Bitmap monochrome (not greyscale)

Sorry for this question - Illustrator CS6 can export a bitmap monochrome file (not greyscale)?
I have to export this old format file for a client and i have to understand it's possible.
Many thanks.

You can use an 8-bit indexed format to export...:
File>Save For Web and Devices.
GIF: 2 Colors. Select
or
PNG-8: 2 Colors
Select desired dither pattern.
Then open in a raster image program to convert to 1-bit TIFF if needed.
Something is not antequated just because Adobe poorly supports it. 1-bit diffusion dither makes for a nice texture.
JET

Similar Messages

Why do I get error message "Prop Bitmap DLL not loaded" when I try to print Adobe documents?

When trying to print either images or text from Adobe format I receive the above error when using Mozilla firefox as my browser. i f I use Internet Explorer as browser I do not have any problems printing from Adobe.

I recently updated to Firefox 9 and every time I try to print something in draft form from an email (like a confirmation of an order I placed on a website) I get the Prop Bitmap DLL Not Loaded message. I never got that message with the 3.6 version of Firefox so it is very annoying and starting to irritate me. I print most of my things in draft form to save using up the ink in the cartridge. I have a Dell 924 printer. I uninstalled the printer and then reinstalled it but that didn't help the problem. I'm not computer savvy so I don't know how to fix the problem.

"Prop bitmap dll not loaded" message when printing PDF

Getting "Prop bitmap dll not loaded" message when printing PDF. Message started occuring after Adobe Reader upgrade to version 11.
Windows XP
Lexmark P6250 printer
Firefox v17.0.1
Adobe Reader v11.0.0
Thanks;
Paul

Can you try to install the latest Lexmark printer driver (http://support.lexmark.com/index?segment=SUPPORT&userlocale=EN_US&locale=en&productCode=LE XMARK_P6250&page=product).
If that does not help, see this thread http://social.technet.microsoft.com/forums/en/officesetupdeploylegacy/thread/6bdf9d5d-1b14 -4789-b6ee-3aff66889f42

Prop Bitmap DLL not loaded?

What is this? Some things print others not so much. I have uninstalled and reinstalled my Dell printer and still get this message. Why?

Hello, I hope you are there. I had to go last week.
My printer name and number is a Dell 922.
What file and where do I find this file and what do I do with this file when I find it. Please help. There are some pages that I need to copy and I can not.
From: " kglad "
Sent: Sunday, March 31, 2013 11:53:21 AM
Subject: Prop Bitmap DLL not loaded?
Re: Prop Bitmap DLL not loaded?
created by kglad in Downloading, Installing, Setting Up - View the full discussion
what's your printer model name/number?
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Why bitmap index not working?

I have a table containing 4.2M rows and 16 distinct fs_type_code. So I created a bitmap index ntr_fs_type_code_ind on the column. Then I run the query:
update /*+ INDEX_COMBINE(NTR_FS_TYPE_CODE_IND) */ ntr_CORPALL_20050801 d
set eqt_basket_id = NULL, index_weight = NULL
where
fs_type_code in ('EQGR','EQVG','EQDL')
and eqt_basket_id = equity_symbol
and index_weight = 0;
I clearly tell optimizer to use the bitmap index. But it turns out the optimizer ignore the index and still use full table scan.
When I created regular b-tree index, the same query (without hint) use index scan.
Can anybody tell me why the bitmap index not working here?
Thanks,

<quote>I clearly tell optimizer to use the bitmap index</quote>
You are clearly not doing it right (see bellow). But anyway
1. For frequently modified tables (OLTP type application) you may want to rethink the applicability of bitmap indexes
low cardinality in itself is not enough justification for using bitmap indexes.
2. Your update statement may modify a minority, a majority, or anything in between of the total number of
rows in your table here is no one universal access method which is always better
(if there were one they wouldnt have bothered with coding the rest).
In short, index access is not always the better way.
3. Dont rush into hinting (because that optimizer is such a lousy piece of software)
and if you do, make sure you do it correctly and for the right reasons.
flip@FLOP> create table t as select * from all_objects;
Table created.
flip@FLOP> insert into t select * from t;
30043 rows created.
flip@FLOP> insert into t select * from t;
60086 rows created.
flip@FLOP> insert into t select * from t;
120172 rows created.
flip@FLOP> insert into t select * from t;
240344 rows created.
flip@FLOP> create bitmap index tx on t (object_type);
Index created.
flip@FLOP> exec dbms_stats.gather_table_stats(user,'T',method_opt=>'for all indexed columns',cascade=>true)
PL/SQL procedure successfully completed.
flip@FLOP> select object_type,count(*) from t group by rollup(object_type);
OBJECT_TYPE          COUNT(*)
CONSUMER GROUP             32
DIRECTORY                  32
EVALUATION CONTEXT         16
FUNCTION                 1648
INDEX                   23152
INDEX PARTITION          2048
INDEXTYPE                 128
JAVA CLASS             163024
JAVA RESOURCE            3120
LIBRARY                   224
LOB                        16
MATERIALIZED VIEW          32
OPERATOR                  464
PACKAGE                  5488
PACKAGE BODY               32
PROCEDURE                 640
SEQUENCE                  144
SYNONYM                202512
TABLE                   18816
TABLE PARTITION           880
TRIGGER                  4768
TYPE                    10640
TYPE BODY                  16
VIEW                    42816
                       480688
flip@FLOP> set autotrace on explain
update few rows CBO goes with the index no hinting
flip@FLOP> update t d set object_id=object_id-1 where object_type in ('INDEX','PACKAGE','PACKAGE BODY','TABLE');
47488 rows updated.
Elapsed: 00:00:09.02
Execution Plan
   0      UPDATE STATEMENT Optimizer=CHOOSE (Cost=536 Card=47488 Bytes
          =1044736)
   1    0   UPDATE OF 'T'
   2    1     INLIST ITERATOR
   3    2       BITMAP CONVERSION (TO ROWIDS)
   4    3         BITMAP INDEX (SINGLE VALUE) OF 'TX'
update lots of rows CBO goes with the ft no hinting
flip@FLOP> update t d set object_id=object_id-1 where object_type in ('JAVA CLASS','SYNONYM');
365536 rows updated.
Elapsed: 00:00:25.04
Execution Plan
   0      UPDATE STATEMENT Optimizer=CHOOSE (Cost=638 Card=365536 Byte
          s=8041792)
   1    0   UPDATE OF 'T'
   2    1     TABLE ACCESS (FULL) OF 'T' (Cost=638 Card=365536 Bytes=8
          041792)
update lots of rows wrong hint syntax CBO goes with the ft
flip@FLOP> update /*+ index_combine(tx) */ t d set object_id=object_id-1 where object_type in ('JAVA CLASS','SYNONYM');
365536 rows updated.
Elapsed: 00:00:21.00
Execution Plan
   0      UPDATE STATEMENT Optimizer=CHOOSE (Cost=638 Card=365536 Byte
          s=8041792)
   1    0   UPDATE OF 'T'
   2    1     TABLE ACCESS (FULL) OF 'T' (Cost=638 Card=365536 Bytes=8
          041792)
update lots of rows correct hint syntax CBO goes with the index but was it better than the ft?
flip@FLOP> update /*+ index_combine(d tx) */ t d set object_id=object_id-1 where object_type in ('JAVA CLASS','SYNONYM')
365536 rows updated.
Elapsed: 00:00:25.01
Execution Plan
   0      UPDATE STATEMENT Optimizer=CHOOSE (Cost=1665 Card=365536 Byt
          es=8041792)
   1    0   UPDATE OF 'T'
   2    1     INLIST ITERATOR
   3    2       BITMAP CONVERSION (TO ROWIDS)
   4    3         BITMAP INDEX (SINGLE VALUE) OF 'TX'
flip@FLOP>

What is "Prop Bitmap DLL not loaded" mean?

What does the message "Prop Bitmap DLL not loaded mean"?

What are you doing when getting this message?

Bitmap Index Not Used in PROD and used in DEV

I am in a situation where in in DEV Bitmap Index is used and in PROD bitmap Index is not used. I checked the count, in PROD I have 10 mil rows and in DEV I have 16 mil rows. Optimizer is CHOOSE and also when I tried to force to use index in PROD, I got higher cost.
Any suggestions why Index is not used in PROD as opposed to DEV

As other says, no guarantee that the same query with same setting OS, ORACLE to produce the same execution plan. Also, as Justin said, dont every take cost as your tuning parameter, pay attention to response time, also, number of logical reads and physical reads. What are the wait events during?
For an index, most important factors are, blevel, clustering_factor, number of distinct values. Clustering actor make a lot of difference. You said, when you force index to use, your performance has gained. If so, why not, why the HINTS there in place? Go ahed and use it, but, after all the R&D. Are the Optimizer* paraemters same on the both databases?
If possible, post the execution plan of the query, with HINT and without HINT as well.
Jaffar

Bitmap index not used

I exported/imported a schema. Same Oracle version (10.2.0.3), same server (HP-UX/Itanium).
I have a select that doesn't use a bitmap index in the new database. The same bitmap index is used in the old database.
I run analyze, tried hinting (index, index_combine) nothing helped, I could not force the optimizer to use the index in the new database. Any suggestion?
Thanks

Hi Andras
I would strongly recommend taking a 10053 trace and see what the CBO is up to.
Cheers
Richard Foote
http://richardfoote.wordpress.com/

Bitmap image not showing up on windows title bar in windows server 2012 std

I have an application written in VC++ (MFC). Its a legacy app. Recently we were asked to check its compatibility with windows server 2012 std edition. We found some issues and one of those is as follows:
1) We display a BITMAP image using Windows.StretchBlt() function on the titlebar of the app. It shows up properly in windows server 2003, win XP and win 7. But doesn't show up in windows server 2012. I am assuming its a windows paint issue because button
is there on titlebar as I can click on it and see the expected behavior. But its just not visible.
Here is some technical workflow:
-> This function get called to paint the framwnd-
        CMainFrame::OnNcPaint()
             CMDIFrameWnd::OnNcPaint();
             // here we have code to paint the bitmap
Could anyone here please tell me why the same code is behaving differently in win server 2012? Also if there is any solution for this.

This forum is more of a general purpose forum about Windows Server. You question is more closely related to programming issues. You would be better served to post in a .NET development forum.
.:|:.:|:. tim

Bitmap is not exporting to excel file

Any kind help appreciated.
I have added a bitmap image in my workbook but when i am exporting it into excel or html ,only text part of the title is exporting into excel file .
The bitmap is only visible in discoverer workbook ,after exporting to excel or html, it disappears,
i am using oracle 9i discoverer version 9.0.2.0
thanks,

Hi,
Bitmaps in the workbook titles are not exported. I guess it was just too difficult to do when they added bitmaps into the titles.
Rod West

[solved] urxvt terminal: Bitmap fonts not working

Hello
I can't get bitmap fonts to work with urxtv (aka rxvt-unicode).
Here's output of fc-list : file -command
$ fc-list : file
Fontconfig warning: "/etc/fonts/conf.d/53-monospace-lcd-filter.conf", line 10: Having multiple values in <test> isn't supported and may not work as expected
/usr/share/fonts/TTF/DejaVuSerif-BoldItalic.ttf:
/usr/share/fonts/Type1/a010015l.pfb:
/usr/share/fonts/TTF/comic.ttf:
/usr/share/fonts/Type1/n019043l.pfb:
/usr/share/fonts/TTF/DejaVuSans-ExtraLight.ttf:
/usr/share/fonts/Type1/n019044l.pfb:
/usr/share/fonts/TTF/DroidSansArmenian.ttf:
/usr/share/fonts/TTF/times.ttf:
/usr/share/fonts/TTF/DroidSansEthiopic-Regular.ttf:
/usr/share/fonts/TTF/DejaVuSerif-Bold.ttf:
/usr/share/fonts/Type1/n022003l.pfb:
/usr/share/fonts/Type1/n022004l.pfb:
/usr/share/fonts/TTF/arial.ttf:
/usr/share/fonts/TTF/DroidSansHebrew-Regular.ttf:
/usr/share/fonts/Type1/n021023l.pfb:
/usr/share/fonts/Type1/n021024l.pfb:
/usr/share/fonts/TTF/ariblk.ttf:
/usr/share/fonts/Type1/n019023l.pfb:
/usr/share/fonts/TTF/DroidSansFallbackLegacy.ttf:
/usr/share/fonts/Type1/n022023l.pfb:
/usr/share/fonts/TTF/verdana.ttf:
/usr/share/fonts/Type1/n022024l.pfb:
/usr/share/fonts/Type1/n019024l.pfb:
/usr/share/fonts/TTF/TerminusBold.ttf:
/usr/share/fonts/cantarell/Cantarell-Bold.otf:
/usr/share/fonts/TTF/DejaVuSansCondensed.ttf:
/usr/share/fonts/TTF/timesi.ttf:
/usr/share/fonts/TTF/DroidKufi-Bold.ttf:
/usr/share/fonts/TTF/VeraMoBI.ttf:
/usr/share/fonts/TTF/DejaVuSansMono-BoldOblique.ttf:
/usr/share/fonts/TTF/DroidKufi-Regular.ttf:
/usr/share/fonts/Type1/n021003l.pfb:
/usr/share/fonts/Type1/n021004l.pfb:
/usr/share/fonts/TTF/andalemo.ttf:
/usr/share/fonts/TTF/DroidSansHebrew-Bold.ttf:
/usr/share/fonts/TTF/Ubuntu-B.ttf:
/usr/share/fonts/TTF/Ubuntu-R.ttf:
/usr/share/fonts/Type1/n019003l.pfb:
/usr/share/fonts/TTF/Ubuntu-C.ttf:
/usr/share/fonts/TTF/VeraMoBd.ttf:
/usr/share/fonts/TTF/TerminusMediumItalic.ttf:
/usr/share/fonts/TTF/DejaVuSerifCondensed-BoldItalic.ttf:
/usr/share/fonts/TTF/DejaVuSerif-Italic.ttf:
/usr/share/fonts/Type1/n019004l.pfb:
/usr/share/fonts/TTF/VeraMoIt.ttf:
/usr/share/fonts/TTF/DejaVuSansMono.ttf:
/usr/share/fonts/TTF/DroidSansGeorgian.ttf:
/usr/share/fonts/TTF/DroidSansEthiopic-Bold.ttf:
/usr/share/fonts/TTF/Ubuntu-L.ttf:
/usr/share/fonts/TTF/DroidSansJapanese.ttf:
/usr/share/fonts/TTF/TerminusMedium.ttf:
/usr/share/fonts/TTF/DejaVuSans-BoldOblique.ttf:
/usr/share/fonts/TTF/VeraMono.ttf:
/usr/share/fonts/TTF/DejaVuSansCondensed-Oblique.ttf:
/usr/share/fonts/TTF/DroidNaskh-Regular.ttf:
/usr/share/fonts/TTF/DejaVuSans.ttf:
/usr/share/fonts/TTF/cour.ttf:
/usr/share/fonts/TTF/georgia.ttf:
/usr/share/fonts/TTF/DejaVuSansCondensed-Bold.ttf:
/usr/share/fonts/TTF/VeraSe.ttf:
/usr/share/fonts/TTF/UbuntuMono-BI.ttf:
/usr/share/fonts/TTF/DroidSerif-BoldItalic.ttf:
/usr/share/fonts/Type1/c059036l.pfb:
/usr/share/fonts/TTF/VeraSeBd.ttf:
/usr/share/fonts/TTF/DroidSans-Bold.ttf:
/usr/share/fonts/Type1/c059033l.pfb:
/usr/share/fonts/TTF/Ubuntu-RI.ttf:
/usr/share/fonts/TTF/DejaVuSansMono-Oblique.ttf:
/usr/share/fonts/cantarell/Cantarell-Regular.otf:
/usr/share/fonts/TTF/VeraBI.ttf:
/usr/share/fonts/TTF/DroidSansTamil-Regular.ttf:
/usr/share/fonts/TTF/VeraIt.ttf:
/usr/share/fonts/TTF/DroidSerif-Regular.ttf:
/usr/share/fonts/TTF/DroidNaskh-Regular-SystemUI.ttf:
/usr/share/fonts/Type1/d050000l.pfb:
/usr/share/fonts/TTF/VeraBd.ttf:
/usr/share/fonts/TTF/DroidSans.ttf:
/usr/share/fonts/TTF/UbuntuMono-RI.ttf:
/usr/share/fonts/Type1/c059016l.pfb:
/usr/share/fonts/Type1/s050000l.pfb:
/usr/share/fonts/TTF/verdanai.ttf:
/usr/share/fonts/TTF/verdanaz.ttf:
/usr/share/fonts/Type1/c059013l.pfb:
/usr/share/fonts/TTF/Ubuntu-BI.ttf:
/usr/share/fonts/TTF/verdanab.ttf:
/usr/share/fonts/TTF/trebucit.ttf:
/usr/share/fonts/TTF/DejaVuSerifCondensed-Italic.ttf:
/usr/share/fonts/TTF/Ubuntu-LI.ttf:
/usr/share/fonts/TTF/DejaVuSans-Bold.ttf:
/usr/share/fonts/TTF/DejaVuSerif.ttf:
/usr/share/fonts/TTF/georgiai.ttf:
/usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf:
/usr/share/fonts/TTF/DroidSansThai.ttf:
/usr/share/fonts/TTF/trebucbd.ttf:
/usr/share/fonts/TTF/DejaVuSerifCondensed.ttf:
/usr/share/fonts/TTF/couri.ttf:
/usr/share/fonts/TTF/georgiab.ttf:
/usr/share/fonts/Type1/b018032l.pfb:
/usr/share/fonts/TTF/DroidNaskh-Bold.ttf:
/usr/share/fonts/TTF/georgiaz.ttf:
/usr/share/fonts/TTF/timesbi.ttf:
/usr/share/fonts/TTF/arialbd.ttf:
/usr/share/fonts/Type1/b018035l.pfb:
/usr/share/fonts/TTF/UbuntuMono-B.ttf:
/usr/share/fonts/TTF/trebucbi.ttf:
/usr/share/fonts/TTF/UbuntuMono-R.ttf:
/usr/share/fonts/TTF/arialbi.ttf:
/usr/share/fonts/TTF/DroidSansArabic.ttf:
/usr/share/fonts/TTF/timesbd.ttf:
/usr/share/fonts/TTF/DroidSerif-Bold.ttf:
/usr/share/fonts/TTF/DroidSansDevanagari-Regular.ttf:
/usr/share/fonts/TTF/DejaVuSansCondensed-BoldOblique.ttf:
/usr/share/fonts/Type1/z003034l.pfb:
/usr/share/fonts/TTF/DroidSansFallback.ttf:
/usr/share/fonts/TTF/courbi.ttf:
/usr/share/fonts/TTF/comicbd.ttf:
/usr/share/fonts/Type1/b018012l.pfb:
/usr/share/fonts/Type1/p052004l.pfb:
/usr/share/fonts/TTF/DroidSerif-Italic.ttf:
/usr/share/fonts/TTF/webdings.ttf:
/usr/share/fonts/Type1/b018015l.pfb:
/usr/share/fonts/Type1/a010033l.pfb:
/usr/share/fonts/TTF/DroidSansTamil-Bold.ttf:
/usr/share/fonts/Type1/p052003l.pfb:
/usr/share/fonts/Type1/a010035l.pfb:
/usr/share/fonts/TTF/DejaVuSerifCondensed-Bold.ttf:
/usr/share/fonts/Type1/n019063l.pfb:
/usr/share/fonts/TTF/trebuc.ttf:
/usr/share/fonts/TTF/courbd.ttf:
/usr/share/fonts/Type1/n019064l.pfb:
/usr/share/fonts/TTF/Vera.ttf:
/usr/share/fonts/TTF/DroidSansMono.ttf:
/usr/share/fonts/Type1/p052024l.pfb:
/usr/share/fonts/TTF/impact.ttf:
/usr/share/fonts/TTF/ariali.ttf:
/usr/share/fonts/TTF/DejaVuSans-Oblique.ttf:
/usr/share/fonts/Type1/a010013l.pfb:
/usr/share/fonts/TTF/DroidSansFallbackFull.ttf:
/usr/share/fonts/Type1/p052023l.pfb:
What I've read, there should be /usr/share/fonts/local/* too in that list.
I run my window manager, dwm with startx and ~/.xinitrc has these lines before dwm:
xset +fp /usr/share/fonts/local
xset fp rehash
I have also tried to include those with xorg.conf:
$ cat /etc/X11/xorg.conf
Section "Files"
FontPath "/usr/share/fonts/local/"
EndSection
I'm using Ubuntu's patched versions of freetype, fontconfig and cairo if that has anything to do with my problem:
freetype2-ubuntu fontconfig-ubuntu cairo-ubuntu
Xft fonts work fine with urxvt, but bitmaps don't. What am I missing?
Last edited by NAND (2013-01-29 16:13:00)

There isn't a "tamsynu" family in the tamsyn-font package. You're trying to use a font that doesn't exist on your machine.
$ xlsfonts -fn "-*-tamsynu-*"
xlsfonts: pattern "-*-tamsynu-*" unmatched
$ xlsfonts -fn "-*-tamsyn-*"
-misc-tamsyn-bold-r-normal--0-0-100-100-c-0-iso8859-1
-misc-tamsyn-bold-r-normal--12-87-100-100-c-60-iso8859-1
<< And more >>
The syntax for the resource is fine, but it is case-sensitive. The class is 'URxvt', an instance would be 'urxvt'.
This should be good for a first attempt at the proper size:
urxvt.font: -misc-tamsyn-medium-r-normal--14-101-100-100-c-70-iso8859-1
urxvt.boldFont: -misc-tamsyn-bold-r-normal--14-101-100-100-c-70-iso8859-1
That's about equal to DejaVu Sans Mono at 8 points.
If you have rebuilt your font cache, either by restarting X or running 'fc-cache -f', and you want to use Xft, then this is equivalent (Tamsyn does not use anti-aliasing):
urxvt.font: xft:Tamsyn:style=Regular:size=10.1
urxvt.boldFont: xft:Tamsyn:style=Bold:size=10.1

C3150 local to a PC and I want to print color not greyscale

I have a home network. The HP C3150 is local to a PC on the network and is shared and usable by my IMAC (SnowLepoard). I can print greyscale fine. Need to print in color and not sure where I need to change the settings.
Kent

This will depend on what driver you are using. When a Mac connects to a Windows shared printer it often cannot use the vendors original driver. For this type of connection an alternate driver, such as Gutenprint, is often required. Given that your printing is working fine in mono there is a chance that you are using a driver that only supports b&w. If you open Print & Fax, select the printer and then open Options & Supplies, under the Driver tab will be what your Mac is using. If you can reply with this driver name then I can check if this driver supports color printing.

Copy vectors as bitmap, and not svg

Hello,
I used to copy vectors from illustrator to softwares like Axure, with cmd+c and cmd+v. It worked pretty well until CC.
Illustrator CC only copies vectors as SVG objects. So when you're in Axure, it copies the SVG code and not the bitmap object !! I understand the need for such a thing in HTML (even if I doubt that it will be often used), but I didn't find any turnaround to be able to copy this vector inside Axure, which is, in my opinion, the biggest use of the copy feature from illustrator to any other software (like Word for example, which also copies the SVG code and not the bitmap object)....
Is there a way to copy the bitmap object instead of the SVG code ?
Thanks !

17.1 update released today for Illustrator CC contains a preference to turn off "SVG Code" copying to clipboard, uncheck this option to disable SVG code copying to clipboard.
This should solve copy paste from Illustrator to Axure
-Rama
Illustrator Team

Glow over bitmap does not work

Hello
I have put an effect on a path: stylise > outer glow.
The pass is partly over a bitmap. The part of the path that's not over the bitmap has a normal glow, but the part of the path that is over the bitmap has a glow so weak , it's almost invisible.
Please check the following link for a picture that shows the problem: http://david.saber.free.fr/bazaar/problems/illustrator-glow-over-bitmap.jpg
How can I fix this?
Thanks in advance,
David

I have created the FX with the Appearance palette,using the "FX button" at its bottom.
I think you both nailed it with the color mode.
My source image is a Photoshop CS6 file set to CMYK.
My Illustrator document is also set to CMYK.
When I went to file > document color mode > and switched from "CMYK" to "RGB", the problem disapeared! So thank you both for the help.
But the problem is: this document is intended for printing.
Should I work in RGB in Illustrator, then export to Photoshop and then convert to CMYK before printing?
Perhaps I could just export to PDF from Illustrator, as I beleive exporting to PDF automatically converts to CMYK?
Thanks again and see you,
David

To bitmap or not, that is the question

Hello my tuning friends.
I am running Oracle 11.2 (on Solaris 10) for a very active OLTP database, but that is also frequently used to pull reports on the most volatile critical table in the database.
My database has anywhere from 100 to 400 concurrent users.
Our application (REMEDY) is designed to put "tickets" in a single main table (with approx. 560 fields that 40 are clobs).
The dilemma I need help with is whether to put a bit map index on some of the low cardinality columns or not.
And, for that matter, many columns in this table are very low cardinality.
My fear is that I am afraid that putting a bitmap index on a highly active OLTP table might impede performance of ticket creations (new rows in the table).
Or, if I did it, can I have a job run every night that recreates the bitmap indexes on this table?
But what about performance on the table between the time of rebuilding the BM indexes?
In this case, this is a typical query that is run against our main table (containing approx. 6m records and is 16G in size).
When I look in OEM, I see that it does a full table scan on this table, and in this case, only returns 262 records.
Obviously, you can infer the columns in the predicate clause are very low cardinality (by the names of the columns and the values searched).
SELECT "Main_Ticket"."SHORTTICKETNUMBER"      ,
        "Main_Ticket"."OUTAGESEVERITY"        ,
        "Main_Ticket"."OUTAGESEVERITYTEXT"    ,
        "Main_Ticket"."OUTAGESERVICESLIST"    ,
        "Main_Ticket"."OUTAGESTATUS"          ,
        "Main_Ticket"."OUTAGEOVERALLSTARTTIME",
        "Main_Ticket"."OUTAGEOVERALLENDTIME" ,
        "Main_Ticket"."CITY"                  ,
        "Main_Ticket"."STATE"                 ,
        "Main_Ticket"."MASTEROUTAGE"          ,
        "Main_Ticket"."GROUPCREATEDBY"        ,
        "Main_Ticket"."GROUPASSIGNEDTO"
FROM "ARADMIN"."MAIN_TICKET" "Main_Ticket"
WHERE "Main_Ticket"."OUTAGESEVERITY"<=2
        AND NOT
                "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'BBSG%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'CIA%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'DESIGNED%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'IHD%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NABB%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NCC%'
                OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NFC%'
        )I'm assuming to put the bitmap index on "OUTAGESEVERITY".
Not sure about GROUPASSIGNEDTO, because it uses the LIKE function and may not use the BM index if it had one.
In this case, would a FBI be better?
Edited by: 974632 on Feb 27, 2013 6:29 AM

>
clobs).
The dilemma I need help with is whether to put a bit map index on some of the low cardinality columns or not.The whole "low cardinality" thing for bitmap indexes is very misleading - the primary consideration for bitmap indexes is whether or not your queries can COMBINE enough of them to produce high-precision access path into the table. (And, of course, they're almost always very bad news on an OLTP system).
When I look in OEM, I see that it does a full table scan on this table, and in this case, only returns 262 records.Is this because a very small fraction of the rows have "OUTAGESEVERITY"<=2, or do a lot of them match that predicate but disappear on on the next predicate ?
>
FROM "ARADMIN"."MAIN_TICKET" "Main_Ticket"
WHERE "Main_Ticket"."OUTAGESEVERITY"<=2
AND NOT
"Main_Ticket"."GROUPASSIGNEDTO" LIKE 'BBSG%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'CIA%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'DESIGNED%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'IHD%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NABB%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NCC%'
OR "Main_Ticket"."GROUPASSIGNEDTO" LIKE 'NFC%'
)In this case, would a FBI be better?Depends on why you get only 262 rows as a final result, and whether or not you're allowed to change the code. A simple b-tree index on outagseverity with a frequency histogram on the column MIGHT be enough if there are only a small number of rows with outageseverity = 2.
An FBI might be more stable if this form of query is common and you are only interested in "rare" values - in which case a simple option would be to create an FBI (or virtual column with index) that was null for common values, and exposed the outageseverity for "rare" values.
If you need to cross-check the groupassignedto at the same time as checking for "relatively rare" values, you could create a two column index where the first column exposed the "relatively rare" values of outageseverity, and the second column exposed the groupassignedto only if the first column was not null.
You'd have to modify the SQL suitably to use the FBI's though - which is why the availability of virtual columns might be of some benefit.
Tables with more than 254 columns are a bad idea, by the way, and get worse for every (approximate) multiple of 256.
Regards
Jonathan Lewis

Bitmap monochrome (not greyscale)

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