sábado, 4 de febrero de 2012

SharePoint Performance Troubleshooting

Para ver el post completo: http://www.sharepointpromag.com/article/sharepoint-server-2010/sharepoint-performance-troubleshooting-141506


Windows Server Hardware Sizing

You need to correctly size your hardware to support the SharePoint tier that is being hosted. You'll also need to ensure that Windows Server has been optimized.

For the optimal RAM profile, examine what your app pools will require, multiply that number by the number of app pools that you expect to have, and then add half again as much to ensure room for growth and the occasional application that doesn't dispose properly:

(Required RAM) ´ (# of App Pools) ´ 1.5 = Proposed RAM Profile

Hard disk space is a fairly straightforward decision: 80GB is never going to be enough. Each web and application server will have its own Microsoft User Location Server (ULS), IIS, and event logs; copy of the 14 hive; and WinSxS directory. Add the need for a pagefile that doubles your RAM count and a desire to make sure that your server doesn't crash because you didn't have enough disk space. I recommend a minimum of 200GB per server -- 400GB if you can afford it. Rather than splitting drives into multiple partitions, keep a single, larger C partition to manage growth.

SQL Server Hardware Sizing

he SQL Server tier is the one in which you'll want to make your hardware investment. If you don't give SQL Server enough horsepower, you're sunk before you leave port. CPU and RAM are both crucial to SQL Server performance, but be aware that SQL Server will chew up as much RAM as it can get its teeth into, regardless of load

When sizing SQL, always consider which services you can separate out. The minimum requirements refer specifically to the relational database management system (RDBMS) engine, not taking into account any SQL Server Integration Services (SSIS), Reporting Services (SSRS), or Analysis Services (SSAS) needs that you might have. Separate these services onto their own hardware whenever possible, and address their specific hardware requirements as well.


    SQL Server Performance

    Pregrow your databases and set automatic growth parameters. Why are pregrowing databases and setting automatic growth parameters important? SQL Server is at its most efficient when it has a large block of contiguous space.

    One of the worst-performing base operations for SQL Server is its database growth operation. SQL Server goes out, finds available space on disk, and adds that space to the database. By default, this operation is set to grow by 1MB per operation. When a content database is created, it has a 20MB data file and a 3MB log file.

    If variable auto growth still needs to be a part of your maintenance strategy, consider these points:

    • Set standard autogrow to somewhere between 500MB to 1GB.
    • Create a daily maintenance job to check for the amount of free space in your database.
    • If the amount of free space is less than 10 percent, then grow free space at a scheduled time when users will not be affected

    the log files in SQL Server are high-intensity write, whereas the data files can be a healthy mix of both read and write. Based on this generality, the databases that SharePoint uses (other than TempDB, which is dominantly write-intensive) are generally read\write in nature. You can set up archival content databases that house read-only site collections, but the real power of SharePoint is in its collaboration functionality, which by its nature needs both read and write elements.

    The difficult decision regarding I/O is cost versus return. RAID 10 is extremely storage inefficient and costly but provides the best possible performance and redundancy. RAID 5 is storage efficient and provides redundancy, but you'll contend with a performance hit.

    SharePoint Web Server Load Testing

    Load testing is an often overlooked and highly disregarded art when it comes to SharePoint. We all plan to test for loads, but it seems rare that anyone actually takes the time to do so. There are several simple (as well as many more-complex) tools that allow you to load-test your environment:

    Load balancing in your SharePoint application tier. In SharePoint 2010, Microsoft seems to have done a good job with a simple feature called the Service Application Load Balancer. This feature serves round-robin requests to all listening service applications that can respond to a given request.

    Numerous Causes

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