DBCC DROPCLEANBUFFERS


	DBCC DROPCLEANBUFFERS

Osolage

6-7-2007 4:43 PM

1224 views

tags:

sql server, testing, dbcc, database administration, performance tuning

Osolage says:

I saw one of my colleagues using this procedure. I haven't used it myself, but I think I'm about to start experimenting with it. I think the part about executing a CHECKPOINT first makes sense.

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6-7-2007 6:56 PM

BitDrifter

Great clip, thanks.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/6b5b605a-8f97-4b32-92ac-62cf0544cca7/6F771F14-E298-4012-9294-2A4002860D24/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sql-server-performance.com/dbcc_commands.asp" href="http://www.sql-server-performance.com/dbcc_commands.asp" style="font-size: 11px;">www.sql-server-performance.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sql-server-performance.com/dbcc_commands.asp"><P><STRONG>DBCC DROPCLEANBUFFERS</STRONG>: Use this command to remove all the test data from SQL Server's data cache (buffer) between performance tests to ensure fair testing. Keep in mind that this command only removes clean buffers, not dirty buffers. Because of this, before running the DBCC DROPCLEANBUFFERS command, you may first want to run the CHECKPOINT command first. Running CHECKPOINT will write all dirty buffers to disk. And then when you run DBCC DROPCLEANBUFFERS, you can be assured that all data buffers are cleaned out, not just the clean ones.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/6F771F14-E298-4012-9294-2A4002860D24/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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