Performance of row_number, rank and dense_rank

Hello

Nature of my data is such that using row_number, rank and dense_rank give the same results. Which is faster?

Hello

Tested with my own set of data and performance are as follows.

DENSE_RANK (faster) > rank > row_number (slower)

Tags: Database

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How to improve the performance of your computer and free up space.

Original title: the unwanted temporary files of windows is at the origin of the problems of proformanace

According to a check of problem: the unwanted files temporary windows could take to improve the performance of your computer and free up space.

Can anyone help with this simple problem.

Angelo

Hi Angelo,.

1. which edition of Windows are you running?

Example: Windows 7 Professional 32 bit.

Please follow the below link to clean unwanted temporary files.

Delete files using disk cleanup

http://Windows.Microsoft.com/en-us/Windows7/delete-files-using-disk-cleanup

Microsoft at home.

Slow PC? Optimize your computer for peak performance

http://www.Microsoft.com/athome/Setup/optimize.aspx#fBid=MDw_uUbCmMl

Make slate: how to remove the unwanted files and programs

http://www.Microsoft.com/athome/Setup/CleanSweep.aspx#fBid=MDw_uUbCmMl

See also,

http://answers.Microsoft.com/en-us/Windows/Forum/Windows_7-performance/performance-improve-slow-system-slow-startup/d0fd7b04-CD3c-4CE0-A9D6-60b6221171f0?msgId=cc2624b0-1972-4EC6-B1A4-f46140d44401

I hope this helps.

Performance is very slow and CPU use 90%

Hello
Can u please help me for the question below.
Wres
DJ

I run esxtop and see what the CPU and go from there.

Please explain ranking and score?

I am familiar with basic SQL and PL/SQL. I met the following clause in a query, I do not understand:
SELECT...
T1.valueA,
T1. DateValue,
T1.valueB,
T1.dateValue_2,
IsCurrent
(SELECT
Decode (ROW_NUMBER () over)
(order by T1.dateValue ASC T1.valueA partition), 1, DECODE (sign (T1.dateValue - sysdate), 1, ' n 'Y'), 'n') as IsCurrent
"N" as IsCancellable
dense_rank () over (partition T1.valueA order by T1.valueB desc, T1.dateValue desc, T1.dateValue_2 desc) as rank
T1 etc...

If it's just a way of ordering within groups.

No - no groups. The partition clause is about the creation of 'sets', not groups. The word 'group' has a very specific meaning in SQL and it is important that it be not used incorrectly or people are going to get confused.

When the data are combined the result often put less than rows as there are in the source data because data are aggregated.

When the data is partitioned any line is destroyed or created but data "sets" are produced.

Function Rank and duplicate records
Hello

I have the following table:

CREATE TABLE A_TEST (AN INTEGER, B INTEGER, INTEGER C D INTEGER, CHAR (11) PAVILION);

INSERT INTO A_TEST (A, B, C, D) VALUES (1,2,3,4).
INSERT INTO A_TEST (A, B, C, D) VALUES (2,4,5,8);
INSERT INTO A_TEST (A, B, C, D) VALUES (1,2,3,4).
INSERT INTO A_TEST (A, B, C, D) VALUES (2,4,5,8);
INSERT INTO A_TEST (A, B, C, D) VALUES (7,2,3,4);
INSERT INTO A_TEST (A, B, C, D) VALUES (9,2,3,4);
INSERT INTO A_TEST (A, B, C, D) VALUES (7,2,3,4);
INSERT INTO A_TEST (A, B, C, D) VALUES (1,2,3,4).
INSERT INTO A_TEST (A, B, C, D) VALUES (5,4,5,8);
INSERT INTO A_TEST (A, B, C, D) VALUES (2,2,3,9);
INSERT INTO A_TEST (A, B, C, D) VALUES (2,4,5,8);
INSERT INTO A_TEST (A, B, C, D) VALUES (6,2,3,4);
INSERT INTO A_TEST (A, B, C, D) VALUES (1,3,3,4);
INSERT INTO A_TEST (A, B, C, D) VALUES (8,2,8,4);

"I want to perform an update on the FLAG column by setting"D"if it's a record.1, 2, 3, 4 in doubles);

I would use the rank function.

Desired update:

A B C D FLAG
1 2 3 4
2, 4, 5, 8
1     2     3     4     D
2     4     5     8     D
7 2 3 4
9 2 3 4
7     2     3     4     D
1     2     3     4     D
5 4 5 8
2 2 3 9
2, 4, 5, 8
6 2 3 4
1 3 3 4
8 2 8 4

Thank you
I guess that your output is not correct for '2 4 5 8', it shows two as valid records and only one record as duplicate. If you are right, you must explain the logic.

something like that...
```
update a_test b
   set b.flag = 'D'
 where b.rowid in (select row_id
                     from (select a.rowid row_id,
                                  a,
                                  b,
                                  c,
                                  d,
                                  rank() over(partition by a, b, c, d order by rownum) rn
                             from a_test a)
                    where rn > 1)
```

Performance of Time Capsule and "device not found".

I am now on my 2nd TC average weeks because I thought the first was broken-, but I get the same questions on the second >
1. A Wi - fi connection is very intermittent. Seat 3 feet of the TC, I can get 450Mbps on my iPhone 6 and 5 minutes later her stockings to 2Mbps or less (measured on the Wi - Fi Sweetspot app). Similarly, the speed of connection internet test ranging from 20-30Mbps until 0.3Mbps not it depending on the strength of the wifi.
2. Air utility sometimes connection works and see the TC. But often it is not. First he asks the password, maybe 2 or 3 times. Can I get a yellow triangle showing on utility AP with "Device not found" and the only option is to Forget. The TC IS still there, but since I use it for ethernet and wifi internet access still works because I am always online.
So, what speeds SHOULD I get the Wi - Fi, 3 feet of the TC - I would have thought higher?

Why WiFi speed decreases considerably, sometimes in the same place?

Why the Airport utility is not the device, when it is still there?

Is this a general problem with TCs? Is this another duff, one back?

Thank you

Update you the firmware to 7.7.7 in the TC?

If all tests performed 7.7.7 then downgrade the firmware to 7.7.3 as he could work much better.

If it still fails I just return it.

They seem to vary a lot in quality of construction. Some work OK but many have problems... and when you Exchange to the same store you get another from the same lot.

There are a lot of articles on wireless diagnosis.

for example, from your Mac.

Use Wireless Diagnostics helps you troubleshoot Wi - Fi on your Mac - Apple Support

Follow the wireless in a few days... and use ethernet if possible... Wireless is never a reliable substitute for ethernet.

iOS

If your iPhone, iPad or iPod touch connects to a Wi - Fi - Apple Support network

A lot of wireless issues with each new version of iOS... he could so your phone that is the problem, not only the TC.

https://www.YouTube.com/watch?v=j4qgH8uyOk0

You should check how wireless is around you and the intensity of the signal of all devices.

I also need to know the exact of the TC configuration and your network if you want to find the problem. Although problems with the Wi - Fi in the TC would be not at all unusual.

Google cannot perform an image search and gives an error message no matter what I'm looking for.

This is the message I get when I search for images: your search could not be performed with the requested search options. This is regardless of what I'm looking for.

This problem may be caused by corrupted cookies.

Clear the cache and cookies from sites that cause problems.

"Clear the Cache":
- Tools > Options > advanced > network > storage (Cache) offline: 'clear now '.
'Delete Cookies' sites causing problems:
- Tools > Options > privacy > Cookies: "show the Cookies".

Performance of Windows 7 and the differences of 32 and 64-bit...

Here you can see the performance from one version to the other differences in the assessment of the experience with Windows 7 at his little two versions 32 and 64 ultimate.

http://1.BP.blogspot.com/_vQInzvdaQQ8/Ssp4QUm7ylI/AAAAAAAABcE/aV82zFxifh8/S1600-h/Sistema64Bits.PNG

http://1.BP.blogspot.com/_vQInzvdaQQ8/Ssp4MsJ27PI/AAAAAAAABb8/XSmlARqrcEQ/S1600-h/32bitsimage.jpg

Post edited by: merlinpat

32-bit operating systems are limited to 3 GB, but the performance is similar in Internet/desktop applications every day.

If you do a lot of creating media (e.g. video coding high definition or music production), 64-bit would be a better option.

Mac slow before performing at El capitan and after

EtreCheck version: 2.7.8 (238)

Report generated 2016-01-30 14:36:13

Download http://etrecheck.com EtreCheck

Time 03:35

Performance: good

Click the [Support] links to help with non-Apple products.

Click the [details] links for more information on this line.

Click [delete] to remove the adware.

Problem: The computer is too slow

Description:

I was running the OS before El Capitan, and it is running slower and slower. When I ran the disc utilities, clean permissions etc, I noticed elements of iPhoto & iTunes seem to show more often, so I thought that updated to El Capitan to resolve issues related to the but didn't, it's just slow, if not worse. Also cleaned the hard drive (160 GB HD space), recently ran OnyX, no help

Hardware information: ⓘ

MacBook Pro (15 inch, late 2011)

[Technical details] - [User Guide] - [Warranty & Service]

MacBook Pro - model: MacBookPro8, 2

1 2.5 GHz Intel Core i7 CPU: 4 strands

4 GB of RAM expandable - [Instructions]

BANK 0/DIMM0

OK 4 GB DDR3 1333 MHz

BANK 1/DIMM0

Vacuum

Bluetooth: Old - transfer/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Battery: Health = Normal - Cycle count = 597 - SN = D8614010AQKDGDMA9

Video information: ⓘ

Intel HD Graphics 3000

AMD Radeon HD 6770M - VRAM: 1024 MB

Color LCD 1680 x 1050

System software: ⓘ

OS X El Capitan 10.11.1 (B 15, 42) - since the start time: about 2 hours

Disk information: ⓘ

Hitachi HTS727575A9E362 disk0: (750,16 GB) (rotation)

EFI (disk0s1) : 210 MB

HD (disk0s3) [recovery] recovery: 650 MB

Macintosh HD (disk 1) /: 748,93 (Go 155,99 free)

Storage of carrots: disk0s2 749.30 GB Online

HL-DT-ST DVD - RW GS31N)

USB information: ⓘ

Computer, Inc. Apple IR receiver.

Apple Inc. FaceTime HD camera (built-in)

Apple Inc. Apple keyboard / Trackpad

Apple Inc. BRCM2070 hub.

Apple Inc. Bluetooth USB host controller.

Information crush: ⓘ

Apple Inc. Thunderbolt_bus.

Goalkeeper: ⓘ

Mac App Store and identified developers

Kernel Extensions: ⓘ

/Applications/transmit.app

com.panic.TransmitDisk.transmitdiskfs [no charge] (4.0.0 - 10.5 SDK) [Support]

/ System/Library/Extensions

com [no charge]. Logitech.Control Center.HID Driver (3.6.0 - 10.6 SDK) [Support]

com [no charge]. Driver Logitech.Unifying.HID (1.2.0 - 10.6 SDK) [Support]

[loading] com.logmein.driver.LogMeInSoundDriver (4.1.55f95) [help]

[no charge] com.seagate.driver.PowSecDriverCore (5.0.1) [Support]

[no charge] com.Wacom.kext.pentablet (5.2.6) [Support]

/ System/Library/Extensions/Seagate storage Driver.kext/Contents/PlugIns

[no charge] com.seagate.driver.PowSecLeafDriver_10_4 (5.0.1) [Support]

[no charge] com.seagate.driver.PowSecLeafDriver_10_5 (5.0.1) [Support]

[no charge] com.seagate.driver.SeagateDriveIcons (5.0.1) [Support]

Launch officers: ⓘ

com [running]. Logitech.Control Center.Daemon.plist [Support]

[loading] com.adobe.AAM.Updater - 1.0.plist [Support]

[ongoing] com.adobe.AdobeCreativeCloud.plist [Support]

[ongoing] com.extensis.FMCore.plist [Support]

com.Google.keystone.agent.plist [loading] [Support]

com.logmein.LMILaunchAgentFixer.plist [failure] [Support]

[ongoing] com.LogMeIn.logmeingui.plist [Support]

[ongoing] com.LogMeIn.logmeinguiagent.plist [Support]

com.LogMeIn.logmeinguiagentatlogin.plist [loading] [Support]

[loading] com.oracle.java.Java - Updater.plist [Support]

[ongoing] com.seagate.SeagateStorageGauge.plist [Support]

com.TeamViewer.TeamViewer.plist [loading] [Support]

com.TeamViewer.teamviewer_desktop.plist [loading] [Support]

[ongoing] com.Wacom.pentablet.plist [Support]

Launch of the demons: ⓘ

com.adobe.ARM [running]. [...]. plist [Support]

[ongoing] com.Adobe.adobeupdatedaemon.plist [Support]

com.Adobe.agsservice.plist [loading] [Support]

com.Adobe.fpsaud.plist [loading] [Support]

com.adobe.versioncueCS3.plist [loading] [Support]

com.Google.keystone.daemon.plist [loading] [Support]

[ongoing] com.LogMeIn.logmeinserver.plist [Support]

com.LogMeIn.raupdate.plist [loading] [Support]

[loading] com.oracle.java.Helper - Tool.plist [Support]

com.teamviewer.Helper.plist [loading] [Support]

com.TeamViewer.teamviewer_service.plist [loading] [Support]

Launch User Agents: ⓘ

[loading] com.adobe.AAM.Updater - 1.0.plist [Support]

[loading] com.adobe.ARM. [...]. plist [Support]

com.Akamai.single - user - client.plist [race] [Support]

com.apple.CSConfigDotMacCert [fail]-[...] @me.com - SharedServices.Agent.plist

com.citrixonline.GoToMeeting.G2MUpdate.plist [loading] [Support]

User login items: ⓘ

iTunesHelper hidden Application (/ Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Firefox application (/ Applications/Firefox.app)

TransmitMenu UNKNOWN (missing value)

Dropbox application (/ Applications/Dropbox.app)

AdobeResourceSynchronizer Application (/ Applications/Adobe Acrobat 8 Professional / Adobe Acrobat Professional.app/Contents/Support/AdobeResourceSynchronizer.app)

Suitcase Fusion 3 UNKNOWN (missing value)

Adobe Illustrator CC 2014 application (/ Applications/Adobe Illustrator 2014/Adobe Illustrator.app CC)

Adobe InDesign CC 2014 Application (/ Applications/Adobe InDesign 2014/Adobe InDesign CC 2014.app CC)

Adobe Photoshop CC 2014 Application (/ Applications/Adobe Photoshop 2014/Adobe Photoshop CC 2014.app CC)

Request for EvernoteHelper (/ Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)

Other applications: ⓘ

com.adobe.InDesign.27552 [loading]

com.adobe.Photoshop.28192 [loading]

[operation] com.adobe.acc.AdobeDesktopService.97312.D9648766-E94C-415F-A789-92E7453F649A

[ongoing] com.Adobe.accmac.51552

com.Adobe.Illustrator.23392 [loading]

[ongoing] com.Apple.XPC.launchd.oneshot.0x1000000d.EtreCheck

[ongoing] com.deskconnect.Mac.31712

com.deskconnect.Mac.helper [loading]

[ongoing] com.evernote.EvernoteHelper.32992

[ongoing] com.getdropbox.dropbox.1952

[ongoing] com.wacom.Consumer_TouchDriver.8032

[ongoing] com.wacom.TabletDriver.96992

[ongoing] JP.co.Canon.cijscannerregister.8352

[ongoing] org.Mozilla.Firefox.9312

Internet Plug-ins: ⓘ

o1dbrowserplugin: Version: 5.41.3.0 - 10.8 SDK [Support]

WacomNetscape: Version: 1.1.1 - 1 [Support]

Unity Web Player: Version: UnityPlayer version 5.0.3f2 - 10.6 SDK [Support]

Default browser: Version: 601 - SDK 10.11

WacomTabletPlugin: Version: 2.0.0.4 WacomTabletPlugin [Support]

AdobeAAMDetect: Version: 3.0.0.0 - SDK 10.9 [Support]

FlashPlayer - 10.6: Version: 20.0.0.286 - 10.6 SDK [Support]

AdobePDFViewerNPAPI: Version: 11.0.13 - 10.6 SDK [Support]

LogMeIn: Version: 1.0.961 - SDK 10.7 [Support]

QuickTime Plugin: Version: 7.7.3

Flash Player: Version: 20.0.0.286 - 10.6 SDK [Support]

googletalkbrowserplugin: Version: 5.41.3.0 - 10.8 SDK [Support]

LogMeInSafari32: Version: 1.0.961 - SDK 10.7 [Support]

AdobePDFViewer: Version: 11.0.13 - 10.6 SDK [Support]

Silverlight: Version: 5.1.40728.0 - 10.6 SDK [Support]

EPPEX plugin: Version: 4.1.0.0 [Support]

JavaAppletPlugin: Version: version check Java 8 66 17 construction update

The internet user Plug-ins: ⓘ

CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Support]

The Safari Extensions: ⓘ

Searchme Adware! [Remove]

iTube Studio

Slick spare Adware! [Remove]

Amazon Shopping Assistant Adware! [Remove]

EBay shopping Assistant Adware! [Remove]

3rd party preference panes: ⓘ

Adobe Version Cue CS3 [Support]

Akamai NetSession preferences [Support]

Flash Player [Support]

Java [Support]

Logitech Control Center [Support]

Time Machine: ⓘ

Skip system files: No.

Automatic backup: YES

Volumes to back up:

Macintosh HD: Disc size: 748,93 GB disc used: 592,94 GB

Destinations:

G - DRIVE [Local]

Total size: 2.00 TB

Total number of backups: 70

An older backup: 2014 - 05-09 at 12:01 AM

Last backup: 2016-01-20, 16:30

Size of backup drive: adequate

Backup TB 2.00 size > (disc 592,94 GB X 3)

Top of page process CPU: ⓘ

18% firefox

10% mdworker (15)

5% kernel_task

5% WindowServer

3 per cent lsd (2)

Top of the process of memory: ⓘ

627 MB firefox

499 MB kernel_task

213 MB mdworker (15)

82 MB mail

Suggestd 61 MB

Information about virtual memory: ⓘ

88 MB free RAM

3.91 GB of used RAM (643 MB Cache)

27 MB used Swap

Diagnostic information: ⓘ

January 30, 2016, 12:25:41 PM/Library/Logs/DiagnosticReports/Adobe Illustrator_2016-01-30-122541_ [redacted] .hang

/ Applications/Adobe Illustrator CC 2014/Adobe Illustrator Illustrator.app/Contents/MacOS/Adobe

January 30, 2016, 12:25:40 PM/Library/Logs/DiagnosticReports/Adobe InDesign CC 2014_2016-01-30-122540_ .hang [deleted]

/ Applications/Adobe InDesign 2014/Adobe InDesign 2014.app/Contents/MacOS/Adobe InDesign 2014 CC CC CC

January 30, 2016, 12:25:35 PM/Library/Logs/DiagnosticReports/Adobe Photoshop CC 2014_2016-01-30-122535_ .hang [deleted]

/ Applications/Adobe Photoshop 2014/Adobe Photoshop 2014.app/Contents/MacOS/Adobe Photoshop 2014 CC CC CC

January 30, 2016, 11:48:25 self test - passed

January 28, 2016, 07:41:51 PM/Library/Logs/DiagnosticReports/Adobe Photoshop CC 2014_2016-01-28-194151_ [deleted item].cpu_resource.diag [details]

January 27, 2016, 23:01:14 / Library/Logs/DiagnosticReports /? _2016-01-27 - 230114_.cpu_resource.d [deleted item] iag [details]

???

January 27, 2016, 22:45:35 /Library/Logs/DiagnosticReports/FMCore_2016-01-27-224535_[redacted].crash

/ Applications/Suitcase Fusion 6.app/Contents/Resources/FMCore

January 27, 2016, 10:44:24 PM/Library/Logs/DiagnosticReports/Adobe InDesign CC 2014_2016-01-27-224424_ .hang [deleted]

When you see a beachball cursor or the slowness is particularly bad, note the exact time: hour, minute, second.

These must be run as administrator. If you have only one user account, you are the administrator.

Run the Console application in one of the following ways:

☞ Enter the first letters of his name in a Spotlight search. Select from the results (it should be at the top).

☞ In the Finder, select go utilities ▹ of menu bar or press the combination of keys shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

The title of the Console window should be all Messages. If it isn't, select

SYSTEM LOG QUERIES ▹ all Messages

in the list of logs on the left. If you don't see this list, select

List of newspapers seen ▹ display

in the menu at the top of the screen bar.

Each message in the journal begins with the date and time when it was entered. Highlight date back to the time you noted above.

Select the messages entered since then until the end of the episode, or until they begin to repeat, whichever comes first.

Copy messages to the Clipboard by pressing Control-C key combination. Paste into a reply to this message by pressing command + V.

The journal contains a large amount of information, almost all this is useless to solve any particular problem. When you post a journal excerpt, be selective. A few dozen lines are almost always more than enough.

Please don't dump blindly thousands of lines in the journal in this discussion.

Please do not post screenshots of log messages - text poster.

Some private information, such as your name, may appear in the log. Anonymize before posting.

When you post the journal excerpt, an error message may appear on the web page: "you include content in your post that is not allowed", or "the message contains invalid characters." It's a bug in the forum software. Thanks for posting the text on Pastebin, then post here a link to the page you created.

If you have an account on Pastebin, please do not select private in exposure menu to paste on the page, because no one else that you will be able to see it.

Lenovo Energy Management optimized battery health decreases the performance of the CPU and GPU

Hello!

I have a little problem with my IdeaPad Y510P. When I select a maximum autonomy, everything works fine at maximum performance, but when I choose optimized battery, my laptop works about 50% of its performance or lower, which is enough when I'm not playing, but when I do, the decline in performance is really disturbing compared to the option of maximum battery life.

Does anyone has a solution for this? I like to keep performance upward and the Crescent of the battery at the same time. I've updated my driver of the LEM and also software, and I use Win 8.1 64-bit.

Thanks in advance!

After a few days the problem solved self . Thank you very much for the help!

Slow down the performance of the system and unable to access My Documents

Title: Looking for elements...

I have a lot of files and folders in my My Documents folder and when I click on them, most often the status bar in Explorer says "search elements...". "and it will stay there for 30 seconds sometimes now. How can I get the browser to just display the files and folders in the folder that I'm looking all sweep and not try to determine what is in any or to display thumbnails etc.?

Hello

-How much memory is available on your computer?

-How much free space is available on the C: drive?

-You are aware of any changes made on the computer before this problem?

This can happen only when there is less space on the hard disk, a lot of junk files, temporary files, unused programs and also bad sectors on the hard drive.

So to improve the performance of the computer, I advise you to follow the steps from the link below and check if the problem persists.

Maintenance tasks that improve performance

http://Windows.Microsoft.com/en-us/Windows-XP/help/Setup/maintenance-improve-performance

Note: The data files that are infected must be cleaned only by removing the file completely, which means that there is a risk of data loss.

Hope this information helps.

Difference in performance between the CTA and INSERT / * + APPEND * / IN

Hi all
I have a question about the ETG and "Insert / * + Append * / Into" statements.
Suite deal, I have a question that I did not understand the difference in operating times EXADATA.
The two tables of selection (g02_f01 and g02_f02) have not any partition. But I could partition tables with the method of partition by column "ip_id" hash and I tried to run the same query with partition tables. Change anything in execution times.
I executed plan gather statistics for all tables. The two paintings were 13.176.888 records. The two arrays have same "ip_id' unique columns. I want to combine these tables into a single table.
First request:
Insert / * + append parallel (a, 16) * / in dg.tiz_irdm_g02_cc one
(ip_id, process_date,...)
Select / * + parallel (a, 16) parallel (16B) * / *.
tgarstg.tst_irdm_g02_f01 a.,
tgarstg.tst_irdm_g02_f02 b
where a.ip_id = b.ip_id

Elapsed = > 45: 00 minutes

Second request:
create table dg.tiz_irdm_g02_cc nologging parallel 16 compress for than query
Select / * + parallel (a, 16) (b, 16) parallel * / *.
tgarstg.tst_irdm_g02_f01 a.,
tgarstg.tst_irdm_g02_f02 b
where a.ip_id = b.ip_id
Elapsed = > 04:00 minutes

Execution plans are:

1. Enter the statement execution Plan:
Hash value of plan: 3814019933
------------------------------------------------------------------------------------------------------------------------------------------
| ID | Operation | Name | Lines | Bytes | TempSpc | Cost (% CPU). Time |    TQ | IN-OUT | PQ Distrib.
------------------------------------------------------------------------------------------------------------------------------------------
|   0 | INSERT STATEMENT.                  |    13 M |    36G |       |   127K (1) | 00:00:05 |        |      |            |
|   1. LOAD SELECT ACE | TIZ_IRDM_G02_CC |       |       |       |            |          |        |      |            |
|   2.   COORDINATOR OF PX |                  |       |       |       |            |          |        |      |            |
|   5:    PX SEND QC (RANDOM). : TQ10002 |    13 M |    36G |       |   127K (1) | 00:00:05 | Q1, 02 | P > S | QC (RAND) |
|* 4 |     IN THE BUFFER HASH JOIN |                  |    13 M |    36G |   921 M |   127K (1) | 00:00:05 | Q1, 02 | SVCP |            |
|   3:      RECEIVE PX |                  |    13 M |    14G |       | 5732 (5) | 00:00:01 | Q1, 02 | SVCP |            |
|   6.       PX SEND HASH | : TQ10000 |    13 M |    14G |       | 5732 (5) | 00:00:01 | Q1 00 | P > P | HASH |
|   7.        ITERATOR BLOCK PX |                  |    13 M |    14G |       | 5732 (5) | 00:00:01 | Q1 00 | ISSUE |            |
|   8.         STORE TABLE FULL ACCESS | TST_IRDM_G02_F02 |    13 M |    14G |       | 5732 (5) | 00:00:01 | Q1 00 | SVCP |            |
|   9.      RECEIVE PX |                  |    13 M |    21G |       | 18353 (3) | 00:00:01 | Q1, 02 | SVCP |            |
| 10.       PX SEND HASH | : TQ10001 |    13 M |    21G |       | 18353 (3) | 00:00:01 | Q1, 01 | P > P | HASH |
| 11.        ITERATOR BLOCK PX |                  |    13 M |    21G |       | 18353 (3) | 00:00:01 | Q1, 01 | ISSUE |            |
| 12.         STORE TABLE FULL ACCESS | TST_IRDM_G02_F01 |    13 M |    21G |       | 18353 (3) | 00:00:01 | Q1, 01 | SVCP |            |
------------------------------------------------------------------------------------------------------------------------------------------
Information of predicates (identified by the operation identity card):
---------------------------------------------------
4 - access("AIRDM_G02_F01".") IP_ID '= 'AIRDM_G02_F02'.' IP_ID")
2 - DEC execution Plan:
Hash value of plan: 3613570869
------------------------------------------------------------------------------------------------------------------------------------------
| ID | Operation | Name | Lines | Bytes | TempSpc | Cost (% CPU). Time |    TQ | IN-OUT | PQ Distrib.
------------------------------------------------------------------------------------------------------------------------------------------
|   0 | CREATE TABLE STATEMENT.                  |    13 M |    36G |       |   397K (1) | 00:00:14 |        |      |            |
|   1. COORDINATOR OF PX |                  |       |       |       |            |          |        |      |            |
|   2.   PX SEND QC (RANDOM). : TQ10002 |    13 M |    36G |       |   255K (1) | 00:00:09 | Q1, 02 | P > S | QC (RAND) |
|   3.    LOAD SELECT ACE | TIZ_IRDM_G02_CC |       |       |       |            |          | Q1, 02 | SVCP |            |
|* 4 |     HASH JOIN |                  |    13 M |    36G | 1842M |   255K (1) | 00:00:09 | Q1, 02 | SVCP |            |
|   5.      RECEIVE PX |                  |    13 M |    14G |       | 11465 (5) | 00:00:01 | Q1, 02 | SVCP |            |
|   6.       PX SEND HASH | : TQ10000 |    13 M |    14G |       | 11465 (5) | 00:00:01 | Q1 00 | P > P | HASH |
|   7.        ITERATOR BLOCK PX |                  |    13 M |    14G |       | 11465 (5) | 00:00:01 | Q1 00 | ISSUE |            |
|   8.         STORE TABLE FULL ACCESS | TST_IRDM_G02_F02 |    13 M |    14G |       | 11465 (5) | 00:00:01 | Q1 00 | SVCP |            |
|   9.      RECEIVE PX |                  |    13 M |    21G |       | 36706 (3) | 00:00:02 | Q1, 02 | SVCP |            |
| 10.       PX SEND HASH | : TQ10001 |    13 M |    21G |       | 36706 (3) | 00:00:02 | Q1, 01 | P > P | HASH |
| 11.        ITERATOR BLOCK PX |                  |    13 M |    21G |       | 36706 (3) | 00:00:02 | Q1, 01 | ISSUE |            |
| 12.         STORE TABLE FULL ACCESS | TST_IRDM_G02_F01 |    13 M |    21G |       | 36706 (3) | 00:00:02 | Q1, 01 | SVCP |            |
------------------------------------------------------------------------------------------------------------------------------------------
Information of predicates (identified by the operation identity card):
---------------------------------------------------
4 - access("AIRDM_G02_F01".") IP_ID '= 'AIRDM_G02_F02'.' IP_ID")
Oracle version:
Oracle Database 11 g Enterprise Edition Release 11.2.0.4.0 - 64 bit Production
PL/SQL Release 11.2.0.4.0 - Production
CORE Production 11.2.0.4.0
AMT for Linux: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production

Notice how this additional distribution has disappeared from the non-partitioned table.

I think that with the partitioned table that oracle has tried to balance the number of slaves against the number of scores he expected to use and decided to distribute the data to get a 'fair sharing' workload, but had not authorized for the side effects of the buffer hash join which was to appear and extra messaging for distribution.

You could try the indicator pq_distribute() for the insert to tell Oracle that he should not disrtibute like that. for example, based on your original code:

Insert / * + append pq_distribute parallel (a, 16) (a zero) * / in dg.tiz_irdm_g02_cc one...

This can give you the performance you want with the partitioned table, but check what it does to the space allocation that it can introduce a large number (16) of extensions by segment that are not completely filled and therefore be rather waste of space.

Concerning

Jonathan Lewis

The difference in performance between wins 8 and win 7.

What performance difference is there between winning 8 and win 7, or does go through whats in win 8 which is not in win 7?

What performance difference is there between winning 8 and win 7, or does go through whats in win 8 which is not in win 7?

http://www.TechSpot.com/review/561-Windows8-vs-Windows7/

http://www.TechRadar.com/us/news/software/operating-systems/Windows-8-vs-Windows-7-8-ways-its-different-1025285

http://www.askvg.com/comparison-between-Windows-7-and-Windows-8-memory-management-system/

Performance (listener APEX) glassFish and ADR issues

Hello world
We have a number of applications available APEX to APEX Listener installed on 4.1 GlassFish (Open Source Edition). The APEX is version 2.0.9.224.01.07.
Any installation is using the default values, the documentation available now.
The problem is that after a while (two days, maybe weeks) the answer is really slow, which means you have to wait a few minutes to change pages or get the application to react. While everything works normally by another instance of GlassFish and auditor of the APEX, which means that everything is ok with the database and the problem must be with the GlassFish and/or listener of the APEX. After you restart GlassFish domain things to improve for a while, but finally that we are facing problems of performance even. There is nothing suspicious in the newspapers of GlassFish, and we do not know where to look further.
I tried the web search for more information on how to configure GlassFish and APEX listener for the documentation and production environments, but did not find much. We increased settings memory JVM for GlassFish to 2 GB, but I would like to know is there something else about the GlassFish settings (son HTTP, JDBC, pool etc.) we could do to avoid the problems described, or is there a way to detect what is the real problem. Any suggestions or pointers to relevant documents?
Thanks in advance,
Bruno

Hi bruno2,

bruno2 wrote:

We have a number of applications available APEX to APEX Listener installed on 4.1 GlassFish (Open Source Edition). The APEX is version 2.0.9.224.01.07.

Any installation is using the default values, the documentation available now.

The problem is that after a while (two days, maybe weeks) the answer is really slow, which means you have to wait a few minutes to change pages or get the application to react. While everything works normally by another instance of GlassFish and auditor of the APEX, which means that everything is ok with the database and the problem must be with the GlassFish and/or listener of the APEX. After you restart GlassFish domain things to improve for a while, but finally that we are facing problems of performance even. There is nothing suspicious in the newspapers of GlassFish, and we do not know where to look further.

I tried the web search for more information on how to configure GlassFish and APEX listener for the documentation and production environments, but did not find much. We increased settings memory JVM for GlassFish to 2 GB, but I would like to know is there something else about the GlassFish settings (son HTTP, JDBC, pool etc.) we could do to avoid the problems described, or is there a way to detect what is the real problem. Any suggestions or pointers to relevant documents?

For ADR + Glassfish performance should be on two fronts:
- Side of GlassFish:
As you use 4.1 GlassFish (Open Source Edition) you should refer to the official documentation for Glassfish 4.

Reference: https://glassfish.java.net/docs/4.0/performance-tuning-guide.pdf

But as I've used Oracle Glassfish Server 3.1 which comes with the integrated tuner. I just follow the following documentation:

Reference: https://docs.oracle.com/cd/E18930_01/html/821-2431/toc.html and https://docs.oracle.com/cd/E18930_01/html/821-2431/gkxwm.html
- Side of ADR:
The performance tuning side ADR includes the correct JDBC settings in the ADR configuration files.

Reference: http://krisrice.blogspot.in/2012/05/apex-listener-jdbcsecurity-setup.html

So, set your ADR for instance so that you get the performance you want. For this you will need: change the JDBC settings-> load/stress test and repeat this operation.

Stress/load tests is shown by Morten Bråten in the following blog in his blog series about ADR.

Reference: ORA-00001: Unique constraint violated: ADR, installation Oracle XE and Apex on CentOS - part fourth: Stress tests

NOTE: This blog is for ADR + Apache Tomcat, but ADR configuration settings remain the same in your case.

Finally, if you want to see more practical best ADR with Oracle APEX follow the slides for "ADR in the Production" by Dietmar Aust.

Reference: daust_de: Oracle XE / APEX: presentation for my ADR slides talk to KScope 2015

NOTE: This presentation is also to ADR + Apache Tomcat, but things related to ADR are same in your case.

Also, as this thread is related to ADR, you must move this thread to the appropriate forum: ADR, SODA & JSON in the database

Kind regards

Kiran

Performance of row_number, rank and dense_rank

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