Driver performance with CLOB
Hi,
I use the "thin" driver with Apple's WebObjects and I noticed that when I do a fetch on a table with a CLOB column, it take more than one minute to get the results back when the result set is more than 500 rows. So I did some tests with SQLGrinder, a SQL tool that also uses JDBC to talk to databases, and it's the same slowdown. But if I remove the CLOB column, the fetch takes less than 3 seconds. Does Oracle's JDBC driver is know to be slow in those situations ? I use the 9.2.0.5.0 driver with a 1.4 JDK (Apple supplied on Mac OS X 10.3).
Hi,
How big is the data that is being stored in the CLOB column. Ideally in case of LOBs and BFILEs the data is read either in chunks or as streams and that needs to be separately coded. I am not sure if fetching the column directly using a select would be fast.
You can try selecting the columns other then the CLOB column and see the performance.
Here are some benchmarck results published on asktom. You might be interested in it.
http://asktom.oracle.com/pls/ask/f?p=4950:8:6959536613259786285::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:1310802216301
Thanks,
Khalid
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Photocopy 13.0
Photoshop 3D Engine 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Picture Package Filter 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Pinch 13.0
Pixar 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Plaster 13.0
Plastic Wrap 13.0
PNG 13.0
Pointillize 13.0
Polar Coordinates 13.0
Portable Bit Map 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Poster Edges 13.0
Radial Blur 13.0
Radiance 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Range 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Read Watermark 4.0
Reticulation 13.0
Ripple 13.0
Rough Pastels 13.0
Save for Web 13.0
ScriptingSupport 13.1.2
Shear 13.0
Skewness 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Smart Blur 13.0
Smudge Stick 13.0
Solarize 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Spatter 13.0
Spherize 13.0
Sponge 13.0
Sprayed Strokes 13.0
Stained Glass 13.0
Stamp 13.0
Standard Deviation 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
STL 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Sumi-e 13.0
Summation 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Targa 13.0
Texturizer 13.0
Tiles 13.0
Torn Edges 13.0
Twirl 13.0
Underpainting 13.0
Vanishing Point 13.0
Variance 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Variations 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Water Paper 13.0
Watercolor 13.0
Wave 13.0
Wavefront|OBJ 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
WIA Support 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
Wind 13.0
Wireless Bitmap 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00)
ZigZag 13.0
Optional and third party plug-ins:
DAZ Studio 3D Bridge 12.0
DazUpdateScene 12.0
Plug-ins that failed to load: NONE
Flash:
Mini Bridge
Kuler
Installed TWAIN devices: NONEGreat news!
I followed your suggestion, Noel, and uninstalled my drivers with the Catalyst Uninstall Utility (which I hadn't used before), rebooted, reinstalled Catalyst 13.2 Beta 7, rebooted, deleted the PS Prefs, started PS, and now the performance is radically improved!
It baffles me why I would need to do a clean driver uninstall in a new system environment that has only ever had this video card, and is only a few months old, but that action seems to be what's improved the situation. Note that because I deleted the PS preferences, the good performance now occurs with the default Use Graphics Processor enabled, and Drawing Mode set to Advanced (with every feature in the Advanced dialog checked except 30bit display).
Having no reference point, I can't tell for sure if performance is as good as it theoretically ought to be for my system specs, but using the standard 13px brush is only slightly laggy behind the cursor, even if I become reckless and squiggle on the canvas violently. It wasn't just sluggish response before: Photoshop seemed to be in pain trying to draw the line segments as it laboured to catch up to the cursor. That is pretty much gone now.
Much more tellingly, zooming and panning the canvas is like it ought to be, responsive and clean, more or less like it was for me in CS4 with my old Nvidia 9600GT. The poor performance with zooming and panning was the most worrying aspect of the issue. It's a great relief to see these working more properly now.
I have to confess I'm a little embarrassed to have drug you through all this hassle only to discover that something as rudimentary as properly cleaning out the drivers would be the apparent solution. I never would have imagined that doing that, with such a new and stable system, would make any difference, since I don't have a legacy of older drivers dotting my hard drive. In any event, I'm really grateful that you guys took the time to try to help me.
In the interest of completeness, here's the relevant portion of my system info after doing the reinstall steps I mentioned above:
Adobe Photoshop Version: 13.1.2 (13.1.2 20130105.r.224 2013/01/05:23:00:00) x64
Operating System: Windows 8 64-bit
Version: 6.2
System architecture: Intel CPU Family:6, Model:14, Stepping:5 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2
Physical processor count: 4
Processor speed: 2665 MHz
Built-in memory: 16379 MB
Free memory: 13680 MB
Memory available to Photoshop: 14695 MB
Memory used by Photoshop: 60 %
Image tile size: 1024K
Image cache levels: 4
OpenGL Drawing: Enabled.
OpenGL Drawing Mode: Advanced
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
OpenGL Allow Old GPUs: Not Detected.
OpenCL Version: 3.0
OpenGL Version: 3.0
Video Rect Texture Size: 16384
OpenGL Memory: 2048 MB
Video Card Vendor: ATI Technologies Inc.
Video Card Renderer: AMD Radeon HD 7800 Series
Display: 1
Display Bounds: top=0, left=0, bottom=1080, right=1920
Video Card Number: 2
Video Card: AMD Radeon HD 7800 Series
Driver Version:
Driver Date:
Video Card Driver: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.d ll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Video Mode: 1920 x 1080 x 4294967296 colors
Video Card Caption: AMD Radeon HD 7800 Series
Video Card Memory: 2048 MB
Video Card Number: 1
Video Card: Microsoft Basic Render Driver
Driver Version: 12.100.17.0
Driver Date: 20130226000000.000000-000
Video Card Driver:
Video Mode:
Video Card Caption: Microsoft Basic Render Driver
Video Card Memory: 0 MB
As you can see, the Microsoft Basic Render Driver still appears as a Video Card in the list. This presumably has something to do with Windows 8, and I really don't know if its presence here is still a sign that my card is not being used to its optimal capability. I have a hunch that the slight lag that I am still experiencing with the brush when Use Graphics Processor is on -- totally absent with the acceleration turned off -- implies that Photoshop is still unable to take maximum advantage of my card. I would assume that the brush tool should be more responsive with acceleration on than off, in a rig without any issues, but that's just assumption on my part. If you turn off Use Graphics Processor on your systems, is the brush tool more or less responsive?
But again, panning the canvas with the hand tool is now extremely responsive, without any screen tearing or visible lag, and that's a massive improvement over the total meltdown of performance I was suffering from before.
Thanks again very much for your help. I'm grateful to all of you who took the time to chime in. -
I'm looking for an upgrade in space ( 750gb - 1 TB) and performance on the hard drive, but I have read in many forums that many "compatible" hard drives may damage the OS. I plan on installing bootcampt with Windows 7 and the latest Mac OS. I'm wondering if anyone has updated their HD and if they've experienced any problems with it, or if anyone has any suggestions. Thank you for your advice in advance!
rchu89 wrote:
I'm wondering if anyone has had any particular experience with the Seagate 1TB solid state hybrid drive (found here: http://www.amazon.com/Seagate-Solid-Hybrid-2-5-Inch-ST1000LM014/dp/B00B99JUBQ). It boasts SSD-like speeds at a fraction of the cost, and its right around my budget, but perhaps its too good to be true?
I have two of those Seagate SSHDs, using one as the internal drive in my primary MBP. Boot and shutoff times are dramatically less than before (using 7200 rpm HGST HDDs). In other respects, I have no complaints regarding the drive performance. I can recommend them based on my limited experience (~3 months). The $99 price does look very attractive.
Note that when you install a HDD of larger capacity in a MBP, it should be reflected in your backup strategy. Do you have a backup drive to accommodate the additional data that you will be able to store on the new internal HDD?
Ciao. -
Bad performance with brandnew system
hello,
i set up a completely new win7-64bit based on a fresh osx (snow-leopard update) on a fresh harddisk....and i have very bad 3d performance with only 3 (!!) programs installed. i am working with autodesk 3ds max and autocad and both run very slow. my last system was win7-64bit, too, but running MUCH faster.
it must be a driver problem, but i dont know how to change the nvidia driver.
edit:
after having changed driver from directx 9 to open-gl performance is very fast.
please help.
alex
Message was edited by: mbp_3dHi Bruno
In the following Re: Generic Sync: Object can not be deserilized / Multiple synchronization call you had mentioned that you are using MI 2.5 SP16 Client. For your information MI doesnt support Windows Mobile 5 OS on SP16 but only from SP18 does it support this OS. Have you tried upgrading the client to any of the SPs i had mentioned in the above thread and then checked the performance?
Best Regards
Sivakumar -
JDBC ADPATER - "Unsupported feature" in XI with CLOB type
Hi experts,
I have 15 patch XI level. In a stored procedure i use an in and out parameter with CLOB type. I get the exception:
com.sap.aii.af.ra.ms.api.DeliveryException: Error processing request in sax parser: Error when executing statement for table/stored proc. 'XXXX'): java.sql.SQLException: Unsupported feature
If i change the type CLOB by VARVHAR in the XI's XML (Design: Integration Buider), all works fine.
The strored procedure has this parameter like CLOB.
My question is
Is not possible to use the CLOB type?
SAP recognize that it, it's possible:
http://help.sap.com/saphelp_nw04/helpdata/en/2e/96fd3f2d14e869e10000000a155106/frameset.htm
Sorry for my english. Thanks in advance.Hi,
Please make sure you use the 10.x driver for full stored procedure CLOB support.
A CLOB is a not comparable Datatype in SQL.
Regards,
Prateek
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