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IDS Forum

Re: disk consumption analysis

Posted By: John Miller iii
Date: Friday, 24 April 2015, at 8:08 p.m.

In Response To: disk consumption analysis (FRANK)

If you are using vachars with fixed length data then
=0D<= DIV>things will not be that optimal for storage. varchars
=0Dassume random length data to be optimal in storage.=0D
<= /DIV>=0D
One think you should try is setting MAX=5FFILL=5FDATA=5FPAGES =
=0D
in the onconfig. This will attempt to be more spa= ce efficient.
=0D
=0D
=0D
See ever= yone at IIUG. -:)
=0D
=0D
=0D
=0D
=0D
John F. Miller III
=0D
STSM, Lead &nb= sp;Architect
=0D
[1]miller3@us.= ibm.com
=0D
503-747-1366
=0D
IBM Informix Dynamic Ser= ver (IDS) =0D
-----ids-bounce= s@iiug.org wrote: -----
>To: ids@iiug.org
>From: "FR= ANK"
>Sent by: ids-bounces@iiug.org
>Date: 04/24/2015 09:47AM<= BR>>Subject: disk consumption analysis
[35013]
>
>
>Fo= lks,
>
>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)
>-- par= t of output oncheck -pt
>-- part of output of oncheck -pd
>>The two tables consumed similar size of data pages, but one can
hold<= BR>>
>about 9 millions of rows, another can only hold about 4 mill= ions of
>rows.
>
>The row sizes are similar too ( close = lengths, 704 vs. 744). page
>size is
>2K.
>
>Any = comments?
>
>Thanks
>Frank
>
>=3D=3D=3D=3D= =3D=3D=3D=3D=3Dtable ds=5Farchive18
>
>{ TABLE "informix".ds= =5Farchive18 row size =3D 704 number of
columns =3D 11
>index
>= ;size =3D 295 }
>create table "informix".ds=5Farchive18
>( >
>dataset=5Fname varchar(255,44) not null ,
>
>arc= hive=5Fsite char(10) not null ,
>
>path=5Fname varchar(250,50)= ,
>
>archive=5Fdt datetime year to second,
>
>upd= ate=5Fdt datetime year to second,
>
>hsm=5Ffs char(10),
&g= t;
>check=5Fsum varchar(128),
>
>tape=5Fname char(16), <= BR>>
>tape=5Fblock integer,
>
>tape=5Foffset integer,=
>
>checksum=5Fdt datetime year to second
>) in dbdw04 = extent size 4096 next size 4096 lock mode row;
>
>[informix@wa= lter info]$ oncheck -pt noaa:ds=5Farchive18
>
>TBLspace Report= for noaa:informix.ds=5Farchive18
>
>Physical Address 53:33737= 32
>
>Creation date 11/06/2013 17:20:43
>
>TBLspa= ce Flags 902 Row Locking
>
>TBLspace contains VARCHARS
>= ;
>TBLspace use 4 bit bit-maps
>
>Maximum row size 704 <= BR>>
>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
>
>Nu= mber of pages used 1292403
>
>Number of data pages 1292081
>
>Number of rows 9044549
>
>Partition partnum 30408= 942
>
>Partition lockid 30408942
>
>[informix@wal= ter info]$ oncheck -pd noaa:ds=5Farchive18 | more
>
>TBLspace = data check for noaa:informix.ds=5Farchive18
>page=5Ftype rowid lengt= h fwd=5Fptr
>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
>
>
&g= t;32: 36 30 31 32 4e 47 44 43 20 20 20 20 20 20 22 2f 6012NGDC "/
><= BR>>48: 63 6c 61 73 73 5f 64 69 72 73 2f 61 72 63 68 73
class=5Fdirs/arc= hs
>
>
>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 3= 6 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=5Ftype rowid length fwd=5Fptr
>HOME 102 197 0
>
&= gt;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 7= 2 63 68 73
class=5Fdirs/archs
>
>
>64: 6d 30 32 2f 61 72 = 63 68 69 76 65 31 38 2f 30 30
m02/archive18/00
>
>
>80: 3= 2 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: 6= 2 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=5Ftype rowid length fwd=5Fptr
>H= OME 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--
>
&= gt;=3D=3D=3D=3D=3D=3D=3D=3D=3Dtable archive=5F0006
>{ TABLE "informi= x".archive=5F0006 row size =3D 744 number of
columns =3D 15
>index >size =3D 78 }
>create table "informix".archive=5F0006
>= (
>
>uuid char(36) not null ,
>
>dataset=5Fname v= archar(255,12) not null ,
>
>file=5Fname varchar(255,49) not n= ull ,
>
>path=5Fname char(9) not null ,
>
>active= char(1) not null ,
>
>datatype=5Fname char(10) not null ,
>
>archive=5Fdt datetime year to second not null ,
>
&g= t;update=5Fdt datetime year to second,
>
>file=5Fsize=5Fbytes = bigint not null ,
>
>md5=5Fchecksum char(32),
>
>= sha2=5Fchecksum char(96),
>
>checksum=5Fdt datetime year to se= cond,
>
>tape=5Fname integer,
>
>tape=5Fposition = integer,
>
>tape=5Foffset bigint
>) in dbdata09 extent = size 4096 next size 4096 lock mode row;
>
>[informix@walter ~]= $ oncheck -pt noaa:archive=5F0006
>
>TBLspace Report for noaa:= informix.archive=5F0006
>
>Physical Address 38:187415
>=
>Creation date 08/19/2014 14:53:32
>
>TBLspace Flags 90= 2 Row Locking
>
>TBLspace contains VARCHARS
>
>TB= Lspace 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
><= BR>>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 pag= es used 1193119
>
>Number of data pages 1192823
>
&g= t;Number of rows 4389102
>
>Partition partnum 23068967
>= ;
>Partition lockid 23068967
>
>[informix@walter ~]$ onc= heck -pd noaa:archive=5F0006 | more
>
>TBLspace data check for= noaa:informix.archive=5F0006
>page=5Ftype rowid length fwd=5Fptr >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 3= 5 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 5=
44.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=5Fc6ba0
>
&g= t;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-5cf3fcb=
8d878/
>
>160: 32 30 31 34 30 32 30 36 59 41 54 4f 56 5f 41 4d =
20140206YATOV=5FAM
>
>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 c=
0f8b5e0ae8cc8fe
>
>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 3= 5 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 a87ee623= 447G....
>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=5Ftype rowid length f= wd=5Fptr
>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
>
>
>3= 2: 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 3= 7 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=5Fc6f47
>
>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 5= 6 5f 41 4d
20140206YATOV=5FAM
>
>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 6= 6 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
><= BR>>288: 38 30 66 33 35 37 36 34 32 66 62 30 66 34 62 35
80f357642fb0f4b= 5
>
>304: 31 30 35 34 64 38 33 37 63 35 31 31 65 39 38 63 1054d=
837c511e98c
>
>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=5Ftype rowi= d length fwd=5Fptr
>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 3= 3 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 <= BR>>
>
>****************************************************=
*****************
>**********
> Forum Note: Use "Reply" = to post a response in the discussion
forum.
>
References
1. 3D"mailto:miller3@us.ibm.com"

Messages In This Thread

disk consumption analysis
FRANK -- Friday, 24 April 2015, at 12:45 p.m.
- Re: disk consumption analysis
  Art Kagel -- Friday, 24 April 2015, at 12:59 p.m.
  - Re: disk consumption analysis
    FRANK -- Friday, 24 April 2015, at 1:49 p.m.
    - Re: disk consumption analysis
      Art Kagel -- Friday, 24 April 2015, at 1:56 p.m.
- Re: disk consumption analysis
  John Miller iii -- Friday, 24 April 2015, at 8:08 p.m.

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