I made the same mistake as Jorge and sent to the list owner and not the list itself :)
neil -----Original Message----- From: Ruston, Neil Sent: 22 March 2005 13:51 To: 'Jorge de Almeida Pinto'; '[EMAIL PROTECTED] ' Subject: RE: [ActiveDir] Scheduling online DIT file defrags Thanks Jorge and Sakari. I'll investigate the options offered. BTW: My first reaction was indeed 'we need to upgrade the DCs' which is planned for later this year in any case. Sounds like we have another driver to perform that upgrade :) Thanks, neil -----Original Message----- From: Jorge de Almeida Pinto [mailto:[EMAIL PROTECTED] Sent: 22 March 2005 12:06 To: 'Ruston, Neil '; '[EMAIL PROTECTED] ' Subject: RE: [ActiveDir] Scheduling online DIT file defrags Hi, The garbage collection process first cleans up all tombstones that exceed the tombstone lifetime and after that it does an online defrag. To change the garbage collection period you need to be the computergod of the forest (enterprise admin). Changing the period will affect ALL DCs in the forest! As I know of you only have the possibility to specify an interval in hours (default = 12 hours) and not specific times For more info see http://support.microsoft.com/kb/198793 (The Active Directory Database Garbage Collection Process) Changing the period to a lower value will spread the load of removing tombstones from the DB but I don't think it will help that much. Increasing the value will affect your DC in a way that when it runs it remove more tombstones in the same run which will affect the performance of your DC even more. I think the only solution for this is to boost the performance of your DC(s) by upgrading the hardware (more RAM/CPU power) Then again, the CPU spike only occurs at the moment of the garbage collection process... is that bad? The CPU spike is not continuously. If you experienced a continous CPU spike then I think I would say pump up your HW Cheers, Jorge -----Original Message----- From: [EMAIL PROTECTED] To: ActiveDir@mail.activedir.org Sent: 3/22/2005 11:19 AM Subject: [ActiveDir] Scheduling online DIT file defrags It has been suggested that the online ESE defrag of the DIT file is causing CPU spikes when executed, twice per day within our environment. I therefore have two questions, relating to the online defrag: 1. Behaviour I assume a DC performs an online defrag at boot and then every 12 hours thereafter. Is this correct? This implies that the schedule could be altered by simply rebooting the DC at an appropriate time [not elegant, admittedly!] 2. Scheduling Is it possible to change the schedule such that defrags are performed (twice daily) at specific times? Thanks in advance, neil MVP - dir services ======================================================================== ====== This message is for the sole use of the intended recipient. If you received this message in error please delete it and notify us. If this message was misdirected, CSFB does not waive any confidentiality or privilege. CSFB retains and monitors electronic communications sent through its network. Instructions transmitted over this system are not binding on CSFB until they are confirmed by us. Message transmission is not guaranteed to be secure. ======================================================================== ====== This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you. ============================================================================== This message is for the sole use of the intended recipient. If you received this message in error please delete it and notify us. If this message was misdirected, CSFB does not waive any confidentiality or privilege. CSFB retains and monitors electronic communications sent through its network. Instructions transmitted over this system are not binding on CSFB until they are confirmed by us. Message transmission is not guaranteed to be secure. ============================================================================== List info : http://www.activedir.org/List.aspx List FAQ : http://www.activedir.org/ListFAQ.aspx List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
