DOCUMENT:Q202006 31-JUL-2001 [sms] TITLE :SMS: Delete Special Uses Many Locks PRODUCT :Microsoft Systems Management Server PROD/VER:winnt:1.2,2.0 OPER/SYS: KEYWORDS:kbDatabase kbsms200 kbsms200fix kbsms120bug smsdatabase ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Systems Management Server versions 1.2, 2.0 ------------------------------------------------------------------------------- SUMMARY ======= In Systems Management Server 1.2, when selecting large numbers of computers to delete from the Delete Special box, as many as 100 locks may be used to remove one computer. This could cause poor performance on the database because it is likely to occur during normal business hours and while that database is under normal or heavy stress. In Systems Management Server version 2.0, this behavior has been changed. MORE INFORMATION ================ In Systems Management Server 1.2, the deletion of a single computer would have generated the SQL syntax below to remove it. This potentially resulted in as many as 100 locks against the database: begin transaction delete MachineDataTable from MachineDataTable ,#WS where datakey = dwMachineID delete MachineDataHistoryTable from MachineDataHistoryTable ,#WS where datakey = dwMachineID delete Machines from Machines ,#WS where datakey = dwMachineID delete from WorkstationStatus where LastHWScan < "07/01/96 18:37:16" and (LastSWScan < "07/01/96 18:37:16" OR LastSWScan is null) commit transaction Because most administrators would be performing this maintenance during business hours, this may have caused locking errors to be recorded on the SQL Server, as well as hampered overall SQL Server performance. However, in Systems Management Server 2.0, SMS_SQL_MONITOR automatically performs the computer removal from the database during times of minimal SQL Server activity; frequently enough to prevent a backlog. SMS_SQL_MONITOR was designed to remove computers from the database that have not been inventoried in the last 90 days. This new design will reduce the work of the administrator, as well as reduce the potential performance hits against the database. Because SMS_SQL_MONITOR works automatically in the background, it is a more efficient method of removing computers that have become inactive. Additional query words: machine machines ====================================================================== Keywords : kbDatabase kbsms200 kbsms200fix kbsms120bug smsdatabase Technology : kbSMSSearch kbSMS120 kbSMS200 Version : winnt:1.2,2.0 Issue type : kbinfo ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.