SQL Server wait types - keep a close watch on IO_COMPLETION and WRITELOG :: sqlperf

In the recent times I have had few opportunities to work on a slow performance related issues, having the usual monitoring methods in place the server instance was suffering slow performance (at times). Though it is essential to keep an eye on database design, resource utilization and performance with a monitoring in place to catch up performance bottlenecks in OLTP application kind of environment. In specific to the subject line and problem I would like to enhance the problems that were faced, when...(<a href="http://sqlserver-qa.net/blogs/perftune/archive/2010/10/07/9644.aspx">read more</a>)<img src="http://sqlserver-qa.net/aggbug.aspx?PostID=9644" width="1" height="1">