Solution Guide for Migrating Oracle on UNIX to SQL Server - Willy .Net

<strong>Solution</strong> <strong>Guide</strong> <strong>for</strong> <strong>Migrating</strong> <strong>Oracle</strong> on UNIX to SQL Server on Windows 353Appendix C: BaseliningThis appendix is concerned with creating baselines, capturing statistics, and comparingand reporting results.Creating BaselinesB aselines are a collection of facts and figures that reflect the state of a system. Mostcommonly, the term baseline is used with respect to per<strong>for</strong>mance. In the StabilizingPhase, this term is used to refer to a snapshot of the entire system specification.Unlike a new development pr oject where there is no reference point, the state of thecurrent solution can be captured in a migration project. This can be used as a baselinef or comparison with the migrated solution being tested.After every successfulcycle of testing, it is recommended that all elements, such asscripts, applications, application configuration, database configuration, and databases,a re backed up and are baselined with appropriate tags <strong>for</strong> identification. Baselines fromeach cycle of testing can be compared with each other to see the progression towards asolution that can be packaged <strong>for</strong> production.You should create a baseline during the Stabilizing Phase. These baseline values can beused later while troubleshooting per<strong>for</strong>mance problems and also <strong>for</strong> proactive monitoring.The Per<strong>for</strong>mance Monitor, also known as System Monitor tool, can be used to monitorkey system resources (CPU, memory, Disk I/O, network, as well as SQL Servercounters) while you run the Stabilizing Phase tests.The following tables (A.4 through A.8) list some of the per<strong>for</strong>mance monitor counters thatyou can use <strong>for</strong> creating a baseline. These counters can also be used <strong>for</strong> generalmonitoring of the solution after deployment.Table A.4: Memory ManagementPer<strong>for</strong>mance DescriptionMonitor Counters\Memory\Available Available MBytes is the amount of physical memory availableMbytesto processes running on the computer, in Megabytes. Lack ofmemory puts pressure on the CPU and Disk I/O.\Memory\Pages/sec Pages/sec is the rate at which pages are read from or writtento diskto resolve hard page faults. Hard page faults occurwhena process requires code or data that is not in its workingset or elsewhere in physical memory and must be retrievedfrom disk. Note that some paging will usually be presentbecause of the way the operating system works, but theoptimal level <strong>for</strong> averagepages/sec should be close to 0.