c profiler

In general, we use Profiler to track the operation of SQL Server, and sometimes we need to do some regular tracking to check the health of SQL Server for a certain period of time, because profiler does not support scheduling, so you should find a way to For us to start a trace by setting up a job, this article describes the use of T-SQL statements to enable tracing to suit this requirement. Example of star

0.000 0.571 0.000 timers.py:92 (get_number) 1 1.055 1.055 1.626 1.626 timers.py:96 (expensive_function) 1 0.000 0.000 0.000 0.000 {method ' disable ' of ' _lsprof '. Profiler ' Objects} As you can see, it gives the number of calls to different functions, but it misses out some key information: which function makes running so slow? However, this is a good start for basic optimization. Sometimes even less energy is available to find solution

the application shuts down. For more information, see the following documentation: browsing a Heap dump (browse heap dump) profiling an application VISUALVM includes a Profiler that you can use to perform profiling of applications running on the local JVM. You can access the profiling control in the "Profiler" tab of the Application tab. With this Profiler, you

Diagnosing database performance problems as doctors diagnose patients, it is necessary to combine their own accumulated experience and rely on scientific diagnostic reports to determine exactly where the source of the problem is. In the previous three articles we introduced many methods to optimize database performance, although it is important to master the optimization skills, but the diagnosis database performance problem is the premise of optimization, this article describes how to diagnose

Select All button on the invoice page , it takes 10 seconds to load the results. Focusing on a small, repeatable workflow will let you isolate the problem.the next question, of course, is why it takes 10 seconds? The first and simplest way to narrow down the problem is to run the application as close to SQL Server as possible on the same machine or on the same LAN.If you effectively eliminate any network latency and bandwidth throttling, it suddenly takes a second or less to select all invoices

In the first section of this chapter we also mentioned the performance bottleneck of using the query Profiler to locate a query, and here we describe in detail the purpose of Profiling and how to use it. To optimize a query, we need to know exactly where this query's performance bottleneck is, is it consuming too much CPU, or does it require too many IO operations? To be able to understand this information clearly, in MySQL 5.0 and the MySQL 5.1 offic

This is the second phase of the PHP performance optimization series. How to Use the PEAR tool Benchmark to get the execution time of code or functions line by line This is the second phase of the PHP performance optimization series. How to Use the PEAR tool Benchmark to get the execution time of code or functions line by line This is the second phase of the PHP performance optimization series. How to Use the PEAR tool Benchmark to get the execution time of code or functions line by line.T

Tcmalloc Overview: TCMalloc (Thread-CachingMalloc) implements the same functions as the standard glibc library's malloc, but TCMalloc is much more efficient and faster than standard malloc. TCMalloc is one of the google-perftools tools (four gperftools are: TCMalloc, heap-checker, heap-profiler, and Tcmalloc Overview: TCMalloc (Thread-Caching Malloc) implements the same functions as the standard glibc library's malloc, but TCMalloc is much more effici

Instruments tips for use About Instruments official has a very useful user to use guide, of course if not accustomed to the official English can be found here in the text translated version of PDF see. Instruments is really a powerful tool, It is extremely convenient to collect data about the performance and behavior of one or more system processes and to keep track of the data generated over time. Different types of data can also be widely collected. The basic use of instrument tools is not des

use a lot of memory. there is little specific advice that can be given about this, since the best approach to handle the amount of memory used will depend on your program's requirements. using a profiler may give you suggestions for where to optimize code by showing which parts of your program are using the most memory. Memory counters: By default, ants memory profiler uses the private bytes counter

methods can be aspected. the second approach is to generate a Child class inherited from the aspected class; it requires this class to be unsealed and it is limited to virtual methods. TheSystem. reflection. emitNamespace can be used. Besides of being limited to interface or virtual methods, this approach only supports the join points located at method boundaries (on entry, on exit, on exception ). Tools: Spring framework for. net Windsor Castle Aspect # Naspect Rapier L

In general, the memory usage of a normal system is basically stable after it runs stably, and should not increase without limit. Similarly, there is also a relatively stable upper limit on the number of objects used for any class, and it should not continue to grow. Based on this basic assumption, we can continuously observe the memory size used during system operation and the number of instances. If the memory size continues to grow, it indicates that the system has memory leakage, if the numbe

SQL unit testingby Alejandro Pelc, 2009/04/08 total article views: 4276 | views in the last 30 days: 4276 rate this | join the discussion | briefcase | print Introduction Some time ago, I was asked to configure automatic builds in team system for a solution, and that build shoshould include as much unit tests as it cocould. this solution contained a mix of web sites, a wizard installer, OLAP cubes, Reporting Services reports and a set of databases. because it was in the middle of a refactor, the

leakage of Java programs. There are already several professional Java memory leak check tools on the market. Their basic working principles are similar. They are all through monitoring the application, release, and other actions of all objects when Java programs are running, collects, analyzes, and visualizes all memory management information. Based on this information, developers will determine whether the program has a memory leakage problem. These tools include optimizeit

_text (Qs. SQL _handle) as St inner join(Select *From SYS. dm_exec_cached_plans CP cross applySYS. dm_exec_query_plan (CP. plan_handle)) DBOn Qs. plan_handle = dB. plan_handleWhere substring (St. Text, (Qs. statement_start_offset/2) + 1,(Case statement_end_offsetWhen-1 then datalength (St. Text)Else Qs. statement_end_offsetEnd-Qs. statement_start_offset)/2) + 1) Not like '% fetch %'Order by QS. total_elapsed_time/1000 DESC Use sqlserver profiler t

same, transactions with low overhead will be deprived. As shown in figure 3, we set the deadlock priority so that the transaction on the left is denied for rollback, as shown in figure 4. Figure 4. The spid with a lower priority is denied after the deadlock priority is set SQL Server Deadlock Detection First of all, we need to understand that in a multi-concurrency environment, deadlock is inevitable. We can only try to use reasonable database design and good indexing, appropriate query state

This is the second phase of the PHP performance optimization series. How to Use the PEAR tool Benchmark to get the execution time of code or functions line by line. To do what you want, you must first sharpen your skills! How to install PEAR and Benchmark Please refer to the first part of the PHP performance optimization series [PHP performance optimization preparation illustration PEAR installation] Benchmark tool package description Download: http://pear.php.net/package/Benchmark/downloadThe B

Use in learning job zend_dbMethod of invoking the tracker$Profiler = $Db-Getprofiler (); /* How to use the tracker */ Introducing the loader class (auto-load Class) Require_once ("zend/loader.php"); Introducing a DB class using the Loader class Zend_loader::loadclass ("zend_db"); Introducing the ZEND_DB State device Zend_loader::loadclass ("Zend_db_statement_pdo"); Configure Databas

Debugging and execution time of the Benchmark class in the PHP performance optimization tool. This is the second phase of the PHP performance optimization series. how to use the PEAR tool Benchmark to get the execution time of code or functions line by line. To do what you want, you must first sharpen your skills! How to install PEAR and Benchma this is the second phase of the PHP performance optimization series, and how to use the PEAR tool class Benchmark to get the execution time of code or f

In the first section of this chapter, we also mentioned using query profiler to locate the performance bottleneck of a query. Here we will detail the usage and usage of profiling. To optimize a query, we need to know exactly where the performance bottleneck of this query is. Is there too much CPU computing consumption or too many Io operations required? To get a clear understanding of this information, it can be easily done in the MySQL 5.0 and MySQ