Very poor Random IO performance of 24 HDD Mirror-2 CSV on Win2012 R2 (Solved)

We already have a 2 separate Win2012 Mirror-2 Storage Clusters (in production) and had noted that performance was very poor.
We were looking to upgrade to Win2012R2 and storage tiering, we wanted to understand why the storage systems were performing so poorly. So, we have not built out a new storage cluster, with 2 nodes, 3 JBODs and 24 x2TB Seagate ES2 SAS drives.
We have run IOMeter to measure IOPs and the numbers are very poor, regardless of the 'geometries' we choose. Our Write IOPs results for 16KB block (this our typical DB page size) are:
2 columns, 64KB Interleave = 1043
2 columns, 256KB Interleave = 1176
4 columns, 64KB Interleave = 1424
4 columns, 256KB Interleave = 1688
8 columns, 256KB Interleave = 1677
We only tested Write IO because this should be the slowest/worse case IOPs values.
We also tested each HDD individually and they range between 270 and 330 IOPs.
By our math, the IOPs values should be in the range of 3000-3600 == 24 HDDs x IOPs/HDD div by 2 [for mirror-2], but the tested are showing values which are barely 50% of this.
Any assistance/tips would be appreciated.
16KB I/Os never touch the whole RAID stripe so that's why you see virtually never performance increase (I;m surprised you actually see any). Try using bigger request size to see would it make any difference. You need multiple workers and deep I/O queues.
What are you I/O Meter settings for test except write size?
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Similar Messages

Very poor SMB share performance on 3TB time capsule.

Hi,
Is the SMB shares performance on time capsule suposed to be very poor compared to the AFP shares?
My TC will to around 9MB/s transfers using AFP, but on SMB it will do around 1.25MB/s (varies from a few KB/s to peaks of 4MB/s).
I tested both protocols using a ethernet cable connected from my macbook pro directly to the TC.
This is a 3TB time capsule runing firmware 7.6.1, and I did a factory reset before my tests.
Time machine backups were disabled during the tests.
I need SMB for my WDTV media players.

I would not say it is supposed to be.. but you are probably correct that it is very poor.. This issue crops up time and again,,, but not from people running Macs generally.. it is windows that is the problem.
A few things to check.
1. Are the names actually SMB correct?? ie short, no spaces, pure alphanumeric. Both TC name and wireless names if you use wireless.
2. Workgroup set correctly. ie WORKGROUP .. this probably doesn't come up with the Mac but affects most PC connections and possibly the WD TV
3. How old is the TC? If it is an early release Gen 4, you can take it back to 7.5.2 firmware.. frankly much of the trouble was introduced with Lion.. as they changed the SAMBA setup.. I would test from the WDTV.. or a PC.. if it doesn't glitch you are doing better than the Mac can do.. ie the reading in the Mac is pure Lion Lunacy.. https://discussions.apple.com/thread/3206668?start=0&tstart=0
One of those apple changes that shows.. they hardly test anything anymore. Do a google search for Lion SMB fix.

Very Poor Final Cut Performance

We just upgraded to a Final Cut system from an older Avid system, but it seems to be performing well below expectations. If anyone could make suggestions, they would be greatly appreciated.
Syptoms:
- Dropping frames on virtually every application, from mere audio to standard def.
- a weird flicker when playback stops (the screen goes black then refreshes with expected picture)
- choppy edges on resized windows. (Real-time but it doesn't ask for a render)
- Difference in color between paused video and playing video. (The playback appears to be the "correct" color)
Explination of system:
Apple G5 running mac os 10.4.3
Dual 2.3 Ghz Processor
2.5 gigs memory
ATI X850XT Video Card
Blackmagic's Decklink HD Pro
Blackmagic's HD Link
Final Cut Studio (Final Cut Pro 5)
The boot drive is an internal SATA 250 Gig Drive. This is where the Final Cut Application is.
Our scratch disk is a RAID using 6 external SATA drives controlled by a Tempo card. A Blackmagic Speed test returned 377 MB/sec read and 376 MB/sec write on these drives, so I don't think it's a bandwith issue. Drives are formatted without Journalling enabled.
All drives are new, optimized, and have been verified by Diskwarrior and Apple's Disk Utility.
I have also checked that each of the High performance PCI cards is in the right slot to optimize performance.
Things I've thought about but would like some input-
Is there a software cap that I haven't turned off?
Do I need to set up the Final Cut Application on the RAID Drive? (For quicker access to, say, preference files)
Could this be a symptom of a corrupt preference file?
Powermac G5 Dual 2.3 Ghz Mac OS X (10.4.3)

Welcome to the Forum.
I am sure you will be able to work at full throttle very soon. If my suggestion does not help I am sure someone will recognize your issue.
My suggestion is based on seeing pretty much what you describe in someone else's system and so I am offering the fix that worked.
The scenario you describe may reflect the operation of another application that is as hungry for "bandwith" and space as FCP. If you haven't, try turning Spotlight off. I also suggest that you trash the FCP preferences and repair permissions The last two can do no harm.

Very poor 802.11n performance

I'm having difficulties with my time capsule. The performance seems very erratic. Due to me having also having a powerbook I've so far run it in compatible mode.
But the many problems regarding signal strength and a stable throughput struggling to keep above 485 kb/s prompted me to move the Time Capsule closer to the Powerbook so I could hook it up via cable and completely switch to 802.11n 5ghz, connceting the other computers wirelessly.
Unfortunately, it doesn't work. The performance is laughable, I get a mere 5000 kb/s down (internet based test) whereas I normally (2.4 ghz n/b/g compatibel) i get just under 2 MB/s.
Sending files to and from a connected harddrive is also very very very slow.
What is wrong with the Time Capsule? Is it interference from the (bastards) around me that all have their routers setup to automatically chose channel?
Is my time capsule broken? Is my computer broken? What is wrong?
I'm close to returning the device.

I've just completed an experiment.
Two iMacs side-by-side. One with Airport Utility 5.4.1 ("new"), second with Airport Utility 5.3.1 ("old"). Time Capsule with firmware 7.4.1.
Initial tests for connection Rate:
"New" average about 122
"Old" average about 232 (about twice the Rate)
Installed Airport Utility 5.4.1 on "old" iMac.
New tests for connection Rate:
Both averaging about 116
To me this suggests an effect of the "upgrade" to 5.4.1. But could this be the case? I'm not going to downgrade the firmware quite yet until I rule this and any interference issues out.

Very poor video podcast performance

Computer is older (P3/1000, ATI 9550 video@1280x1024, Win2K, Quicktime 7.1.5.) Yes, I am looking at getting a new computer this summer, after some of the Vista issues are more settled.
I am having major issues trying to play simple video podcasts. Most of these are only 128K, such as Vintage Toons. Playing them results in 90%+ CPU, and only if I keep it original size and only play it directly in Quicktime player or RealPlayer. Playing them in iTunes is impossible, as iTunes itself is a major CPU hog. Doing most anything causes the video to freeze and sputter and even disappear. RealPlayer works best (I can even move the video around while playing without it stopping!) I can't play anything full-screen cleanly.
Quicktime is set to use DirectX, and Windows and DirectX are up to date. The video drivers are Catalyst 5.8. I don't think there is anything in the newer Catalyst drivers that will do much for an entry-level card like this.
This seems to have gotten MUCH worse with the latest iTunes/Quicktime upgrade.
I can play much higher bitrate (1M+) Windows Media files with few if any glitches.
Windows 2000

Most new QuickTime files use H.264 Video codec which cause a strain on older machines and graphic cards (and drivers).
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You may be able to mitigate performance issues by setting QuickTime Preferences to not use DirectX (QuickTime Control Panel).

ZBook 17 g2 - poor DPC Latency performance when running from z Turbo Drive PCIe SSD

I'm setting up a new zBook 17 g2 and am getting very poor DPC latency performance (> 6000 us) when running from the PCIe SSD. I've re-installed the OS (Win 7 64 bit) on both the PCIe SSD and a SATA HDD and the DPC latency performance is fine when running from the HDD (50 - 100 us) but horrible when running from the PCIe SSD (> 6000 us). I've updated the BIOS and tried every combination of driver and component enabling/disabling I can think of. The DPC latency is extremely high from the initial Windows install with no drivers installed. Adding drivers seems to have no effect on the DPC latency. Before purchasing the laptop I found this review: http://www.notebookcheck.net/Review-HP-ZBook-17-E9X11AA-ABA-Workstation.106222.0.html where the DPC latency measurement (middle of the page) looks OK. Of course, this is the prior version of the laptop and I believe it does not have the PCIe SSD. Combining that with the fact that I get fine performance when running from the HDD I am led to believe that the PCIe SSD is the cause of the problem. Has anyone found a solution to this problem? As it stands right now my zBook is not usable for digital audio work when running from the PCIe SSD. But it cost me a lot of money so I'd sure like to use it...! Thanks, rgames

Hi mooktank, No solution yet but, as of about six weeks ago, HP at least acknowledged that it's a problem (finally). I reproduced it perfectly on another zBook 17 g2 and another PCIe SSD in the same laptop and HP was able to reproduce the problem as well. So the problem is clearly in the BIOS or with some driver related to the PCIe SSD. It could also be with the firmware in the drive, itself, but I can't find any other PCIe drives in the 60 mm form factor. So there's no way to see if a differnt type of drive would fix the problem. My suspicion is that it's related to the PCIe sleep states - those are known to cause exactly these types of problems because the drive takes quick "naps" to save power and there's a delay when it is told to wake back up. That delay causes a delay in the audio buffer that results in pops/crackles/stutters that would never be noticed doing other tasks like video editing or CAD work . So it's a problem specific to folks who need low-latency audio performance (very few apps require low latency audio - video editing, for example, uses huge buffers with relatively high latency). A lot of desktops offer a BIOS option to disable those sleep states but no such option exists in HP's BIOS for that laptop. In theory you can do it from within Windows but it doesn't have an effect on my system. That might be one of those options that Windows allows you to change but that actually has no effect. One workaround is to disable CPU throttling. That makes the CPU run at full speed all the time and, I believe, also disables the PCIe and other sleep states. When I disable CPU throttling, DPC latency goes back to normal. However, the CPU is then running full-speed all the time so your battery life basically goes to nothing and the laptop gets *very* hot. Clearly that is not necessary because the laptop runs fine from the SATA SSD. HP needs to fix the latency problem associated with the PCIe drive. The next logical step is to provide a BIOS update that provides a way to disable the PCIe sleep states without disabling CPU throttling, like on many desktop systems. The bad news is that HP tech support is not very technical, so it takes forever for them to figure out what I'm talking about. It took a couple months for them to start using the DPC Latency checker. Hopefully there will be a fix at some point... in the meantime, I hope that HP sends me a check for spending so much time educating their techs on how computers work. And for countless hours lost re-installing different OSes only to show that the performance is exactly the same as shown in the DPC Latency checker. rgames

Very poorly MacBook Pro, Can you help please?

I have recently ungrade my Macbook pro to OS Lion (about 3 weeks ago) it has been running with no problems. Two days ago it started running very slow, slow to start up (up to 14 mins!) and slow to load app and web pages. I checked CPU useage and mdworker was using lots of power. On the advice I found somewhere on here I made another user and deleted the previous one and all seemed to be ok for a few hours. However the MacBook started to slow up again, although the CPU seemed to be ok this time. I made a USB Lion recovery disc as per the apple support and verified the disc (and repaired it too just in case) all was ok and it reported no problems... Macbook still very poorly however so I thought maybe reinstalling OS Lion and starting again might solve the problem... But now it's stuck on the apple start up screen with the spinning wheel, running the fan and getting very hot. I have turned it off and periodicaly back on again to see if it will sort itself out :-(
Any help advice on what to do next greatly appreicated.
Many thanks

If you're selling or giving away the computer, throw any files which may contain sensitive data in the Trash and securely empty it.
Restart from the computer's original disks(or the recovery partition if it originally shipped with Mac OS X 10.7 or newer), use the Disk Utility to erase the drive, and install a new OS.
(76411)

Macbook pro performing very poor due to Yosemite

Hi,
I bought macbook pro 2012 model just 10 days back. Unfortunately i got yosemite preinstalled. My macbook pro is performing very very poor now .. Please help me in this regard
Problem description:
Very slow performance
EtreCheck version: 2.1.5 (108)
Report generated 12 January 2015 8:06:38 pm IST
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
MacBook Pro (13-inch, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro9,2
1 2.5 GHz Intel Core i5 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 4000
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10.1 (14B25) - Uptime: 3 days 1:6:20
Disk Information: ℹ️
APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / : 498.89 GB (428.37 GB free)
Core Storage: disk0s2 499.25 GB Online
HL-DT-ST DVDRW GS41N
USB Information: ℹ️
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. FaceTime HD Camera (Built-in)
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Configuration files: ℹ️
/etc/hosts - Count: 6
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Library/Extensions
[loaded] com.driver.LogJoystick (2.0 - SDK 10.9) [Support]
[loaded] com.logitech.driver.LogiGamingMouseFilter (1 - SDK 10.9) [Support]
Startup Items: ℹ️
MySQLCOM: Path: /Library/StartupItems/MySQLCOM
Startup items are obsolete in OS X Yosemite
Problem System Launch Agents: ℹ️
[killed] com.apple.bird.plist
[killed] com.apple.CallHistoryPluginHelper.plist
[killed] com.apple.CallHistorySyncHelper.plist
[killed] com.apple.cloudd.plist
[killed] com.apple.coreservices.appleid.authentication.plist
[killed] com.apple.EscrowSecurityAlert.plist
[killed] com.apple.icloud.fmfd.plist
[killed] com.apple.nsurlsessiond.plist
[killed] com.apple.pluginkit.pkd.plist
[killed] com.apple.rcd.plist
[killed] com.apple.recentsd.plist
[killed] com.apple.sbd.plist
[killed] com.apple.scopedbookmarkagent.xpc.plist
[killed] com.apple.security.cloudkeychainproxy.plist
[killed] com.apple.spindump_agent.plist
15 processes killed due to memory pressure
Problem System Launch Daemons: ℹ️
[killed] com.apple.AssetCacheLocatorService.plist
[killed] com.apple.awdd.plist
[killed] com.apple.corestorage.corestoragehelperd.plist
[killed] com.apple.ctkd.plist
[killed] com.apple.diagnosticd.plist
[killed] com.apple.emond.aslmanager.plist
[killed] com.apple.icloud.findmydeviced.plist
[killed] com.apple.ifdreader.plist
[killed] com.apple.nehelper.plist
[killed] com.apple.nsurlsessiond.plist
[killed] com.apple.periodic-daily.plist
[killed] com.apple.periodic-weekly.plist
[killed] com.apple.softwareupdate_download_service.plist
[killed] com.apple.spindump.plist
[killed] com.apple.systemstats.analysis.plist
[killed] com.apple.wdhelper.plist
16 processes killed due to memory pressure
Launch Agents: ℹ️
[not loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[not loaded] com.teamviewer.teamviewer.plist [Support]
[not loaded] com.teamviewer.teamviewer_desktop.plist [Support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.teamviewer.Helper.plist [Support]
[not loaded] com.teamviewer.teamviewer_service.plist [Support]
User Launch Agents: ℹ️
[loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[loaded] com.google.keystone.agent.plist [Support]
[loaded] com.valvesoftware.steamclean.plist [Support]
User Login Items: ℹ️
Android File Transfer Agent Application (/Users/[redacted]/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)
Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 16.0.0.235 - SDK 10.6 [Support]
Flash Player: Version: 16.0.0.235 - SDK 10.6 [Support]
QuickTime Plugin: Version: 7.7.3
AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 [Support]
Default Browser: Version: 600 - SDK 10.10
Safari Extensions: ℹ️
Searchme [Cached] Adware! [Remove]
3rd Party Preference Panes: ℹ️
Flash Player [Support]
MySQL [Support]
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
      5% WindowServer
      0% fontd
      0% smcFanControl
      0% AppleSpell
      0% Google Chrome
Top Processes by Memory: ℹ️
408 MB com.apple.SpeechRecognitionCore.speechrecognitiond
133 MB Google Chrome
120 MB Skype
86 MB loginwindow
77 MB Pages
Virtual Memory Information: ℹ️
51 MB Free RAM
1.30 GB Active RAM
1.22 GB Inactive RAM
773 MB Wired RAM
45.09 GB Page-ins
646 MB Page-outs
Diagnostics Information: ℹ️
Jan 12, 2015, 01:11:20 PM /Users/[redacted]/Library/Logs/DiagnosticReports/httpd_2015-01-12-131120_[redac ted].crash
Jan 12, 2015, 01:06:00 PM /Users/[redacted]/Library/Logs/DiagnosticReports/httpd_2015-01-12-130600_[redac ted].crash
Jan 11, 2015, 11:11:16 PM /Users/[redacted]/Library/Logs/DiagnosticReports/httpd_2015-01-11-231116_[redac ted].crash
Jan 11, 2015, 11:09:03 PM /Users/[redacted]/Library/Logs/DiagnosticReports/httpd_2015-01-11-230903_[redac ted].crash

Before buying a second-hand computer, you should have run Apple Diagnostics or the Apple Hardware Test, whichever is applicable.
The first thing to do after buying the computer is to erase the internal drive and install a clean copy of OS X. You—not the original owner—must do that. Changes made by Apple over the years have made this seemingly straightforward task very complex.
How you go about it depends on the model, and on whether you already own another Mac. If you're not sure of the model, enter the serial number on this page. Then find the model on this page to see what OS version was originally installed.
It's unsafe, and may be unlawful, to use a computer with software installed by a previous owner.
1. If you don't own another Mac
a. If the machine shipped with OS X 10.4 or 10.5, you need a boxed and shrink-wrapped retail Snow Leopard (OS X 10.6) installation disc from the Apple Store or a reputable reseller—not from eBay or anything of the kind. If the machine is very old and has less than 1 GB of memory, you'll need to add more in order to install 10.6. Preferably, install as much memory as it can take, according to the technical specifications.
b. If the machine shipped with OS X 10.6, you need the installation media that came with it: gray installation discs, or a USB flash drive for a MacBook Air. You should have received the media from the original owner, but if you didn't, order replacements from Apple. A retail disc, or the gray discs from another model, will not work.
To start up from an optical disc or a flash drive, insert it, then restart the computer and hold down the C key at the startup chime. Release the key when you see the gray Apple logo on the screen.
c. If the machine shipped with OS X 10.7 or later, you don't need media. It should start up in Internet Recovery mode when you hold down the key combination option-command-R at the startup chime. Release the keys when you see a spinning globe.
d. Some 2010-2011 models shipped with OS X 10.6 and received a firmware update after 10.7 was released, enabling them to use Internet Recovery. If you have one of those models, you can't reinstall 10.6 even from the original media, and Internet Recovery will not work either without the original owner's Apple ID. In that case, contact Apple Support, or take the machine to an Apple Store or another authorized service provider to have the OS installed.
2. If you do own another Mac
If you already own another Mac that was upgraded in the App Store to the version of OS X that you want to install, and if the new Mac is compatible with it, then you can install it. Use Recovery Disk Assistant to prepare a USB device, then start up the new Mac from it by holding down the C key at the startup chime. Alternatively, if you have a Time Machine backup of OS X 10.7.3 or later on an external hard drive (not a Time Capsule or other network device), you can start from that by holding down the option key and selecting it from the row of icons that appears. Note that if your other Mac was never upgraded in the App Store, you can't use this method.
3. Partition and install OS X
a. If you see a lock screen when trying to start up from installation media or in Recovery mode, then a firmware password was set by the previous owner, or the machine was remotely locked via iCloud. You'll either have to contact the owner or take the machine to an Apple Store or another service provider to be unlocked. You may be asked for proof of ownership.
b. Launch Disk Utility and select the icon of the internal drive—not any of the volume icons nested beneath it. In the Partition tab, select the default options: a GUID partition table with one data volume in Mac OS Extended (Journaled) format. This operation will permanently remove all existing data on the drive.
c. An unusual problem may arise if all the following conditions apply:
          OS X 10.7 or later was installed by the previous owner
          The startup volume was encrypted with FileVault
          You're booted in Recovery mode (that is, not from a 10.6 installation disc)
In that case, you won't be able to unlock the volume or partition the drive without the FileVault password. Ask for guidance or see this discussion.
d. After partitioning, quit Disk Utility and run the OS X Installer. If you're installing a version of OS X acquired from the App Store, you will need the Apple ID and password that you used. When the installation is done, the system will automatically restart into the Setup Assistant, which will prompt you to transfer the data from another Mac, its backups, or from a Windows computer. If you have any data to transfer, this is usually the best time to do it.
e. Run Software Update and install all available system updates from Apple. To upgrade to a major version of OS X newer than 10.6, get it from the Mac App Store. Note that you can't keep an upgraded version that was installed by the original owner. He or she can't legally transfer it to you, and without the Apple ID you won't be able to update it in Software Update or reinstall, if that becomes necessary. The same goes for any App Store products that the previous owner installed—you have to repurchase them.
4. Other issues
a. If the original owner "accepted" the bundled iLife applications (iPhoto, iMovie, and Garage Band) in the App Store so that he or she could update them, then they're irrevocably linked to that Apple ID and you won't be able to download them without buying them. Reportedly, Mac App Store Customer Service has sometimes issued redemption codes for these apps to second owners who asked.
b. If the previous owner didn't deauthorize the computer in the iTunes Store under his Apple ID, you wont be able to authorize it immediately under your ID. In that case, you'll either have to wait up to 90 days or contact iTunes Support.
c. When trying to create a new iCloud account, you might get a failure message: "Account limit reached." Apple imposes a lifetime limit of three iCloud account setups per device. Erasing the device does not reset the limit. You can still use an iCloud account that was created on another device, but you won't be able to create a new one. Contact iCloud Support for more information. The setup limit doesn't apply to Apple ID accounts used for other services, such as the iTunes and Mac App Stores, or iMessage. You can create as many of those accounts as you like.

Apex report performance is very poor with apex_item.checkbox row selector.

Hi,
I'm working on a report that includes some functionality to be able to select multiple records for further processing.
The report is based on a view that contains a couple of hundred thousand records.
When i make a selection from this view in sqlplus , the performance is acceptable but the apex report based on the same view performes very poorly.
I've noticed that when i omit the apex_item.checkbox from my report query, performance is on par with sqlplus. (factor 10 or so quicker).
Explain plan appears to be the same with or without checkbox function in the select.
My query is:
select apex_item.checkbox(1,tan_id) Select ,
brt_id
, tan_id
, message_id
, conversation_id
, action
, to_acn_code
, information
, brt_created
, tan_created
from (SELECT brt.id brt_id, -- view query
MAX (TAN.id) tan_id,
brt.message_id,
brt.conversation_id,
brt.action,
TAN.to_acn_code,
TAN.information,
brt.created brt_created,
TAN.created tan_created
FROM (SELECT brt_id, id, to_acn_code, information, created
FROM xxcjib_transactions
WHERE tan_type = 'DELIVER' AND status = 'FINISHED') TAN,
xxcjib_berichten brt
WHERE brt.id = TAN.brt_id
GROUP BY brt.id,
brt.message_id,
brt.conversation_id,
brt.action,
TAN.to_acn_code,
TAN.information,
brt.created,
TAN.created)
What could be the reason for the poor performance of the apex report?
And is there another way to select multiple report records without the apex_item.checkbox function?
I'm using apex 3.2 on oracle 10g database.
Thanks,
Niels Ingen Housz
Edited by: user11986529 on 19-mrt-2010 4:06

Thanks for your reply.
Unfortunately changing the pagination doesnt make much of a difference in this case.
Without the checkbox the query takes 2 seconds.
With checkbox it takes well over 30 seconds.
The second report region on this page based on another view seems to perform reasonably well with or without the checkbox.
It has about the same number of records but with a different view query.
There are also a couple of filter items in the where clause of the report queries (same for both reports) based on date and acn_code and both reports have a selectlist item displayed in their regions based on a simple lov. These filter items don't seem to be of influence on the performance.
I have also recreated the report on a seperate page without any other page items or where clause and the same thing occurs.
With the checkbox its very very slow (more like 20 times slower).
Without it , the report performs well.
And another thing, when i run the page with debug on i don't see the actual report query:
0.08: show report
0.08: determine column headings
0.08: activate sort
0.08: parse query as: APEX_CMA_ONT
0.09: print column headings
0.09: rows loop: 30 row(s)
and then the region is displayed.
I am using databaselinks in the views b.t.w
Edited by: user11986529 on 19-mrt-2010 7:11

Macbook Pro 11,2 tests very poor WiFi performance compared to iPad

Configuration:
MBP 11,2 running 10.10.1
Airport Express 2014 vintage
WiFi Scanner.app speed test results on MBP range from 1 to 3 Mbps. My iPad Air (or iPad Mini) in the same physical position tests between 18 and 28 Mbps. WiFi Scanner.app shows SNR of 17 to 18 dbm.
The reason I am testing is because I have noticed network performance on the new MBP to be very poor in our current NZ location. In Palo Alto 2 weeks ago the MBP wifi seemed fine - I didn't bother to test.
Any suggestions would be much appreciated!

Hello .Sup,
Thanks for using Apple Support Communities.
To troubleshoot the Wi-Fi performance on your iPad please follow the troubleshooting steps in the article below. Also take a look at the recommended settings for Wi-Fi routers.
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/TS1398
iOS and OS X: Recommended settings for Wi-Fi routers and access points
http://support.apple.com/kb/HT4199
Take care,
Alex H.

URGENT: Migrating from SQL to Oracle results in very poor performance!

*** IMPORTANT, NEED YOUR HELP ***
Dear, I have a banking business solution from Windows/SQL Server 2000 to Sun Solaris/ORACLE 10g migrated. In the test environment everything was working fine. On the production system we have very poor DB performance. About 100 times slower than SQL Server 2000!
Environment at Customer Server Side:
Hardware: SUN Fire 4 CPU's, OS: Solaris 5.8, DB Oracle 8 and 10
Data Storage: Em2
DB access thru OCCI [Environment:OBJECT, Connection Pool, Create Connection]
Depending from older applications it's necessary to run ORACLE 8 as well on the same Server. Since we have running the new solution, which is using ORACLE 10, the listener for ORACLE 8 is frequently gone (or by someone killed?). The performance of the whole ORACLE 10 Environment is very poor. As a result of my analyse I figured out that the process to create a connection to the connection pool takes up to 14 seconds. Now I am wondering if it a problem to run different ORACLE versions on the same Server? The Customer has installed/created the new ORACLE 10 DB with the same user account (oracle) as the older version. To run the new solution we have to change the ORACLE environment settings manually. All hints/suggestions to solve this problem are welcome. Thanks in advance.
Anton

On the production system we have very poor DB performanceHave you identified the cause of the poor performance is not the queries and their plans being generated by the database?
Do you know if some of the queries appear to take more time than what it used to be on old system? Did you analyze such queries to see what might be the problem?
Are you running RBO or CBO?
if stats are generated, how are they generated and how often?
Did you see what autotrace and tkprof has to tell you about problem queries (if in fact such queries have been identified)?
http://download-west.oracle.com/docs/cd/B14117_01/server.101/b10752/sqltrace.htm#1052

After enabling rewrite proxy -- performance very very poor

Hi,
I have installed Gateway on different machine and Protal server with rewriter on another machine.
Wihtout rewriter proxy (10443) , the application was working very fast when I access through internet.
After enabling rewriter proxy , the performance is very very poor. When I access the application from internet its taking 2 minutes to show the login page then for validation 3 minutes its taking.
Could you please help me on this
Thanks in Advance

My ISP is Speakeasy. (I'm in the process of switching to AT&T, though.)
The only model number on the unit is WRT330N, so I'm not sure what other model number you mean. (Do you mean the FCC number, which is Q87-WRT330N? Or do you mean the serial number?)
I'm running firmware version 1.00.4, which appears to be the latest version. And my main computers are running Mac OS X.

Very poor network performance with a G4

I have a white & grey G4 (1.25GHz and 256MB) running OS X 10.4.5. It's exhibiting very poor network performance, e.g. it will not FTP files over a LAN at more than about 40KB/second.
Other nodes on the same switch perform fine, as do other ports on the switch. The machine is set to autodetect for speed & duplex, so my question is -- how do I debug this? I've tried swapping network cables already...
Thanks!
Chris

This came down to an incompatibility between the G4 and the Cisco. When the switch is set to force 100Mbit but negotiate duplex, the G4 doesn't like it. Going back to auto speed & duplex fixed the problem...

MSI GE70 2OE-015NL very poor performance on battery power

Hey guys,
First of all I want to say that I'm really happy with my GE70 notebook. Everything works perfectly fine except for this one thing... When I play games on the notebook while on battery power, the performance is very poor. For example when I normally on AC power get around 250 FPS, it drops down all the way to around 40-60 FPS on battery power. In real demanding games this can be very annoying, since I have to play on AC power constantly for games like Battlefield 4. Although this isn't really a problem for me most of the time, I just don't think that's the concept of a notebook... I monitored some statistics using MSI Afterburner and I noticed that the GPU's core clock is clocked all the way down to a constant 135MHz whilst gaming and the memory is clocked all the way down to around 400MHz. I'm using a GTX 765M. I've already tried changing settings in the Windows power settings, the NVIDIA control panel and I even looked into the BIOS, but I couldn't find a solution to this problem. Apparently the GTX 700M series GPUs support Optimus technology which should give a decent battery life using the full power of your GPU, but for me it doesn't do so. The battery gets drained in around 45 minutes while gaming on very poor performance. I hope you guys can help me out!

Oyo,
All Gamer NB are not done for play in battery mode, battery life are short and the power provide by a battery are far from the power adapter, this mean the NB get less power and your CPU and VGA are working in lower mode = lower result.
This is normal because link to the battery, thepower adapter provide 120W, the battery 49W, you see the gap between them ^^
So for play games, use the power adapter and the battery together, this is the best way.

Very poor performance Windows RT with Citrix

Hi All,
I'm currently in a project with a customer implementing XenApp 7.6. The customer uses Dell XPS 10 tablets with Windows RT installed. We have installed the latest Receiver from the Microsoft Store and added a connection through a Citrix NetScaler Gateway
VPX version 10.5.
The user experience on the tablet is very very poor. This is extreme when browsing using Internet Explorer 11. On a normal Windows 8 client or a thin client with WES2009 the experience is good.
Besides the bad performance there's also a problem with the home/start button on the remote OS (Windows Server 2012 R2). The button isn't working or only after multiple tries.
This experience is also on a windows 8.1/10 machine with the Citrix Receiver from the store.
Any thoughts about the issue's above? What can we do to optimize the environment for working with the Citrix Receiver from the store?
Kind Regards,
René
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I would recommend turning to Citrix to get support on this. After all it's their product!
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