Purge Stats History taking too long

Hi,
I am doing a purge of stats history on my database and it is taking ages for what I believe should be a small data set
I have checked the stats history retention using
select dbms_stats.get_stats_history_availability from dual;
26/11/2010 22:10:42.668499000 +00:00
select sysdate-500
from dual;
12/12/2010 10:52:09
exec dbms_stats.purge_stats(sysdate-500);
The above purge has been running for over an hour ( and is still going ! ). This is on a test system with no real other activity going on within it.
Q1. Why is the above purge taking so long on what should be a relatively small data set ?
any help greatly appreciated,
Jim

So sorry,
from doc.
PURGE_STATS Procedure
This procedure purges old versions of statistics saved in the dictionary. To run this procedure, you must have the SYSDBA or both ANALYZE ANY DICTIONARY and ANALYZE ANY system privilege.
Syntax
DBMS_STATS.PURGE_STATS(
before_timestamp TIMESTAMP WITH TIME ZONE);
Delete all infor before 1,5 years. How many time you have beyond this date ??? the problem is the UNDO, purge using a batch process, delete from days to days, or using weeks.
HTH
Antonio NAVARRO

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    Linc, here's what I've got from what you asked me to do. I hope you don't mind, but it was simple enough to leave everything in, so you could see the progression:
    Kristen-Scotts-Computer:~ kristenscott$ kextstat -kl | awk ' !/apple/ { print $6 $7 } '
    Kristen-Scotts-Computer:~ kristenscott$ sudo launchctl list | sed 1d | awk ' !/0x|apple|com\.vix|edu\.|org\./ { print $3 } '
    WARNING: Improper use of the sudo command could lead to data loss
    or the deletion of important system files. Please double-check your
    typing when using sudo. Type "man sudo" for more information.
    To proceed, enter your password, or type Ctrl-C to abort.
    Password:
    com.microsoft.office.licensing.helper
    com.google.keystone.daemon
    com.adobe.versioncueCS3
    Kristen-Scotts-Computer:~ kristenscott$ launchctl list | sed 1d | awk ' !/0x|apple|edu\.|org\./ { print $3 } '
    com.google.keystone.root.agent
    com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae
    Kristen-Scotts-Computer:~ kristenscott$ ls -1A {,/}Library/{Ad,Compon,Ex,Fram,In,La,Mail/Bu,P*P,Priv,Qu,Scripti,Sta}* 2> /dev/null
    /Library/Components:
    /Library/Extensions:
    /Library/Frameworks:
    Adobe AIR.framework
    NyxAudioAnalysis.framework
    PluginManager.framework
    iLifeFaceRecognition.framework
    iLifeKit.framework
    iLifePageLayout.framework
    iLifeSQLAccess.framework
    iLifeSlideshow.framework
    /Library/Input Methods:
    /Library/Internet Plug-Ins:
    AdobePDFViewer.plugin
    Disabled Plug-Ins
    Flash Player.plugin
    Flip4Mac WMV Plugin.plugin
    Flip4Mac WMV Plugin.webplugin
    Google Earth Web Plug-in.plugin
    JavaPlugin2_NPAPI.plugin
    JavaPluginCocoa.bundle
    Musicnotes.plugin
    NP-PPC-Dir-Shockwave
    Quartz Composer.webplugin
    QuickTime Plugin.plugin
    Scorch.plugin
    SharePointBrowserPlugin.plugin
    SharePointWebKitPlugin.webplugin
    flashplayer.xpt
    googletalkbrowserplugin.plugin
    iPhotoPhotocast.plugin
    npgtpo3dautoplugin.plugin
    nsIQTScriptablePlugin.xpt
    /Library/LaunchAgents:
    com.google.keystone.agent.plist
    /Library/LaunchDaemons:
    com.adobe.versioncueCS3.plist
    com.apple.third_party_32b_kext_logger.plist
    com.google.keystone.daemon.plist
    com.microsoft.office.licensing.helper.plist
    /Library/PreferencePanes:
    Flash Player.prefPane
    Flip4Mac WMV.prefPane
    VersionCue.prefPane
    VersionCueCS3.prefPane
    /Library/PrivilegedHelperTools:
    com.microsoft.office.licensing.helper
    /Library/QuickLook:
    GBQLGenerator.qlgenerator
    iWork.qlgenerator
    /Library/QuickTime:
    AppleIntermediateCodec.component
    AppleMPEG2Codec.component
    Flip4Mac WMV Export.component
    Flip4Mac WMV Import.component
    Google Camera Adapter 0.component
    Google Camera Adapter 1.component
    /Library/ScriptingAdditions:
    Adobe Unit Types
    Adobe Unit Types.osax
    /Library/StartupItems:
    AdobeVersionCue
    HP Trap Monitor
    Library/Address Book Plug-Ins:
    SkypeABDialer.bundle
    SkypeABSMS.bundle
    Library/Internet Plug-Ins:
    Move_Media_Player.plugin
    fbplugin_1_0_1.plugin
    Library/LaunchAgents:
    com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae.plist
    com.apple.FolderActions.enabled.plist
    com.apple.FolderActions.folders.plist
    Library/PreferencePanes:
    A Better Finder Preferences.prefPane
    Kristen-Scotts-Computer:~ kristenscott$

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