Estimate cache displacement - optimum size of CACHE_SIZE

Is there a way to determine out of the statistics data in the dbanalyzer what would be the optimum cache size for the database?
I want to know that because we plan to buy a new box and I want to size it so the actual "daily used data" is in the cache -> no (or few) User-UKTs doing reading I/O. So basically building something like an "in memory database".
Markus

> interesting are the physical I/O. This tells us that not all pages which have to be processed can be found in the data Cache.
Yes - and there's a lot of it
> The parameter LRU_FOR_SCAN restricts the size of the data cache which is used for Scans. More Info about the Data Cache configuration you will find in the MaxDb Internals slides: [Parameters|http://maxdb.sap.com/training/internals_7.6/kernel_parameters_EN_76.pdf]
LRU_FOR_SCAN is set to NO. If we would set that to YES and one person would start a big job (MRP-runs for PP, CO precaluations etc.) this would "trash" the full cache and all other UKTs would need to do I/O to get their current data again.
> Could it be that we have a lot of scans in the system on large tables?
> Did you get any more detailrd information with the Command Monitor which commands (Reports) have to read from disk?
No full table scans but "just" longrunning jobs (tablename, runtime, Cache I/O, Disk I/O)
Table     Runtime          P accesses     P Cache I/O     # Disk I/O
===================================================================
COVP     61.866,92     6.289.191     196.602          6.092.589
ACCTIT     35.678,21     5.215.440     896.540          4.318.900
COSS     12.321,35     1.872.759     606.268          1.266.491
BALHDR     12.238,66     1.134.360     65.534          1.068.826
COSS     12.109,92     1.764.038     601.264          1.162.774
VBRP     11.909,13     1.850.768     660.289          1.190.479
COSS     11.188,26     1.872.726     601.976          1.270.750
BKPF     8.734,46     916.325          65.534          850.791
There's not a single table scan done, all are done via IX_RG or PK_RG or a combination of them. Those are just the "top 10", there are much more of those.
What I now want to archive is the Disk-I/O becoming 0 due to a big CACHE_SIZE.
>
> May be we should analyze this directly on your system via OSS call to get more ideas.
340157/2008 - same question there too
Markus

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Why has my Adobe PCD cache.db file size started growing suddenly

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Hello,
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How to reduce configuration cache file Quota size located in ( C:\Windows\ccmcache ) for all client from SCCM 2012 server

How to reduce configuration cache file Quota size located in ( C:\Windows\ccmcache ) for all client from SCCM 2012 server
Thanks in Advance
NTRao

Hi,
There are numerous ways to change the cache size.
You could deploy a vbscript to a collection of the devices.
On Error Resume Next
Dim UIResManager
Dim Cache
Dim CacheSize
CacheSize=20000
Set UIResManager = createobject("UIResource.UIResourceMgr")
Set Cache=UIResManager.GetCacheInfo()
Cache.TotalSize=CacheSize
Or you could use a configuration item.
http://blog.coretech.dk/heh/configuration-items-and-baselines-using-scripts-powershell-example/
You can also use the right click tools by Now Micro on a collection, if all the servers are on this would be the easiest / quickest way.
http://www.nowmicro.com/recast/right-click-tools/
http://www.david-obrien.net/2013/02/how-to-configure-the-configmgr-client/
select SMS_R_SYSTEM.ResourceID, SMS_R_SYSTEM.ResourceType, SMS_R_SYSTEM.Name, SMS_R_SYSTEM.SMSUniqueIdentifier, SMS_R_SYSTEM.ResourceDomainORWorkgroup, SMS_R_SYSTEM.Client from SMS_R_System where SMS_R_System.OperatingSystemNameandVersion like '%6.2%'
https://msdn.microsoft.com/en-us/library/windows/desktop/ms724832%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396

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If you set the contact using Entourage, Outlook, or even MobileMe it'll be a tiny little image...
Here's what you need to do instead!
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Material Cost Estimate with different lot size.

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The costing lot size impacts your cost estimate if you have lot size independent costs (i.e. setup cost). Those fixed costs are spread over the costing lot sizee to give you a cost per unit.. Larger costing lot sizes can also help you minimize rounding issues.
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Why are files in Firefox 33 cache directory different size than saved files on desktop

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To find these files without going through them one at a time, I would copy the cache folder on a desktop folder and then use Double Killer to delete the same size files in both the cache and the saved files in the desktop file folder. The files that are left behind in the cache folder are those that did not save to the desktop file and folder. I can then double check to see if I can find the videos, flash or images from the remaining files.
I have updated to Firefox 30.0.3. The problem now is that the files in the cache are different in KB size from the saved files on the desktop folder. The dimensions of a saved image are the same but the size of the file differ. Now I can not use Double Killer to delete files and have to go through the whole cache directory one by one to find files that were not saved.
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Current Firefox 32+ releases use a new cache service named Cache2 and this cache service works differently.
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Web Cache Acess.log Size

Hi all,
Windows 2000 Server
Oracle Application Server 10G
Web Cache 9.0.4.0.0
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is there anything like UNIX "tail" in windows world ???

Please check the event log settings namely 'flush interval'. Set this to be very small or diable buffering. Now check it. One possibility is that the event log's size is too small (say it has only 1 or 2 lines in it) to rollover. Also, try restarting Web cache and admin servers and try again.
Regards,
Priyanka GES
Oracle Web Cache Team

Can't change ACR cache location or size

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Since Adobe apps are slightly retarded and don't follow symlinks, an attempt to sneak in a different location under a symlink ended up as expected in a crash.
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No, links don't really work with any Adobe apps, at least not on OSX. Just try to create a symlink to any of the Camera Raw settings folders (lens profiles, camera profiles - so that they are all the same on all my computers) - no dice. I write OSX software for a living and know my way with symlinks - not sure what Adobe is doing but they don't work.
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OLTP SGA Optimum Size

Hi Everybody,
I have a Database running Oracle 9i, release 9.2.0.6.0 64bit. It is running on an IBM PSeries with AIX 5L, 8gb RAM, but only 4 scsi disks of 136gb each. My current DB configuration is set as a General Database. Numbers are as follows in bytes:
buffer_cache=2684354560
free memory=536870912
library cache=354736912
sql area=323717552
free memory=310946880
miscellaneous=75226840
db_block_hash_buckets=22162544
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KQR L PO=4770048
log_buffer=4457472
dictionary cache=3229952
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PL/SQL DIANA=2604688
KGLS heap=2016608
KQR M PO=1751744
sessions=1203280
1M buffer=1056768
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VIRTUAL CIRCUITS=911480
KSXR pending messages que=853952
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errors=115104
subheap=102312
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trigger inform=21008
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pl/sql source=9384
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Variable Size=1979711488
I'm having big headaches with locks. I understand my Database is a OLTP but never configured it like that. I missed the opportunity at the time of creation. What would be a goos start un numbers for a SGA settings?
Please help...

Kevin Tyson wrote:
I don't know why people are talking about RAID and other hardware issues when the question was about the SGA. To determine whether your SGA is the right size, you need to calculate the buffer cache hit ratio, the library cache hit ratio, and other SGA stats. Your library cache hit ratio should be over 90 percent unless your developers didn't use bind variables. Your buffer cache hit ratio depends on your application, but if it's below 80 percent I would look at the top ten offending SQL statements by disk reads, buffer hits, and CPU. That's just a start. I have scripts at home for doing these things in Oracle9i. I might respond with them this weekend.
Kevin TysonThis is so completely, utterly wrong, I can't even begin to describe why. See [the faq|http://www.orafaq.com/wiki/Improving_Buffer_Cache_Hit_Ratio]. It was wrong even in the days when tfsmstat.sql was written, around 1993.
The title of the thread is about SGA, but the question is about locks. The question is making a questionable assumption that the SGA size has something to do with locks.
Original Poster: Please post the locking evidence that has you thinking whatever it is you are thinking. It is conceivable that having a large SGA may cause latching issues in some odd circumstances, but really, there are several methodologies that can lead quite directly to the actual problem. Hit ratio tuning is not one of them. Here is one way. It may help us help you if run a statspack for 15 minutes during a bad time and post the results.
Most performance issues are due to code, the first thing you need to do is figure out if you have a code problem or a system tuning problem. Raid 0 is not a good sign. Nothing wrong with asking about a recommended SGA, but as you can see, it doesn't get you far if no one sees an obvious wrong.

How to estimate a rollback segment size for a big transaction?

Oracle 8.1.5. Suppose I have the following statement:
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Hello I have a table like below I want to know 1 record size in KB
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Can you tell me in this way
int =
Name=
File=
Createdate=
User
So it will help me in future to calculate myself.

HI,
try this.
DECLARE @sql nvarchar(max),@clmns nvarchar(max),@table nvarchar(100),@ln varchar(max)
SET @table = 'REGIONS'
SELECT @clmns =
STUFF((
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STUFF((
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PRINT @ln
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Optimum Size for Web Gallery

In trying to set up galleries that have quick view time, I'm trying to follow iPhoto advise and use a Medium sized photo for Web Galleries. iPhoto help sez:+When you send, print, or publish a photo from your iPhoto library, you need to choose the right size+. For me that would be Medium size.
However I can find no place to determine size. How can I choose the size I want to use?

smidi:
I believe that statement pertains to situation where you can control the size of the file to be used. However, in publishing a Web Gallery iPhoto determines the size. If you don't select the option to have viewers download the photos then the image size is 800 x 600 pixels. If you selected the download option then the full sized file is uploaded for viewer to download.
For emailing, if you use Mail, you will get a window which lets you select the size of image/file to send. For printing you want to use the largest size you can so you get the max resolution available.
Do you Twango?
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've written an Automator workflow application (requires Tiger), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 08 libraries. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.

Confused with optimum size and publishing

It seems like it should be a fairly straightforward process to select a project size at the start of a Captivate project and then publish at the end and watching Adobe videos saying how easy it all is now to publish across platforms with HTML5 etc you would think so.
When I started my current project I selected 1024 x 768 as I have a large main screen, plus two smaller screens here at work. When I went to publish, I selected both swf and HTML5 and selected scalable HTML content. I then saved the .htm file to my web folder here at work and then viewed the new link. My default web browser is Firefox and I was horrified to see the movie appear as a tiny postage stamp size on the screen. Also when I tried it on my smartphone, clicking on the buttons caused the slides to jump too far ahead.
I then decided to re-save my project and re-size it to iPad landscape. I then published two different versions, the original 1024 x 768 version as swf with scalable HTML content and a second re-sized iPad version as HTML5 with no scalable HTML. Both versions worked fine on either pc (scaling nicely for the different sized screens I have) and also worked fine on my smartphone. However, in Firefox I still got the postage stamp sized movie.
I am now trying a new re-sized project as 995 x 627 and my intention is not to use scalable HTML content and publish it to both swf and HTML5 and see how that looks on everything.
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There isn’t a one-size-fits-all (no pun intended) size for Captivate trainings that will look perfect on multiple devices. If you need to have the training viewable on multiple devices then you should use the scalable options when publishing. Without scaling you’ll end up with scrollbars on devices that use varying resolutions and can’t fit all the content onscreen. The only way not making content scalable would be possible is if Captivate had a device aware function that allows the content to fit the screen, like you can code in Dreamweaver, but that would seriously increase your development time.
The Firefox problem has to do with a bit of code that Captivate uses in the html templates. Open the html file that’s generated with your published files and remove the text "http://www.w3.org/TR/html4/loose.dtd" from the first line. Then when the file is opened in Firefox it won’t display the content really tiny. You can also remove this from your template files so it’s never included when you publish.

Estimate cache displacement - optimum size of CACHE_SIZE

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