Treatment performance tree
I have a performance problem in Oracle 9i, when you try to filter in a tree hierarchy. I guess it's because of my limited understanding of the manipulation of the data sets.The ideas are greatly appreciated.
Here's the business problem:
Identify each tree which has a member with information on sales, but no billing information, where a member at a lower level has your billing information, but no information of sales.
Here is the abstract data schema:
T table contains one row for each Member of the tree. There is a column to indicate whether the Member is the root of the tree, the name of the Member, the Member id and the id of the parent of the Member.
Table S contains information on sales and contains a foreign key to a member id T
Table B contains billing information and has a foreign key to a member in T id
I can recover trees of T as follows:
Root of REPLACE (SYS_CONNECT_BY_PATH (DECODE(LEVEL,1,T.id),'~ '),'~ ') SELECT as.
T.ID,
T.Nom,
Depth LEVEL
T
START WITH T.root_ind = TRUE
CONNECT BY PRIOR T.id = T.parent_id
AND T.parent_id <>T.id - root parent_id is auto
I can use a construction WITH to find permanent members with details S and no details of B, and it is ok:
WITH the tree AS
(Root of SELECT REPLACE (SYS_CONNECT_BY_PATH (DECODE(LEVEL,1,T.id),'~ '),'~ '))
T.ID,
T.Nom,
Depth LEVEL
T
START WITH T.root_ind = TRUE
CONNECT BY PRIOR T.id = T.parent_id
T.parent_id AND <>T.id - root parent_id is auto)
SELECT tree1.root, tree1.id, tree1.name, tree1.depth
Trees, tree1
WHERE THERE ARE
(SELECT 1
S s1
WHERE s1.t_id = tree1.id)
AND NOT EXISTS
(SELECT 1
B B1
WHERE b1.t_id = tree1.id)
However, the performance of tanks when I try to add the following condition to limit the results to members who have a member at a lower level in the tree that has info B but not S Info:
AND THERE ARE
(SELECT 1
TREE tree2
WHERE tree2.root = tree1.root
AND tree2.depth > tree1.depth
AND THERE ARE
(SELECT 1
B B2
WHERE b2.t_id = tree2.id)
AND NOT EXISTS
(SELECT 1
S s2
WHERE s2.t_id = tree2.id))
Hello
First of all, let me clarify the problem. Sindou this data:
t.id t.parent.id100 100 -- root110 100 -- 110 has Sales, but no Billing120 100121 120 -- 121 Has Billing, but no Sales
You want to select all the lines, because they belong to a tree that has
(1) a member (id = 110, LEVEL = 2) with sales and no billing, and
(2) another Member (id = 121, LEVEL = 3) with billing but no sales, at a higher level.
It does not matter that 110 is not an ancestor of 121; all that matters is that thery are in the same tree and that 110 is closer to the root than 121.
Also, you don't need to know which nodes meet the conditions, exactly what made some nodes in the tree.
Here are two things you could try, separately or together:
(1) instead of a normal request from top to bottom (where you start with the roots and working your way down the tree to help 'CONNECT BY PRIOR id = parent_id'), do a query from the bottom up, i.e. start with the id that meet specific conditions (like sales but no billing) and work your way up the tree using "id CONNECTION is parent_id PREREQUISITE."
(2) instead of working directly with the table t, working with a view that has the relevant information of t, as well as the id possesses or billing data, and it has or not sales data.
What version of Oracle are you using?
If you describe table t a little more, I can try to re-create the problem.
How many rows in table t?
What percentage have given billing?
What is the percentage of sales have made?
How many roots is t?
What is the average number of children per node, or what the average level of a node?
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Please correct me if am wrong anywhere,
in the case where if a bad method used to send data (retrieved using a select clause)
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Pradeep cordially.
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[ongoing] com.hegenberg.BetterTouchTool.52192
[ongoing] com.pilotmoon.popclip.72032
[operation] com.runningwithcrayons.Alfred - 3.145632
[ongoing] ua.com.AntLogic.Antnotes.48352
ua.com.AntLogic.AntnotesLauncher [loading]
[loading] 397 tasks Apple
[operation] 212 tasks Apple
AdobeAAMDetect: AdobeAAMDetect 1.0.0.0 - SDK 10.6 (2016-02-08) [Support]
FlashPlayer - 10.6: 21.0.0.242 - SDK 10.6 (2016-05-24), [Support]
QuickTime Plugin: 7.7.3 (2016-05-17)
AdobePDFViewerNPAPI: 15.010.20056 - SDK 10.8 (2015-12-19) [Support]
AdobePDFViewer: 15.010.20056 - SDK 10.8 (2015-12-19) [Support]
Flash Player: 21.0.0.242 - SDK 10.6 (2016-05-24), [Support]
Default browser: 601 - SDK 10.11 (2016-05-17)
npDDRia: 0.0.14.3 - 10.9 SDK (2014-10-02) [Support]
SharePointBrowserPlugin: 14.6.4 - SDK 10.6 (2016-05-17) [Support]
MeetingJoinPlugin: Unknown - SDK 10.6 (2014-08-05) [Support]
JavaAppletPlugin: Java 8 update 65 build 17 (2015-11-03) check the version of
1Password - AgileBits - https://agilebits.com/onepassword (2016-05-24)
Cleaner Facebook - Sonny Fazio - http://sonstermedia.com (07-08-2014)
Adblock more - Eyeo GmbH - https://adblockplus.org/ (2016-03-29)
QR Code Generator - D.G. Midwinter - http://www.midwinter-dg.com/downloads.html (2016-02-15)
Save on Pocket - Read It Later, Inc. - http://getpocket.com/ (2015-11-10)
Sho.RT - Nowy - http://nowy.co.nr (07-08-2014)
Flash Player (2016-05-10) [Support]
Java (2015-11-03) [Support]
Time Machine not configured!
4% WindowServer
2% Dropbox
kernel_task 2%
1% iStatMenusDaemon
0% AdobeCRDaemon
Top of page process of memory: ⓘ
955 MB kernel_task
Mdworker (15) 246 MB
Safari of 246 MB
Dropbox 197 MB
180 MB mds_stores
9.75 GB of free RAM
6.25 GB used RAM (3.71 GB being cached)
Used Swap 0 B
24 may 2016, 15:12:46 Self test - passed
24 may 2016, 01:55:15 PM/Library/Logs/DiagnosticReports/Adobe Flash Player install Manager_2016-05-24-135515_ [redacted] .crash
/ Applications/utilities/Adobe Flash Player install Manager to Install Flash Player Manager.app/Contents/MacOS/Adobe
Ways to help make a slow Mac faster
17 reasons why your Mac runs slower than expected
Slow performance of Mac? This Article addresses!
Difficulty of slow start in OS X | MacFixIt - CNET Reviews
How to fix the slow down time and start. | MacTip.net
6 easy tips to speed up OS X Yosemite on your Mac.
Avoid using third-party software that claims to clean your computer. This software does more harm than good. In addition, you don't need it. Note that all computers become slower over time even in the normal conditions of use. Generally, the experienced users erasing the hard drive and do a clean install from scratch at least once a year or every time that the installation of a major upgrade of the OS. Well sure doing so also means that you need to maintain regular and several backups.
Add more RAM or reduce the number of simultaneously executed from applications and utilities. Remove unnecessary software such as anti-malware and that promises to clean your Mac. Look for the runaway process: Runaway applications can shorten the battery life, affect performance and increase the heat and fan activity. Also, visit The FAQ XLab and read the FAQ on the treatment with The Spinning Beach Ball of Death.
The ultimate solution
Back up everything, wipe the drive, reinstall OS X and restore your data from backup. Reinstall the third-party software of original/zero media.
[Permission to use any part of the foregoing has been granted by khati, exclusively, to theratter.]
Nothing really stood out in the report of EtreCheck as a cause of poor results.
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MacBook pro early 2011 performs badly. Everyone is struggling?
I use my MBP for music software, which is designed for Mac. For several years, he has had performance problems, including the latency and excessive use of RAM. Savings projects took much time - I now have an iMac, which is pretty powerful, so I don't see the difference. I had increased the MBP to speed in the treatment of 16 GB of RAM, and it has a processor i7 at 2 GHz. What I need to be able to do is to run some programs for the productivity of the music.
I was on the phone with an Apple technician and many unused items were d´letter of the laptop.
I have removed more than 300 GB of items from the hard drive and everything is now on an external drive and I'm now very efficient.
Ableton and Traktor still run slowly and there must be a problem with the graphics card as elements by selecting among the toolbars can take some time.
This poll is normal?
I can't remember how much I paid, but it was' cheap and right now, I need another.
Another thing-battery was never used directly as it was connected by power cable, but battery exhausted after about 2 years
I hope the 2016 model will be significantly improved if not a surface book seeks attractive for the same cost!
Your computer is almost 5 years old and was purchased at a time where Apple was moving its software and engineering material to turn hard drives SSD. If you have upgraded your MBP OS each year or while Apple released new versions you may have noticed that the computer's performance declined with the upgrade to version 10.9 (Mavericks). If you want that your current MBP to operate as before, you can do two things: 1) wipe the drive and install a version of the OS drive without exceed 10.8 or 2) replace the Interior with an SSD. Of course, the other option is to buy a new computer but do not purchase the MBP with a DVD internal 13 '' because it's the material has not been upgraded in 3 years.
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Poor performance on Tecra T9100
Hi my Tecra t9100 runs very slow even if theres no activity, Windows Task Manager watching > taskmgr.exe process is active and takes the largest part of the treatment. Performance > historical usage CPU running at about 95 to 100% which gives very little idle system.
can someone help please...
Hello
On this path, it is not easy to say why the performance is so bad. I have a unit in my office with 512 MB of RAM and it works well. I sometimes use it for graphic editing, and there is no problem at all.
Each unit's individual configured and preinstalled. I recommend you to check all running processes. I noticed that many antivir tools are responsible for slow laptop performance. Disable all unnecessary processes and on this way, the CPU will be more power for other applications.
By the way: how much RAM is there?
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