncheck -pt
-- part of output of oncheck -pd

The two tables consumed similar size of data pages, but one can hold
about 9 millions of rows, another can only hold about 4 millions of rows.

The row sizes are similar too ( close lengths, 704 vs. 744). page size is
2K.

Any comments?

Thanks
Frank

=========table ds_archive18

{ TABLE "informix".ds_archive18 row size = 704 number of columns = 11 index
size = 295 }
create table "informix".ds_archive18
(

dataset_name varchar(255,44) not null ,

archive_site char(10) not null ,

path_name varchar(250,50),

archive_dt datetime year to second,

update_dt datetime year to second,

hsm_fs char(10),

check_sum varchar(128),

tape_name char(16),

tape_block integer,

tape_offset integer,

checksum_dt datetime year to second
) in dbdw04 extent size 4096 next size 4096 lock mode row;

[informix@walter info]$ oncheck -pt noaa:ds_archive18

TBLspace Report for noaa:informix.ds_archive18

Physical Address 53:3373732

Creation date 11/06/2013 17:20:43

TBLspace Flags 902 Row Locking

TBLspace contains VARCHARS

TBLspace use 4 bit bit-maps

Maximum row size 704

Number of special columns 3

Number of keys 0

Number of extents 16

Current serial value 1

Current SERIAL8 value 1

Current BIGSERIAL value 1

Current REFID value 1

Pagesize (k) 2

First extent size 2048

Next extent size 131072

Number of pages allocated 1310720

Number of pages used 1292403

Number of data pages 1292081

Number of rows 9044549

Partition partnum 30408942

Partition lockid 30408942

[informix@walter info]$ oncheck -pd noaa:ds_archive18 | more

TBLspace data check for noaa:informix.ds_archive18
page_type rowid length fwd_ptr
HOME 101 197 0

0: 23 50 52 44 2e 53 50 50 52 4f 44 2e 45 44 52 31 #PRD.SPPROD.EDR1

16: 34 4e 2e 53 31 31 30 36 30 30 36 2e 45 31 31 30 4N.S1106006.E110

32: 36 30 31 32 4e 47 44 43 20 20 20 20 20 20 22 2f 6012NGDC "/

48: 63 6c 61 73 73 5f 64 69 72 73 2f 61 72 63 68 73 class_dirs/archs

64: 6d 30 32 2f 61 72 63 68 69 76 65 31 38 2f 30 30 m02/archive18/00

80: 31 c7 14 b 3 9 12 20 19 0 0 0 0 0 0 0 1G..... ........

96: 0 41 52 43 48 53 4d 30 32 20 20 20 64 63 39 31 .ARCHSM02 dc91
112: 35 36 31 31 34 63 61 36 63 36 38 63 65 31 39 37 56114ca6c68ce197
128: 65 63 38 30 64 63 39 64 39 64 63 66 30 30 36 39 ec80dc9d9dcf0069
144: 34 33 20 20 20 20 20 20 20 20 20 20 0 7 c a8 43 ...(
160: 0 2 cf 80 c7 14 c c 15 17 2b 1f 0 0 20 0 ..O.G.....+... .
176: 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 ................
192: d0 0 25 0 16 P...............
page_type rowid length fwd_ptr
HOME 102 197 0

0: 23 50 52 44 2e 53 50 50 52 4f 44 2e 45 44 52 31 #PRD.SPPROD.EDR1

16: 34 53 2e 53 31 31 30 36 30 30 36 2e 45 31 31 30 4S.S1106006.E110

32: 36 30 31 32 4e 47 44 43 20 20 20 20 20 20 22 2f 6012NGDC "/

48: 63 6c 61 73 73 5f 64 69 72 73 2f 61 72 63 68 73 class_dirs/archs

64: 6d 30 32 2f 61 72 63 68 69 76 65 31 38 2f 30 30 m02/archive18/00

80: 32 c7 14 b 3 9 12 20 1e 0 0 0 0 0 0 0 2G..... ........

96: 0 41 52 43 48 53 4d 30 32 20 20 20 66 37 62 31 .ARCHSM02 f7b1
112: 62 31 38 30 63 34 34 36 64 37 35 39 35 38 66 35 b180c446d75958f5
128: 39 62 66 63 39 62 62 30 65 65 64 39 30 30 36 39 9bfc9bb0eed90069
144: 34 33 20 20 20 20 20 20 20 20 20 20 0 7 c f4 43 ...t
160: 0 5 51 80 c7 14 c c 15 17 2b 20 0 0 20 0 ..Q.G.....+ .. .
176: 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 ................
192: d0 0 25 0 16 P...............
page_type rowid length fwd_ptr
HOME 103 197 0

0: 23 50 52 44 2e 53 50 50 52 4f 44 2e 45 44 52 31 #PRD.SPPROD.EDR1

16: 35 4e 2e 53 31 31 30 36 30 30 36 2e 45 31 31 30 5N.S1106006.E110

32: 36 30 31 32 4e 47 44 43 20 20 20 20 20 20 22 2f 6012NGDC "/
--More--

=========table archive_0006
{ TABLE "informix".archive_0006 row size = 744 number of columns = 15 index
size = 78 }
create table "informix".archive_0006
(

uuid char(36) not null ,

dataset_name varchar(255,12) not null ,

file_name varchar(255,49) not null ,

path_name char(9) not null ,

active char(1) not null ,

datatype_name char(10) not null ,

archive_dt datetime year to second not null ,

update_dt datetime year to second,

file_size_bytes bigint not null ,

md5_checksum char(32),

sha2_checksum char(96),

checksum_dt datetime year to second,

tape_name integer,

tape_position integer,

tape_offset bigint
) in dbdata09 extent size 4096 next size 4096 lock mode row;

[informix@walter ~]$ oncheck -pt noaa:archive_0006

TBLspace Report for noaa:informix.archive_0006

Physical Address 38:187415

Creation date 08/19/2014 14:53:32

TBLspace Flags 902 Row Locking

TBLspace contains VARCHARS

TBLspace use 4 bit bit-maps

Maximum row size 744

Number of special columns 2

Number of keys 0

Number of extents 46

Current serial value 1

Current SERIAL8 value 1

Current BIGSERIAL value 1

Current REFID value 1

Pagesize (k) 2

First extent size 2048

Next extent size 131072

Number of pages allocated 1310720

Number of pages used 1193119

Number of data pages 1192823

Number of rows 4389102

Partition partnum 23068967

Partition lockid 23068967

[informix@walter ~]$ oncheck -pd noaa:archive_0006 | more

TBLspace data check for noaa:informix.archive_0006
page_type rowid length fwd_ptr
HOME 101 355 0

0: 63 36 62 61 30 62 31 34 2d 38 66 35 39 2d 31 31 c6ba0b14-8f59-11

16: 65 33 2d 61 39 63 62 2d 35 63 66 33 66 63 62 38 e3-a9cb-5cf3fcb8

32: 64 38 37 38 2a 4e 53 53 2e 41 4d 41 58 2e 4e 4e d878*NSS.AMAX.NN

48: 2e 44 31 34 30 33 37 2e 53 31 33 34 39 2e 45 31 .D14037.S1349.E1

64: 35 34 34 2e 42 34 34 39 31 33 31 34 2e 47 43 4f 544.B4491314.GCO

80: 4e 53 53 2e 41 4d 41 58 2e 4e 4e 2e 44 31 34 30 NSS.AMAX.NN.D140

96: 33 37 2e 53 31 33 34 39 2e 45 31 35 34 34 2e 42 37.S1349.E1544.B
112: 34 34 39 31 33 31 34 2e 47 43 5f 63 36 62 61 30 4491314.GC_c6ba0
128: 62 31 34 2d 38 66 35 39 2d 31 31 65 33 2d 61 39 b14-8f59-11e3-a9
144: 63 62 2d 35 63 66 33 66 63 62 38 64 38 37 38 2f cb-5cf3fcb8d878/
160: 32 30 31 34 30 32 30 36 59 41 54 4f 56 5f 41 4d 20140206YATOV_AM
176: 53 55 41 c7 14 e 2 6 12 d 8 0 0 0 0 0 SUAG............
192: 0 0 0 0 0 0 0 0 21 a2 0 62 37 35 38 32 ........!".b7582
208: 63 30 66 38 62 35 65 30 61 65 38 63 63 38 66 65 c0f8b5e0ae8cc8fe
224: 32 31 62 33 30 37 32 32 63 39 35 37 65 30 39 34 21b30722c957e094
240: 32 61 62 38 38 32 31 37 65 38 36 32 65 34 39 39 2ab88217e862e499
256: 33 63 64 33 64 63 35 34 38 33 33 31 61 30 35 30 3cd3dc548331a050
272: 62 37 35 62 39 39 35 34 62 37 33 38 31 63 64 66 b75b9954b7381cdf
288: 64 62 36 62 62 64 33 38 32 38 33 63 64 31 34 31 db6bbd38283cd141
304: 65 31 33 64 62 31 36 38 63 65 64 65 66 32 66 61 e13db168cedef2fa
320: 61 38 37 65 65 36 32 33 34 34 37 c7 14 e c 10 a87ee623447G....
336: 6 3b e 0 89 f1 48 0 0 1 a7 0 0 0 0 48 .;...qH...'....H
352: 1c 65 40 .e@.............
page_type rowid length fwd_ptr
HOME 102 355 0

0: 63 36 66 34 37 65 30 32 2d 38 66 35 39 2d 31 31 c6f47e02-8f59-11

16: 65 33 2d 61 39 63 62 2d 35 63 66 33 66 63 62 38 e3-a9cb-5cf3fcb8

32: 64 38 37 38 2a 4e 53 53 2e 41 4d 41 58 2e 4e 4e d878*NSS.AMAX.NN

48: 2e 44 31 34 30 33 37 2e 53 31 35 33 38 2e 45 31 .D14037.S1538.E1

64: 37 31 36 2e 42 34 34 39 31 34 31 35 2e 47 43 4f 716.B4491415.GCO

80: 4e 53 53 2e 41 4d 41 58 2e 4e 4e 2e 44 31 34 30 NSS.AMAX.NN.D140

96: 33 37 2e 53 31 35 33 38 2e 45 31 37 31 36 2e 42 37.S1538.E1716.B
112: 34 34 39 31 34 31 35 2e 47 43 5f 63 36 66 34 37 4491415.GC_c6f47
128: 65 30 32 2d 38 66 35 39 2d 31 31 65 33 2d 61 39 e02-8f59-11e3-a9
144: 63 62 2d 35 63 66 33 66 63 62 38 64 38 37 38 2f cb-5cf3fcb8d878/
160: 32 30 31 34 30 32 30 36 59 41 54 4f 56 5f 41 4d 20140206YATOV_AM
176: 53 55 41 c7 14 e 2 6 12 d 8 0 0 0 0 0 SUAG............
192: 0 0 0 0 0 0 0 0 1c a2 0 31 61 32 61 64 .........".1a2ad
208: 37 39 62 30 37 34 64 34 37 65 64 63 32 39 38 31 79b074d47edc2981
224: 37 33 62 63 65 39 33 63 33 66 31 66 39 30 62 34 73bce93c3f1f90b4
240: 35 63 35 30 35 37 32 37 39 65 30 36 37 39 34 65 5c5057279e06794e
256: 39 66 66 62 30 61 63 34 36 32 66 64 34 38 39 66 9ffb0ac462fd489f
272: 62 39 30 64 61 62 38 37 33 35 32 63 39 65 35 33 b90dab87352c9e53
288: 38 30 66 33 35 37 36 34 32 66 62 30 66 34 62 35 80f357642fb0f4b5
304: 31 30 35 34 64 38 33 37 63 35 31 31 65 39 38 63 1054d837c511e98c
320: 66 38 31 31 30 62 34 33 65 38 62 c7 14 e c 10 f8110b43e8bG....
336: 6 3b d 0 89 f1 48 0 0 1 a7 0 0 0 0 6e .;...qH...'....n
352: 52 91 0 R...............
page_type rowid length fwd_ptr
HOME 103 355 0

0: 30 38 65 34 39 63 39 61 2d 38 66 34 39 2d 31 31 08e49c9a-8f49-11

16: 65 33 2d 62 61 31 38 2d 35 63 66 33 66 63 62 38 e3-ba18-5cf3fcb8

32: 64 38 37 38 2a 4e 53 53 2e 41 4d 41 58 2e 4e 4c d878*NSS.AMAX.NL

48: 2e 44 31 34 30 33 37 2e 53 30 38 35 36 2e 45 31 .D14037.S0856.E1

--001a1133bfb4f6ffb705147b1f25

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