iMac mid2014 work much slower after upgrade of sierra

Similar Questions

• Safari WAY slow after upgrade of Sierra?

  I have a MacBook Pro 13 inch, early 2011. I have always updated for the last OS by releasing.

  I installed Sierra today, no problem with the installation. The only problem I found is that Safari runs at a GLACIAL pace. I can't even do a speedtest because it times out (it is not my ISP, speed test on iPhone is good).

  Also has anyone seen this problem? Thanks in advance.

  Paul J.

  You can try to clear the cache and disable all extensions and modules. Restart Safari and go from there.

• Projector does not work after upgrade from Sierra

  My projector does not work after upgrade to Sierra. Or search in Outlook (I use outlook for Mac due to having MS 365 for labour) or the search function in the finder. I use this all the time and need this feature back. I tried to reindex spotlight and nothing. Anyone has any ideas.

  Try to rebuild Spotlight rebuild the Spotlight to your Mac - Apple Support index

• Photostream not working after upgrade to Sierra

  I noticed after upgrading to Sierra, that my photo stream on the Macbook no longer works.

  When I connect to www.icloud.com I see that there are new photos downloaded from my iPhone to the iCloud, but not to my Macbook, no news pictures showed in Photos on my Mac. I tried login/out my iCloud on the Macbook and the iPhone account, but nothing has changed.

  Any ideas on how to solve this problem?

  Start by providing details

  What are your parameters to iCloud every IOS device on your Mac and if you use iCloud library what his status on each device

  Your message is confusing - you cannot see or access MyPhotoStream on the icloud.com - on iCloud.com/Photos see you iCloud photo library photos only - and if a device has not finished to upload to ICPL it downloads pictures

  So to help, we need to know what services you are using and what their status is

  LN

• Several Kernel Panic after upgrade from Sierra

  Hi guys,.

  I had on my MacBook 2016 multiple kernel panic after upgrade to Sierra, happens every time I open it or waking from sleep:

  Anonymous UUID: 8B8CA0BE-7043-8C53-656A-BA768C67E094

  Sat Sep 24 08:14:08 2016

  Panic report *.

  panic (cpu 0 0xffffff7f96cac415 appellant): "reinit@26=PCIeCfgRdFailed{LnkSt=FFFFFFFF,DevSt=FFFFFFFF,VID=FFFF,DID=FFFF,STS_ CMD=FFFFFFFF,BAR0=FFFFFFFF,BAR1=FFFFFFFF,US=FFFF"@/BuildRoot/Library/Caches/com apple.xbs/Sources/AirPortDriverBrcm4360/AirPortDriverBrcm4360-1100.37.1.16/src/s hared. / macosx_osl.cpp:1999.

  Backtrace (CPU 0), frame: return address

  0xffffff9121f735c0: 0xffffff80154f748c

  0xffffff9121f73640: 0xffffff7f96cac415

  0xffffff9121f736c0: 0xffffff7f96cb15c1

  0xffffff9121f73790: 0xffffff7f96cab6ca

  0xffffff9121f737d0: 0xffffff7f96f87720

  0xffffff9121f73820: 0xffffff7f96f7fe95

  0xffffff9121f73860: 0xffffff7f96d6c6b8

  0xffffff9121f73870: 0xffffff7f96d66d25

  0xffffff9121f738b0: 0xffffff7f96d66994

  0xffffff9121f73930: 0xffffff7f96cb0fa2

  0xffffff9121f73a30: 0xffffff7f96cb15b7

  0xffffff9121f73b00: 0xffffff7f96cab6ca

  0xffffff9121f73b40: 0xffffff7f96f87670

  0xffffff9121f73b90: 0xffffff7f96d584b2

  0xffffff9121f73bd0: 0xffffff7f96e02928

  0xffffff9121f73c00: 0xffffff7f96cf6f2b

  0xffffff9121f73c30: 0xffffff7f96f4824f

  0xffffff9121f73c60: 0xffffff7f96dd393f

  0xffffff9121f73cb0: 0xffffff7f96cbbfb8

  0xffffff9121f73d80: 0xffffff7f96cb8196

  0xffffff9121f73db0: 0xffffff8015ac00ba

  0xffffff9121f73e20: 0xffffff7f96cbb824

  0xffffff9121f73e60: 0xffffff8015aa714b

  0xffffff9121f73ee0: 0xffffff8015aa6efa

  0xffffff9121f73f00: 0xffffff801552edea

  0xffffff9121f73fb0: 0xffffff80154a6af7

  Extensions of core in backtrace:

  com.apple.driver.AirPort.Brcm4360 (1100.37.1a16) [C7639630 - B474 - 3DAD - BD3E - 8BEE4D0 D1706]@0xffffff7f96c9c000-> 0xffffff7f97458fff]

  dependency: com.apple.driver.corecapture (1.0.4) [FEB510C7-BFC6-3721-8143-476E4EB62788] @ fff7f96b72000 0xfff

  dependency: com.apple.driver.mDNSOffloadUserClient (1.0.1b8) [DFE569DA-088F-3773 - 95A 7 - 1C98F4E 80CEF]@0xffffff7f96ba4000

  dependency: com.apple.iokit.IO80211Family (1200.12.2) [11F0AC73-496B-349F-81BE-3D1BE4C45234] @ 0xffffff7f96bac000

  dependency: com.apple.iokit.IOPCIFamily (2.9) [731443D8-78D5-30C8-939A-1ED3E857CA22] @ 7f95d32000 0xffffff

  dependency: (3.2) com.apple.iokit.IONetworkingFamily [6326DB88-5330-3F0C-91F6-D478AB5E7503] @0 xffffff7f96265000

  Corresponding to the current thread BSD process name: kernel_task

  Mac OS version:

  A 16, 323

  Kernel version:

  16.0.0 Darwin kernel version: Mon Aug 29 17:56:20 PDT 2016; root:XNU-3789.1.32~3/RELEASE_X86_64

  Kernel UUID: 622D2470-C34D-31F9-A62B-6AA9A3C6A3CD

  Slide kernel: 0 x 0000000015200000

  Text of core base: 0xffffff8015400000

  Text __HIB base: 0xffffff8015300000

  Name of system model: MacBook9, 1 (Mac-9AE82516C7C6B903)

  Availability of the system in nanoseconds: 43351242685

  last load kext to 6254093706: com.apple.filesystems.autofs 3.0 (addr 0xffffff7f97663000 size 45056)

  kexts responsible:

  com Apple.filesystems.autofs 3.0

  com.apple.driver.AudioAUUC 1.70

  com.apple.driver.AppleHWSensor 1.9.5d0

  com.apple.driver.AGPM 110.23.7

  com.apple.driver.ApplePlatformEnabler 2.7.0d0

  com.apple.driver.X86PlatformShim 1.0.0

  com.apple.driver.AppleOSXWatchdog 1

  com.apple.driver.AppleGraphicsDevicePolicy 3.13.60

  com.apple.driver.AppleUpstreamUserClient 3.6.4

  com.apple.driver.AppleHDAHardwareConfigDriver 276.26

  com.apple.driver.AppleHDA 276.26

  com.apple.driver.AppleIntelPCHPMC 1.1

  com.apple.driver.AppleIntelSKLGraphics 10.1.8

  com Apple.Driver.pmtelemetry 1

  com.apple.iokit.IOUserEthernet 1.0.1

  com.apple.iokit.IOBluetoothSerialManager 5.0.0f18

  com.apple.Dont_Steal_Mac_OS_X 7.0.0

  com.apple.driver.AppleHV 1

  com.apple.driver.AppleIntelSKLGraphicsFramebuffer 10.1.8

  com.apple.driver.AppleSMCLMU 208

  com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

  com.apple.driver.AppleCameraInterface 5.57.0

  com.apple.driver.AppleFIVRDriver 4.1.0

  com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0

  com.apple.driver.AppleMuxControl 3.13.60

  com.apple.driver.AppleBacklight 170.9.10

  com.apple.driver.AppleMCCSControl 1.2.13

  com.apple.driver.CoreStorageFsck 540

  com.apple.driver.AppleFileSystemDriver 3.0.1

  com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

  com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0

  com.apple.BootCache 39

  com Apple.filesystems.HFS.kext 366.1.1

  com.apple.driver.AppleTopCaseHIDEventDriver 102

  com.apple.driver.AirPort.Brcm4360 1100.37.1a16

  com.apple.driver.AppleSmartBatteryManager 161.0.0

  com.apple.driver.AppleACPIButtons 5.0

  com.apple.driver.AppleRTC 2.0

  com.apple.driver.AppleSMBIOS 2.1

  com.apple.driver.AppleACPIEC 5.0

  com.apple.driver.AppleAPIC 1.7

  com Apple.NKE.applicationfirewall 171

  com Apple.Security.Quarantine 3

  com.apple.security.TMSafetyNet 8

  com Apple.kext.Triggers 1.0

  com.apple.driver.DspFuncLib 276.26

  com.apple.kext.OSvKernDSPLib 525

  com.apple.iokit.IOBluetoothHostControllerUARTTransport 5.0.0f18

  com.apple.iokit.IOBluetoothHostControllerTransport 5.0.0f18

  com.apple.driver.AppleHDAController 276.26

  com.apple.iokit.IOHDAFamily 276.26

  com.apple.iokit.IOAudioFamily 205.11

  com.apple.vecLib.kext 1.2.0

  com.apple.iokit.IOSurface 152

  com.apple.iokit.IOBluetoothFamily 5.0.0f18

  com.apple.AppleGraphicsDeviceControl 3.13.60

  com.apple.iokit.IOAcceleratorFamily2 288.13

  com.apple.driver.AppleSMBusPCI 1.0.14d1

  com.apple.driver.IOPlatformPluginLegacy 1.0.0

  com.apple.driver.X86PlatformPlugin 1.0.0

  com.apple.driver.IOPlatformPluginFamily 6.0.0d8

  com.apple.driver.AppleIntelLpssUARTv1 3.0.60

  com.apple.driver.AppleIntelLpssUARTCommon 3.0.60

  com.apple.iokit.IOSerialFamily 11

  com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0

  com.apple.driver.AppleGraphicsControl 3.13.60

  com.apple.driver.AppleBacklightExpert 1.1.0

  com.apple.iokit.IONDRVSupport 2.4.1

  com.apple.driver.AppleSMC 3.1.9

  com.apple.driver.AppleSMBusController 1.0.14d1

  com.apple.iokit.IOGraphicsFamily 2.4.1

  com.apple.iokit.IOSCSIArchitectureModelFamily 394

  com.apple.driver.CoreStorage 540

  com.apple.driver.AppleXsanScheme 3

  com Apple.filesystems.HFS.Encodings.kext 1

  com.apple.driver.AppleHIDKeyboard 197

  com.apple.driver.AppleMultitouchDriver 367,6

  com.apple.driver.AppleInputDeviceSupport 76.1

  com.apple.driver.AppleHSSPIHIDDriver 49

  com.apple.driver.AppleHSSPISupport 49

  com.apple.driver.AppleIntelLpssSpiController 3.0.60

  com.apple.iokit.IO80211Family 1200.12.2

  com.apple.driver.mDNSOffloadUserClient 1.0.1b8

  com.apple.iokit.IONetworkingFamily 3.2

  com Apple.Driver.corecapture 1.0.4

  com.apple.iokit.IONVMeFamily 2.1.0

  com.apple.driver.AppleHPM 3.0.8

  com.apple.iokit.IOThunderboltFamily 6.2.1

  com.apple.driver.AppleIntelLpssI2CController 3.0.60

  com.apple.driver.AppleIntelLpssDmac 3.0.60

  com.apple.driver.AppleIntelLpssI2C 3.0.60

  com.apple.driver.AppleIntelLpssGspi 3.0.60

  com.apple.driver.usb.AppleUSBXHCIPCI 1.1

  com.apple.driver.usb.AppleUSBXHCI 1.1

  com.apple.driver.usb.AppleUSBHostPacketFilter 1.0

  com.apple.iokit.IOUSBFamily 900.4.1

  com.apple.iokit.IOUSBHostFamily 1.1

  com.apple.driver.AppleEFINVRAM 2.1

  com.apple.driver.AppleEFIRuntime 2.0

  com.apple.driver.AppleBusPowerController 1.0

  com.apple.iokit.IOHIDFamily 2.0.0

  com.apple.iokit.IOSMBusFamily 1.1

  com Apple.Security.sandbox 300.0

  com.apple.kext.AppleMatch 1.0.0d1

  com.apple.driver.AppleKeyStore 2

  com.apple.driver.AppleMobileFileIntegrity 1.0.5

  com.apple.driver.AppleCredentialManager 1.0

  com.apple.driver.DiskImages 444

  com.apple.iokit.IOStorageFamily 2.1

  com.apple.iokit.IOReportFamily 31

  com.apple.driver.AppleFDEKeyStore 28.30

  com.apple.driver.AppleACPIPlatform 5.0

  com.apple.iokit.IOPCIFamily 2.9

  com.apple.iokit.IOACPIFamily 1.4

  com.apple.kec.Libm 1

  com Apple.KEC.pthread 1

  com Apple.KEC.corecrypto 1.0

  System profile:

  Bluetooth: Version 5.0.0f18, 3 services, 27 aircraft, 1 incoming serial ports

  Memory module: DIMM0/0 BANK, 4 GB, LPDDR3, 1867 MHz, 0x80CE, 0x4B33514634463430424D2D41474346202020

  Memory module: DIMM0/1 BANK, 4 GB, LPDDR3, 1867 MHz, 0x80CE, 0x4B33514634463430424D2D41474346202020

  USB device: USB 3.0 Bus

  Crush Bus:

  Model: MacBook9, 1, MB91.0154.B07 BootROM, 2 processors, Intel Core m5, 1.2 GHz, 8 GB, MSC 2.35f102

  Graphics card: Intel HD Graphics 515, 515, integrated Intel HD graphics card

  Network service: Wi - Fi, AirPort, en0

  Airport: spairport_wireless_card_type_airport_extreme (0x14E4, 0 x 158), Broadcom BCM43xx 1.0 (7.21.171.10.1a16)

  Hope someone can help with this,

  You are not alone in this. I had three panic the kernel after upgrade a MBP to Sierra 2015 - could not resolve it, then I returned to El Capitan.

• Flash player not working not not after upgrade to 11.2

  ENVIRONMENT:

  PC clean and kept clean by me (owner of the COMPUTER company)

  Windows XP Pro 32-bit SP3, Pentium 4 3.0, 4 GB of ram.

  Mozilla firefox 12.0, 32-bit (not marked as 64-bit, so I guess that 32-bit)

  HOSTORY:

  I have updated flash player on my PC as Flash asked me to upgrade.

  I upgraded to 11.2 (plugin version 11.2.202.235 and version activex or 10.3.185.5) about 2-4 days ago.

  I noticed after upgrading my web videos were not playing correctly (but at the same time as I had updated my a Netgear to a sonicwall router, so I thought that the problem is maybe there.

  After much online video plays do not, I went to the other PC where I have not being updated for flash 11.2 and tried the same videos and they worked. It is therefore obvious that my router is not the problem.

  Here is an example of a video which will be now. do not play on this specified PC but will play on my other PC

  http://News.Yahoo.com/video-failed-space-shuttle-launch-really-awkward-165629432--finance. HTML

  Do not play, I mean: the video will display the first image it loads. If I click on play it will look like it is buffering. But he might start to play from 1 to 3 seconds (with no sound) and then freeze for ever. If I click on pause and then play again, the progress bar downstairs will move forward in the film about 10 to 40% (apparently the jump depends on the delay between when I expect after the first second of 1 to 3 of the game, I press play and then later and pause buttons), then once again It will play a second or two without noise and even once be frozen forever.

  Adobe says here:

  http://helpx.Adobe.com/Flash-Player/KB/find-version-Flash-Player.html

  How to troubleshoot the flash. I went to the "flash player doesn't work/windows7" troubleshooting options.

  I've deleted all the flash player, data navigation, removed the cache of flash player disabled material acceleceration, and now I'm the report here.

  I guess I need restoration until adobe figures this out (Yes, I know what assume spells).

  This page told me how to uninstall and reinstall and some other options, but nowhere he told me how simply rollbacxk to the previous version, the whattever version it was, I don't know as I don't have it to follow the current version of flash when it works.

  PERSONAL NOTE: I HATE auto update crashing my stuff. This is the reason why I disable the automatic update and am more than happy to stay 2-20 versions behind until what I am forced to upgrade to do something, I want to work. But F'in adobe begins to turn aut update on every product it creates. I HATE this!

  Thanks for your time.

  JW

  Please provide as much information; I wish more users looking for help that would make!

  Unfortunately, I don't have a clear solution for the specific problem you see.  The video link you provided works great for me with Flash Player 11.2 on Firefox on Windows XP - SP3 and Windows 7 12.

  What I would try if it's the same for me:

  • Try a new installation by following the instructions in http://forums.adobe.com/thread/928315
  • to reinstall them using tall_in_a_firewall_proxy_server_environment http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#ins offline installers
  • If the above does not improve the situation, I would try if a graphics driver update changes anything; See http://forums.adobe.com/thread/945765 (but I'm sure you know how to update the drivers, with your background)
  • If everything fails, I would try a system restore to a date prior to the update of Flash Player; all PS files are in the C:\Windows\... records, so he should be back completely on the previous working version

  Or you could try a manual installation from a previous version of

  • using uninstaller http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html
  • then download and install the archived Flash Player appropriate to http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html

  PS in regards to the installers archived, you may need to disconnect from the Internet during the installation.  Some of the newer installers go and check the availability of new versions and refuse to continue if they find one.

  P.P.S. You can permanently disable auto-update using a mms.cfg file; See http://www.adobe.com/devnet/flashplayer/articles/flash_player_admin_guide.html

  Most of the information in this guide to the Director must make reference to the new silent update that are substantive, but it also works on the previous update of the FP.

• Yahoo Mail failure after upgrade of Sierra - iMac

  After the upgrade to Sierra... Now I find that I can't 'see' Yahoo mail... I tried to add the a/c: then the removal of the a/c. I get the Triangle of Hazzard indicating error account! I went down this loop for 2 days...

  All my other email accounts worked instantly. iCloud: Gmail etc.

  I tried to manually configure the settings...

  Everything seems 'normal'... but not a thing, no mail: no record... a real pain. the only joy that is web based too... If I can work...

  But, come on APPLE... This happens to my Yahoo mail whenever I update IOS... What is going on???

  I always seem to end up in a CHAT SESSION just to get my MAIL BASIC... This ISN'T a quality SERVICE...

  MAIL today, is a very basic service... Please, APPLE... issue a patch for us, the little guys

  Rant on.

  help, please, anyone...

  One user posted (Re: Sierra - Yahoo mail offline persistently) he has had success in choosing don't no Yahoo when you set up the account, but to choose the other and set up the details manually. You would like to try and see if it works for you.

• Time Machine does not work after upgrade to Sierra

  The Time Machine (TM) fail to start backup and there is still "preparing backup...". "for more than an hour. This right after upgrading to Mac OS Sierra.

  Another weird thing happens to the toolbar of the Mac Mail. The Junk button is replaced by another button. trying to put back in place, but remove the button become a button.

  Please help with the backup problem mentioned above. Thank you much in advance.

  How long have you waited? After a new installation, it must be a fair while even with a SSD to prepare the first backup due to the number of modified files.

  Make sure the TM drive is in the list of items excluded from Spotlight indexing. ICloud newsletter and other cloud services.

• Fans of fast and slow mail after upgrade of Sierra

  So I too just upgraded to Sierra, and I have two problems.  The first I noticed almost immediately after a reboot is something is causing fans to run almost non-stop.  I looked at the level of the console and I see that several root applications use more than 100% of the time CPU.  What the hell is happening here?

  Second, Mail has now slowed down to the point that it is almost unusable.  I click on an email and it will literally be anywhere from 15 to 20 seconds for the mail to open.  Not a complex HTML with email of old thing plain video simple.  What the hell is happening here?  It's maddening.

  John W

  After installation of a new OS, there is a lot of cleaning up to do, just wait until she finishes

• Safari slow after upgrade of the El Capitan, Hideme install

  Why is Safari slow after El Capitan upgraded, or would it be Hideme

  You described your own next troubleshooting step.  Disable your proxy/VPN for a direct connection to the Internet through your ISP and see if your slow disappears.

• Satellite 1800 working extremely slow after reinstallation of the operating system

  I bought a second hand Satellite 1800. I gathered all the drivers on the site of producer s, but when I formatted the HARD drive and installed Windows XP Home edition (my own copy, not any supplied software) the laptop works extremely slow... before that during the process of reading/writing of HARD drive, you could hear that typical for the sound... now the hard drive is completely silent during operation as it's slow as hell...

  I tried to keep up with the web and it turns out that if I reinstalled the OS to Toshiba Recovery CD, it should do the thing... never mind, I didn't know I should have this CD when I bought it... so now I don't... Is there anything I could do about it?
  Help, please

  Q.

  Hello

  As far as I know, this camera comes with W98SE and WME. The recovery CD with operating system Windows XP Home edition for this device is not created by Toshiba.

  You can install Windows XP Home edition and use all the drivers for the Toshiba download site. I don t know how much RAM use this device, but if the unit has less than 128 MB of RAM you can't wait the machine runs fast.

• Beats Audio Equalizer WORKS DO not after upgrade to Win 8.1

  Hi I have no model for the All - In - One HP ENVY 23:23 c010xt.

  I was 'forced' to Win 8.1.  I had been checked "remind me later" for months until it just went ahead and did it.

  I am Livid at the fact that the graphic EQUALIZER Beats Audio is disabled.  The sliders on the work left, but you cannot adjust the sound as you can with an equalizer.

  I searched the web for hours, days and ALL tried.  I have no doubt the most recent driver (after unistalling/reinstalling, etc. etc.).  It just is not supported in win 8.1, apparently.  He worked much to gain 8.

  I don't know if I'm more angry with Microsoft, HP, or beats.  One or all of them dropped the ball here.  This computer as $1 K and the Beats Audio was a key reason I bought it.  It is simply unacceptable, pathetic.

  I have $800 paradigm Millenia spekers and listen to a lot of records on the ground that need EQ.  where MS, HP, nor beats will solve this problem, which seems likely since the problem seems to have been around for a while, can anyone suggest a sound card, or driver or software 3rd - party who has an equalizer that affects all sounds, including Youtube & Vimeo?  Realtek?  SoundBlaster?

  There only seems to be a lot there - that's why the beats Control Panel was really great when it worked

  George

  Hello

  Try installing this driver that should help

  IDT High Definition Audio Driver

• VerizonWireless app works is not after upgrade to 4g

  Someone had questions using verizonwireless app after upgrade to 4 g? Also, when I log into the my account via the browser we it says my sim card is in a device not supported. Any ideas?

  try to uninstall one to get the latest market. I had this problem and it worked for me. Make sure that you are not in airplane mode because it will not read the radio if its in ap mode.

• WTR320N still slow after upgrade

  Today, I upgraded my LAN 10/100mbps to 100/1000 Mbps Wireless LAN using the Linksys WTR320N with. The initial tests took place without problems. The small local network set up with 2 laptops, router and modem worked well and I plugged in the other systems.

  During the test, the speed of the internet was as before, instantaneous loading of most of the pages (Facebook, Youtube, etc.) and reaches the maximum capable speed, which is 23MBps with a low ping about 30.

  Now, with the entire network, the internetspeed is not top 20MBps more, it sticks to 15-17, which is a loss of 6 Mbps on my connection. After checking on various topics on other forums, I upgraded the firmware of 1.0.0.3 for 1.0.0.4. Who gave a small improvement, but I can't yet reach my speed max, neither a decent ping and pageload time.

  I'm a cable internet provider that requires no password/username to log, so it is a permanent connection. MTU is 1500, and because I don't know what it is (I've seen the expression and change it to 1300/1350. a few times looking for a solution).

  No idea how I can speed up the loadtimes and the internetspeed?

  [EDIT] problems are both on cable in Wi - Fi. The signal strength of the wireless is maximum and never given wired connections problems before.

  Change the MTU to 1365.

  You have already updated the Firmware of the router.

  After upgrading the firmware on the router, it is recommended that you must reset the router and reconfigure the router.

  Press and hold the reset button on the router for 30 seconds. Release the reset and wait for 10 seconds. Power cycle the router and reconfigure the router.

• Why a sql statement has become slow after upgrade to 11g database

  Hello
  
  My previous version of the database is 9I and any sql statement are well-developed.
  but after upgrading to 11g database, a sql statement become slowly.
  
  My senior dba friend told me there are a few different calculating methods from 9i to 11g.
  is any body can explain this different methods from 9i to 11g, and what should be attention to calculate at what level 9i to 11g. I thank.
  
  Sean

  The administrator of yours is correct. What he meant, 9i, the works of the optimizer with different formulas and 11 g, there are different formulas. PS this sometimes causes when you upgrade from 9i (or even 10g too), analyze the queries that worked with RBO in 9i perfectly and used indexes, all of a sudden they stop using it because the CBO think not that this is a good choice. It would be too difficult to put formulas here by anyone, but what I can say is that to buy a book.
  http://www.Amazon.com/cost-based-Oracle-fundamentals-experts-voice/DP/1590596366

  And practice on 9i, 10g and 11g. It would say a lot of formulas used by oracle.

  HTH
  Aman...