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Data Execution Prevention (DEP) details, issues, and options

Data Execution Prevention (DEP) is a relatively new feature of both Intel and AMD hardware that is supported beginning with Windows Server 2003 Service Pack 1 and Windows XP Service Pack 2. DEP is a set of related hardware and software features designed to make it more difficult for malicious programs to execute sensitive code […]

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Use DmPerfss.cfg to exclude Performance Library DLLs that cause collection problems

NTSMF version 2.4.6 and higher utilizes a facility that allows you to specifically exclude Performance Library DLLs that cause collection problems. Instructions to exclude specific Performance Library (Perflib) DLLs are contained in an optional configuration file named DmPerfss.cfg that is stored in the NTSMF root directory. The format of theDmPerfss.cfg file, which use a simple XML […]

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How does the Performance Sentry collection service work?

The Performance Sentry collection service gathers performance Objects and Counters from the Windows Server operating system and writes them to the NTSMF collection file. Using Performance Sentry, you can collect any of the performance Objects that are available on your machine, including performance statistics on resource usage, networking, and application performance. In addition, Performance Sentry […]

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What is the minimum sampling period for Performance Sentry?

The minimum collection interval for Performance Sentry and NTSMF is 1 second. However, in most cases collecting at a 1 second interval may not be practical. For customers who do require less than 60 second sample intervals we recommend that they pare their data collection sets down to the absolute minimum number of counters for […]

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Is the Performance Sentry User Guide available online

Yes, the Performance Sentry User Guide can be viewed here. You can download other documentation at www.demandtech.com/downloads under ‘Documentation’.

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Help! Do you know if there are any interesting Active Directory Objects or Counters?

NTDS is the main source of information on Active Directory traffic to and from Domain Controllers. It contains a ton of interesting looking counters. Unfortunately, there is not much written that documents AD performance issues and how to use these counters. This TechNet overview article is a good place to start. There are two main […]

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What can you tell me about Virtual Memory?

We have two White Papers that will help you get a better understanding of Virtual Memory: CONSTRAINTS IN 32Bit WINDOWS and CONSTRAINTS IN 32Bit WINDOWS – An Update  

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Is there a simple way to tune my Disks?

Absolutely! You can simply follow the instructions on this White Paper: SIMPLIFIED DISK TUNNING

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“Have you ever wondered how to determine the logical disk size looking at Performance Monitor performance metrics?”

It is easy, but requires some calculation. First, look at the logical disk object and add the ‘’% Free Space” and “Free Megabytes” counters to the Perfmon display. Then switch to ‘Report View’. Figure 1. Figure 1. Simply divide Free Megabytes by Free Space (remember this is a percentage, so the displayed value must be […]

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What do these SQL Server counters mean?

MS SQL Server tuning is very similar to any other powerful Database Management System (DBMS), with similar performance and tuning considerations. For example: 1. How effective are the memory-resident database buffers at reducing disk I/O? 2. Where have you placed the database transaction recovery log files? 3. Does the database design minimize contention for SQL […]

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