Poor performance despite RAM upgrade

Hi
I just upgraded my MAC MINI 2GB RAM to a total of 6GB RAM.
The MAC Mini definitely shows as having 6GB of RAM now but still it seems to struggle.
I have only one song (with about 10 tracks) in Garageband, there's no stuff on my desktop etc so the performance should be better but even now it seems to struggle and GB often freezes. I don't really see what the problem could be as like I said I have only one song in there that I am working on and surely my MAC should be able to handle a lot more than that without crashing and freezing.
Any ideas please?

Yes, I have tried it. This is not very practical however and the reason i got more RAM is so that I do not always have to lock tracks. It is impractical to lock tracks, especially while mixing. Every time I have to lock a track it takes at least 30 secs to lock it, that's why I stopped locking them.
I would have thought that 4GB more RAM would allow me the 'luxury' of not having to lock. However, locking does help performance but is a major pain.
And again, the whole reason i spent money on a RAM upgrade was so that I wouldn't always have to lock, so locking the tracks now would defeat the object.

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    31 Number of tree internal pages
    201970 Number of bytes free in tree internal pages (20% ff)
    45 Number of tree leaf pages
    243550 Number of bytes free in tree leaf pages (33% ff)
    2814 Number of tree duplicate pages
    8360024 Number of bytes free in tree duplicate pages (63% ff)
    0 Number of tree overflow pages
    The Testbed
    I'm running all these tests using the latest BDB (v4.6) built from the source on Win2K3 server (release version). The test machine is 1.7GHz P4 with 1GB of RAM and an IDE hard drive. Not the fastest machine, but it was able to handle a log file like described before at a speed of 20K records/sec.
    BDB is configured in a single file in a BDB environment, using private memory, since only one process ever has access to the database).
    I ran a performance monitor while running SSW, capturing private bytes, disk read/write I/O, system cache size, etc.
    I also used a code profiler to analyze SSW and BDB performance.
    The Problem
    Small log files, such as 100MB, can be processed in no time - BDB handles them really well. However, once the entire BDB cache is filled up, the machine goes into some weird state and can sit in this state for hours and hours before completing the analysis.
    Another problem is that traversing large primary or secondary databases is a really slow and painful process. It is really not that much data!
    Overall, the 20K rec/sec quoted above drop down to 2K rec/sec. And that's all after most of the analysis has been done, just trying to save the database.
    The Tests
    SSW runs in two modes, memory mode and database mode. In memory mode, all data is kept in memory in SSW's own hash tables and then saved to BDB at the end of each run.
    In memory mode, the entire BDB is dumped to disk at the end of the run. First, it runs fairly fast, until the BDB cache is filled up. Then writing (disk I/O) goes at a snail pace, at about 3.5MB/sec, even though this disk can write at about 12-15MB/sec.
    Another problem is that the OS cache gets filled up, chewing through all available memory long before completion. In order to deal with this problem, I disabled the system cache using the DB_DIRECT_DB/LOG options. I could see OS cache left alone, but once BDB cache was filed up, processing speed was as good as stopped.
    Then I flipped options and used DB_DSYNC_DB/LOG options to disable OS disk buffering. This improved overall performance and even though OS cache was filling up, it was being flushed as well and, eventually, SSW finished processing this log, sporting 2K rec/sec. At least it finished, though - other combinations of these options lead to never-ending tests.
    In the database mode, stale data is put into BDB after processing every N records (e.g. 300K rec). In this mode, BDB behaves similarly - until the cache is filled up, the performance is somewhat decent, but then the story repeats.
    Some of the other things I tried/observed:
    * I tried to experiment with the trickle option. In all honesty, I hoped that this would be the solution to my problems - trickle some, make sure it's on disk and then continue. Well, trickling was pretty much useless and didn't make any positive impact.
    * I disabled threading support, which gave me some performance boost during regular value lookups throughout the test run, but it didn't help either.
    * I experimented with page size, ranging them from the default 8K to 64K. Using large pages helped a bit, but as soon as the BDB cached filled up, the story repeated.
    * The Db.put method, which was called 73557 times while profiling saving the database at the end, took 281 seconds. Interestingly enough, this method called ReadFile function (Win32) 20000 times, which took 258 seconds. The majority of the Db.put time was wasted on looking up records that were being updated! These lookups seem to be the true problem here.
    * I tried libHoard - it usually provides better performance, even in a single-threaded process, but libHoard didn't help much in this case.

    I have been able to improve processing speed up to
    6-8 times with these two techniques:
    1. A separate trickle thread was created that would
    periodically call DbEnv::memp_trickle. This works
    especially good on multicore machines, but also
    speeds things up a bit on single CPU boxes. This
    alone improved speed from 2K rec/sec to about 4K
    rec/sec.Hello Stone,
    I am facing a similar problem, and I too hope to resolve the same with memp_trickle. I had these queries.
    1. what was the % of clean pages that you specified?
    2. What duration were you clling this thread to call memp_trickle?
    This would give me a rough idea about which to tune my app. Would really appreciate if you can answer these queries.
    Regards,
    Nishith.
    >
    2. Maintaining multiple secondary databases in real
    time proved to be the bottleneck. The code was
    changed to create secondary databases at the end of
    the run (calling Db::associate with the DB_CREATE
    flag), right before the reports are generated, which
    use these secondary databases. This improved speed
    from 4K rec/sec to 14K rec/sec.

  • Crashing and poor performance during playback of a large project.

    Hi,
    I've been a regular user of iMovie for about 3 years and have edited several 50GB+ projects of DV quality footage without too many major issues with lag or 'dropped frames'. I currently have a 80GB project that resides on a 95% full 320GB Firewire 400 external drive that has been getting very slow to open and near impossible to work with.
    Pair the bursting-at-the-seams external drive, with an overburdened 90% full internal drive - the poor performance wasn't to be unexpected. So I bought a 1TB Firewire 400 drive to free up some space on my Mac. My large iTunes library (150GB) was the main culprit and it was quickly moved onto the new drive.
    The iMovie project was then moved onto my Mac's movie folder - I figured that the project needs some "room" to work (not that I really understand how Macs use memory) and that having roughly 80GB free with 1.5GB RAM (which is more than used to have) would make everything just that much smoother.
    Wrong.
    The project opened in roughly the same amount of time - but when I tried to play back the timeline, it plays like rubbish and then after 10-15 secs the Mac goes into 'sleep' mode. The screen goes off, the fans dies down and the 'heartbeat' light goes on. A click of the mouse 'wakes' the Mac only to find that if i try again, I get the same result.
    I've probably got so many variables going on here that it's probably hard to suggest what the problem might be but all I could think of was repairing permissions (which I did and none needed it).
    Stuck on this. Anyone have any advice?

    I understand completely, having worked with a 100 GB project once. I found that getting a movie bloated up to that size was just more difficult with jerky playback.
    I do have a couple of suggestions for you.
    You may need more than that 80GB free space for this movie. Is there any reason you cannot move it to the 1TB drive? If you have only your iTunes on it, you should have about 800 GB free.
    If you still need to have the project on your computer's drive, set your computer to never sleep.
    How close to finishing editing are you with this movie? If you are nearly done except for adding audio clips, you can export (share) it as QuickTime Full Quality movie. The resultant quicktime version of your iMovie will be smaller because it will contain only the clips actually used in the movie, not all the saved whole clips that iMovie keeps as its nondestructive editing feature. The quicktime movie will be one continuous clip, incorporating all your edits and added audio. It CAN be further edited, but you cannot change text of titles already there, or change transitions or remove already added audios.
    I actually do this with nearly every iMovie. I create my movies by first importing videos, then adding still photos, then editing with titles, effects and transitions. I add audio last, and if it becomes too distorted in playback, I export the movie and then continue adding audio clips.
    My 100+ GB movie slimmed down to only 8 GB with this method. (The large size was due to having so many clips. The movie was from VHS footage of my son's little league all-star game, and the video had so many skipped segments that I had to split it into thousands of clips to remove the dropped ones. Very old VHS tape!).
    I haven't upgraded to QT 7.5.5, but I heard that the jerky playback issue is mostly resolved with this new upgrade. I am in mid-project with about 5 iMovies, so I will probably plod along with my work-around method, not wanting to upgrade in the middle of any of them.
    Hope this is helpful to you.

  • Very poor performance on oracle linux 6.3 on virtual-box 4.2

    Dear all,
    I installed an oracle linux 6.3 on vbox VM (2 gb RAM, 20 gb disk): the installation took a long time and after, I faced poor performance and big latency.
    One bug reported:
    WARNING: at kernel/time/clockevents.c:47 clockevent_delta2ns+0x79/0x90()
    Hardware name: VirtualBox
    Modules linked in:
    Pid: 1, comm: swapper Not tainted 2.6.39-200.24.1.el6uek.x86_64 #1
    Call Trace:
    [<ffffffff8106ad1f>] warn_slowpath_common+0x7f/0xc0
    [<ffffffff8106ad7a>] warn_slowpath_null+0x1a/0x20
    [<ffffffff8109d649>] clockevent_delta2ns+0x79/0x90
    [<ffffffff819b8427>] calibrate_APIC_clock+0xeb/0x2f6
    [<ffffffff819b874c>] setup_boot_APIC_clock+0x59/0x7e
    [<ffffffff819b8336>] APIC_init_uniprocessor+0xfc/0x102
    [<ffffffff819b60fc>] smp_sanity_check+0x69/0x145
    [<ffffffff819b62fd>] native_smp_prepare_cpus+0x125/0x215
    [<ffffffff819a776b>] kernel_init+0x1c9/0x2a8
    [<ffffffff8150edc4>] kernel_thread_helper+0x4/0x10
    [<ffffffff819a75a2>] ? parse_early_options+0x20/0x20
    [<ffffffff8150edc0>] ? gs_change+0x13/0x13
    I upgraded memory to 4 gb RAM but it was on vain
    Please, any idea so far ?
    Best Regards

    I can confirm that there is no issue with Virtualbox 4.2 and Oracle Linux 6.3. I use it all the time. Performance should be near native and some aspects like disk I/O may even be faster. Your problem could be insufficient hardware, like missing x86_64 or hardware virtualization support. However, like rukbat wrote, this is not the right forum to discuss Virtualbox and your computer hardware here. I suggest to start with the Virtualbox documentation to verify your hardware is sufficient.
    https://www.virtualbox.org/manual/ch10.html#hwvirt
    https://www.virtualbox.org/manual/ch14.html

  • Performance issues since upgrade

    I am on a late 2011 MacBook Pro and am having severs performance issues since upgrading to Mavericks. I fear my issues may be related to company installed anti-virus (which I cannot remove), but I was hoping someone could look over my EtreCheck for other potential solutions.
    One really odd issue I am having, which I cannot seem to find good information for on Google, is at least 4-5 times a day my Mac just stops. No beach ball, no anything, for about 1-5 minutes. Then it's fine. Maybe just me grasping at straws, but it seems related to a when webpage loads a bunch of images? I always use Safari btw, but testing other browsers, like Chrome & Firefox, it happens as well.
    I have also removed TotalFinder and have noticed no improvement and still have the above issue.
    Thanks in advance!
    Here is my EtreCheck:
    Problem description:
    slow performance on Mavericks
    EtreCheck version: 2.0.11 (98)
    Report generated November 11, 2014 at 8:51:26 AM EST
    Hardware Information: ℹ️
      MacBook Pro (17-inch, Late 2011) (Verified)
      MacBook Pro - model: MacBookPro8,3
      1 2.5 GHz Intel Core i7 CPU: 4-core
      8 GB RAM Upgradeable
      BANK 0/DIMM0
      4 GB DDR3 1333 MHz ok
      BANK 1/DIMM0
      4 GB DDR3 1333 MHz ok
      Bluetooth: Old - Handoff/Airdrop2 not supported
      Wireless:  en1: 802.11 a/b/g/n
    Video Information: ℹ️
      Intel HD Graphics 3000 - VRAM: 512 MB
      AMD Radeon HD 6770M - VRAM: 1024 MB
      Color LCD 1920 x 1200
      LED Cinema Display 1920 x 1200
    System Software: ℹ️
      OS X 10.9.5 (13F34) - Uptime: 0:46:22
    Disk Information: ℹ️
      APPLE HDD HTS727575A9E362 disk0 : (750.16 GB)
      S.M.A.R.T. Status: Verified
      EFI (disk0s1) <not mounted> : 210 MB
      Macintosh HD (disk0s2) /  [Startup]: 749.30 GB (256.69 GB free)
      Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
      MATSHITADVD-R   UJ-8A8
    USB Information: ℹ️
      Apple Inc. FaceTime HD Camera (Built-in)
      Fitbit Inc. Fitbit Base Station
      Apple Inc. BRCM2070 Hub
      Apple Inc. Bluetooth USB Host Controller
      Apple Inc. Apple Internal Keyboard / Trackpad
      Apple, Inc. Keyboard Hub
      Apple, Inc Apple Keyboard
      Tablet PTZ-630
      Logitech Logitech USB Headset
      Apple Inc. Display iSight
      Apple Inc. Apple LED Cinema Display
      Apple Inc. Display Audio
      Apple Computer, Inc. IR Receiver
    Firewire Information: ℹ️
      Iomega HDD unknown_device 800mbit - 800mbit max
      S.M.A.R.T. Status: Verified
      disk1s1 (disk1s1) <not mounted> : 32 KB
      Iomega HDD (disk1s3) /Volumes/Iomega HDD : 500.04 GB (22.88 GB free)
      Files (disk1s5) /Volumes/Files : 499.90 GB (416.87 GB free)
    Thunderbolt Information: ℹ️
      Apple Inc. thunderbolt_bus
    Gatekeeper: ℹ️
      Anywhere
    Kernel Extensions: ℹ️
      /Library/Application Support/Symantec/Protector
      [not loaded] com.symantec.kext.protector.panther (1.0f5) Support
      [not loaded] com.symantec.kext.protector.tigerplus (1.0f5) Support
      /Library/StartupItems/SymAutoProtect
      [loaded] com.Symantec.kext.SAVAPComm (11.0.6) Support
      /System/Library/Extensions
      [loaded] com.Cycling74.driver.Soundflower (1.5.1) Support
      [loaded] com.InnovationTechnology.driver.ComputerAudio (1.01 - SDK 10.7) Support
      [not loaded] com.cisco.nke.ipsec (2.0.1) Support
      [not loaded] com.wacom.kext.wacomtablet (6.3.7 - SDK 10.8) Support
    Startup Items: ℹ️
      CiscoVPN: Path: /System/Library/StartupItems/CiscoVPN
      NortonMissedTasks: Path: /Library/StartupItems/NortonMissedTasks
      SMC: Path: /Library/StartupItems/SMC
      SymAutoProtect: Path: /Library/StartupItems/SymAutoProtect
      SymProtector: Path: /Library/StartupItems/SymProtector
      Startup items are obsolete and will not work in future versions of OS X
    Launch Agents: ℹ️
      [not loaded] com.adobe.AAM.Updater-1.0.plist Support
      [loaded] com.adobe.CS5ServiceManager.plist Support
      [loaded] com.google.keystone.agent.plist Support
      [running] com.jamfsoftware.jamf.agent.plist Support
      [loaded] com.oracle.java.Java-Updater.plist Support
      [running] com.symantec.quickmenu.application.plist Support
      [running] com.wacom.wacomtablet.plist Support
      [running] net.juniper.pulsetray.plist Support
    Launch Daemons: ℹ️
      [loaded] com.adobe.fpsaud.plist Support
      [running] com.fitbit.fitbitd.plist Support
      [running] com.fitbit.galileod.plist Support
      [loaded] com.google.keystone.daemon.plist Support
      [running] com.jamfsoftware.jamf.daemon.plist Support
      [not loaded] com.jamfsoftware.startupItem.plist Support
      [loaded] com.jamfsoftware.task.1.plist Support
      [loaded] com.microsoft.office.licensing.helper.plist Support
      [loaded] com.oracle.java.Helper-Tool.plist Support
      [loaded] com.oracle.java.JavaUpdateHelper.plist Support
      [loaded] com.rogueamoeba.instanton-agent.plist Support
      [running] net.juniper.AccessService.plist Support
      [loaded] net.juniper.UninstallPulse.plist Support
    User Launch Agents: ℹ️
      [loaded] com.valvesoftware.steamclean.plist Support
      [running] ws.agile.1PasswordAgent.plist Support
    User Login Items: ℹ️
      gfxCardStatus Application (/Users/[redacted]/Downloads/gfxCardStatus.app)
      Dropbox Application (/Applications/Dropbox.app)
      Microsoft Database Daemon Application (/Applications/Microsoft Office 2011/Office/Microsoft Database Daemon.app)
      cdn Volume (/Volumes/cdn)
      TotalFinder Application (/Applications/TotalFinder.app)
      SAVDiskMountNotify Application (/Library/Application Support/Symantec/AntiVirus/SAVDiskMountNotify.app)
      ScanNotification Application (/Library/Application Support/Symantec/AntiVirus/ScanNotification.app)
      SymSecondaryLaunch Application (/Library/Application Support/Norton Solutions Support/Scheduler/SymSecondaryLaunch.app)
    Internet Plug-ins: ℹ️
      OfficeLiveBrowserPlugin: Version: 12.3.6 Support
      Flash Player: Version: 15.0.0.189 - SDK 10.6 Mismatch! Adobe recommends 15.0.0.223
      AdobePDFViewer: Version: 10.0.2 Support
      Unity Web Player: Version: UnityPlayer version 4.5.4f1 - SDK 10.6 Support
      googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support
      AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 Support
      iPhotoPhotocast: Version: 7.0
      DirectorShockwave: Version: 11.5.9r620 Support
      QuickTime Plugin: Version: 7.7.3
      FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
      Silverlight: Version: 4.0.60310.0 Support
      MeetingJoinPlugin: Version: (null) - SDK 10.6 Support
      net.juniper.DSSafariExtensions: Version: (null) Support
      Default Browser: Version: 537 - SDK 10.9
      Flip4Mac WMV Plugin: Version: 2.3.1.2 Support
      o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support
      WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.2 Support
      SharePointBrowserPlugin: Version: 14.4.5 - SDK 10.6 Support
      JavaAppletPlugin: Version: Java 7 Update 71 Check version
      WacomNetscape: Version: 2.1.0-1 - SDK 10.8 Support
    User Internet Plug-ins: ℹ️
      SOEWebInstaller: Version: 1.0 - SDK 10.5 Support
      Aspera Web 3.1.2.72265: Version: (null) - SDK 10.6 Support
    Safari Extensions: ℹ️
      1Password
      Adblock Plus
      Reddit Enhancement Suite
    3rd Party Preference Panes: ℹ️
      Flash Player  Support
      Flip4Mac WMV  Support
      Java  Support
      MacFUSE  Support
      SymAutoProtect
      Symantec\nQuickMenu  Support
      WacomTablet  Support
    Time Machine: ℹ️
      Skip System Files: NO
      Mobile backups: ON
      Auto backup: YES
      Destinations:
      Iomega HDD [Local]
      Total size: 500.04 GB
      Total number of backups: 37
      Oldest backup: 2014-10-14 14:11:11 +0000
      Last backup: 2014-11-11 13:27:48 +0000
      Size of backup disk: Excellent
      Backup size 500.04 GB > (Disk size 0 B X 3)
    Top Processes by CPU: ℹ️
          36% com.apple.WebKit.Plugin.64
          34% SymAutoProtect
          13% WindowServer
          9% Unity
          4% Activity Monitor
    Top Processes by Memory: ℹ️
      455 MB Safari
      361 MB com.apple.WebKit.Plugin.64
      292 MB Unity
      77 MB com.apple.WebKit.Networking
      77 MB com.apple.WebKit.WebContent
    Virtual Memory Information: ℹ️
      2.08 GB Free RAM
      2.39 GB Active RAM
      1.34 GB Inactive RAM
      1.40 GB Wired RAM
      1.11 GB Page-ins
      5.54 GB Page-outs

    Activity Monitor - Mavericks  also Yosemite
    Activity Monitor in Mavericks has significant changes
    Performance Guide
    Why is my computer slow
    Why your Mac runs slower than it should
    Slow Mac After Mavericks
    Things you can do to resolve slowdowns  see post by Kappy

  • Poor performance and high number of gets on seemingly simple insert/select

    Versions & config:
    Database : 10.2.0.4.0
    Application : Oracle E-Business Suite 11.5.10.2
    2 node RAC, IBM AIX 5.3Here's the insert / select which I'm struggling to explain why it's taking 6 seconds, and why it needs to get > 24,000 blocks:
    INSERT INTO WF_ITEM_ATTRIBUTE_VALUES ( ITEM_TYPE, ITEM_KEY, NAME, TEXT_VALUE,
      NUMBER_VALUE, DATE_VALUE ) SELECT :B1 , :B2 , WIA.NAME, WIA.TEXT_DEFAULT,
      WIA.NUMBER_DEFAULT, WIA.DATE_DEFAULT FROM WF_ITEM_ATTRIBUTES WIA WHERE
      WIA.ITEM_TYPE = :B1
    call     count       cpu    elapsed       disk      query    current        rows
    Parse        1      0.00       0.00          0          0          4           0
    Execute      2      3.44       6.36          2      24297        198          36
    Fetch        0      0.00       0.00          0          0          0           0
    total        3      3.44       6.36          2      24297        202          36
    Misses in library cache during parse: 1
    Misses in library cache during execute: 2Also from the tkprof output, the explain plan and waits - virtually zero waits:
    Rows     Execution Plan
          0  INSERT STATEMENT   MODE: ALL_ROWS
          0   TABLE ACCESS   MODE: ANALYZED (BY INDEX ROWID) OF 'WF_ITEM_ATTRIBUTES' (TABLE)
          0    INDEX   MODE: ANALYZED (RANGE SCAN) OF 'WF_ITEM_ATTRIBUTES_PK' (INDEX (UNIQUE))
    Elapsed times include waiting on following events:
      Event waited on                             Times   Max. Wait  Total Waited
      ----------------------------------------   Waited  ----------  ------------
      library cache lock                             12        0.00          0.00
      gc current block 2-way                         14        0.00          0.00
      db file sequential read                         2        0.01          0.01
      row cache lock                                 24        0.00          0.01
      library cache pin                               2        0.00          0.00
      rdbms ipc reply                                 1        0.00          0.00
      gc cr block 2-way                               4        0.00          0.00
      gc current grant busy                           1        0.00          0.00
    ********************************************************************************The statement was executed 2 times. I know from slicing up the trc file that :
    exe #1 : elapsed = 0.02s, query = 25, current = 47, rows = 11
    exe #2 : elapsed = 6.34s, query = 24272, current = 151, rows = 25
    If I run just the select portion of the statement, using bind values from exe #2, I get small number of gets (< 10), and < 0.1 secs elapsed.
    If I make the insert into an empty, non-partitioned table, I get :
    call     count       cpu    elapsed       disk      query    current        rows
    Parse        1      0.00       0.00          0          0          0           0
    Execute      1      0.01       0.08          0        137         53          25
    Fetch        0      0.00       0.00          0          0          0           0
    total        2      0.01       0.08          0        137         53          25and same explain plan - using index range scan on WF_Item_Attributes_PK.
    This problem is part of testing of a database upgrade and country go-live. On a 10.2.0.3 test system (non-RAC), the same insert/select - using the real WF_Item_Attributes_Value table takes :
    call     count       cpu    elapsed       disk      query    current        rows
    Parse        1      0.00       0.00          0          0          0           0
    Execute      1      0.00       0.10         10         27        136          25
    Fetch        0      0.00       0.00          0          0          0           0
    total        2      0.00       0.10         10         27        136          25So I'm struggling to understand why the performance on the 10.2.0.4 RAC system is so much worse for this query, and why it's doing so many gets. Suggestions, thoughts, ideas welcomed.
    I've verified system level things - CPUs weren't/aren't max'd out, no significant paging/swapping activity, run queue not long. AWR report for the time period shows nothing unusual.
    further info on the objects concerned:
    query source table :
    WF_Item_Attributes_PK : unique index on Item_Type, Name. Index has 144 blocks, non-partitioned
    WF_Item_Attributes tbl : non-partitioned, 160 blocks
    insert destination table:
    WF_Item_Attribute_Values:
    range partitioned on Item_Type, and hash sub-partitioned on Item_Key
    both executions of the insert hit the partition with the most data : 127,691 blocks total ; 8 sub-partitions with 15,896 to 16,055 blocks per sub-partition.
    WF_Item_Attribute_Values_PK : unique index on columns Item_Type, Item_Key, Name. Range/hash partitioned as per table.
    Bind values:
    exe #1 : Item_Type (:B1) = OEOH, Item_Key (:B2) = 1048671
    exe #2 : Item_Type (:B1) = OEOL, Item_Key (:B2) = 4253168
    number of rows in WF_Item_Attribute_Values for Item_Type = OEOH : 1132587
    number of rows in WF_Item_Attribute_Values for Item_Type = OEOL : 18763670
    The non-RAC 10.2.0.3 test system (clone of Production from last night) has higher row counts for these 2.
    thanks and regards
    Ivan

    hi Sven,
    Thanks for your input.
    1) I guess so, but I haven't lifted the lid to delve inside the form as to which one. I don't think it's the cause though, as I got poor performance running the insert statement with my own value (same statement, using my own bind value).
    2) In every execution plan I've seen, checked, re-checked, it uses a range scan on the primary key. It is the most efficient I think, but the source table is small in any case - table 160 blocks, PK index 144 blocks. So I think it's the partitioned destination table that's the problem - but we only see this issue on the 10.2.0.4 pre-production (RAC) system. The 10.2.0.3 (RAC) Production system doesn't have it. This is why it's so puzzling to me - the source table read is fast, and does few gets.
    3) table storage details below - the Item_Types being used were 'OEOH' (fast execution) and 'OEOL' (slow execution). Both hit partition WF_ITEM49, hence I've only expanded the subpartition info for that one (there are over 600 sub-partitions).
    ============= From DBA_Part_Tables : Partition Type / Count =============
    PARTITI SUBPART PARTITION_COUNT DEF_TABLESPACE_NAME
    RANGE   HASH                 77 APPS_TS_TX_DATA
    1 row selected.
    ============= From DBA_Tab_Partitions : Partition Names / Tablespaces =============
    Partition Name       TS Name         High Value           High Val Len
    WF_ITEM1             APPS_TS_TX_DATA 'A1'                            4
    WF_ITEM2             APPS_TS_TX_DATA 'AM'                            4
    WF_ITEM3             APPS_TS_TX_DATA 'AP'                            4
    WF_ITEM47            APPS_TS_TX_DATA 'OB'                            4
    WF_ITEM48            APPS_TS_TX_DATA 'OE'                            4
    WF_ITEM49            APPS_TS_TX_DATA 'OF'                            4
    WF_ITEM50            APPS_TS_TX_DATA 'OK'                            4
    WF_ITEM75            APPS_TS_TX_DATA 'WI'                            4
    WF_ITEM76            APPS_TS_TX_DATA 'WS'                            4
    WF_ITEM77            APPS_TS_TX_DATA MAXVALUE                        8
    77 rows selected.
    ============= From dba_part_key_columns : Partition Columns =============
    NAME                           OBJEC Column Name                    COLUMN_POSITION
    WF_ITEM_ATTRIBUTE_VALUES       TABLE ITEM_TYPE                                    1
    1 row selected.
    PPR1 sql> @q_tabsubpart wf_item_attribute_values WF_ITEM49
    ============= From DBA_Tab_SubPartitions : SubPartition Names / Tablespaces =============
    Partition Name       SUBPARTITION_NAME              TS Name         High Value           High Val Len
    WF_ITEM49            SYS_SUBP3326                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3328                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3332                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3331                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3330                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3329                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3327                   APPS_TS_TX_DATA                                 0
    WF_ITEM49            SYS_SUBP3325                   APPS_TS_TX_DATA                                 0
    8 rows selected.
    ============= From dba_part_key_columns : Partition Columns =============
    NAME                           OBJEC Column Name                    COLUMN_POSITION
    WF_ITEM_ATTRIBUTE_VALUES       TABLE ITEM_KEY                                     1
    1 row selected.
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    Segment Name                        TSname       Partition Name       Segment Type     BLOCKS     Mbytes    EXTENTS Next Ext(Mb)
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3332         TblSubPart        16096     125.75       1006         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3331         TblSubPart        16160     126.25       1010         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3330         TblSubPart        16160     126.25       1010         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3329         TblSubPart        16112    125.875       1007         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3328         TblSubPart        16096     125.75       1006         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3327         TblSubPart        16224     126.75       1014         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3326         TblSubPart        16208    126.625       1013         .125
    WF_ITEM_ATTRIBUTE_VALUES            @TX_DATA     SYS_SUBP3325         TblSubPart        16128        126       1008         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3332         IdxSubPart        59424     464.25       3714         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3331         IdxSubPart        59296     463.25       3706         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3330         IdxSubPart        59520        465       3720         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3329         IdxSubPart        59104     461.75       3694         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3328         IdxSubPart        59456      464.5       3716         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3327         IdxSubPart        60016    468.875       3751         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3326         IdxSubPart        59616     465.75       3726         .125
    WF_ITEM_ATTRIBUTE_VALUES_PK         @TX_IDX      SYS_SUBP3325         IdxSubPart        59376    463.875       3711         .125
    sum                                                                                               4726.5
    [the @ in the TS Name is my shortcode, as Apps stupidly prefixes every ts with "APPS_TS_"]
    The Tablespaces used for all subpartitions are UNIFORM extent mgmt, AUTO segment_space_management ; LOCAL extent mgmt.regards
    Ivan

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    jwcxz wrote:Have you looked at your process table for any program with abnormal CPU usage?  That seems like the logical place to start.  You shouldn't be getting poor performance in anything with that system.  I have a 2.0GHz Core 2 Duo and an Intel GMA 965 and I've never had any problems with Flash.  It's much better than it used to be.
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    Last edited by BoppreH (2009-05-03 04:25:20)

  • Skype crashing and poor performance

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    Please find a solution for this problem, because it is super annoying, and I can't use Skype, which will eventually result in me leaving Skype.
    Solved!
    Go to Solution.

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  • Poor performance with WebI and BW hierarchy drill-down...

    Hi
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  • Poor performance and voltage fluctuation.

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    jwcxz wrote:Have you looked at your process table for any program with abnormal CPU usage?  That seems like the logical place to start.  You shouldn't be getting poor performance in anything with that system.  I have a 2.0GHz Core 2 Duo and an Intel GMA 965 and I've never had any problems with Flash.  It's much better than it used to be.
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  • This is the regular status of the memory of my macbook pro. Do you think I need a RAM upgrade?

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