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Program | How performance enhances ASP program performance (2) 2000-08-11 · Compiling: Gan Ganping · Yesky Tip 6: Use session objects wisely Sessions have several drawbacks when they are used on a busy site. Busy means: Hundreds of pages are requested per second on the site, or thousands of users are being accessed at the same time. This technique is important

Program | How performance enhances ASP program performance (2) 2000-08-11 · Compiling: Gan Ganping · Yesky Tip 6: Use session objects wisely Sessions have several drawbacks when they are used on a busy site. Busy means: Hundreds of pages are requested per second on the site, or thousands of users are being accessed at the same time. This technique is important

Preface: In most cases, a table scan or index scan is not an efficient way to return a small amount of data, especially from a large table. These must be found and resolved to improve performance because the scan traverses each row, finds the eligible data, and returns the results. This kind of processing is quite time-consuming and resource-consuming. In the performance optimization process, generally foc

Label:In the initial SQL Server performance issue (1/4), we learned how to quickly check the number of tasks that are running on the server instance and the number of IO waits. This is a lightweight script that does not put any pressure on the server, even if the server is under high load and can get the results normally. The 2nd step in problem detection is to get a session that waits on any resource. The following script will help us get this inform

of the steps are added, no programs are changed, and performance is significantly improved. The following figure is that we use this method to optimize the build speed, only 50 seconds to complete the 1500-page article generation, achieve the goal optimization effect. Due to the increased operation of this scheme, lazy people use caution. Optimized single column document generation speed 2. Improve the

:# mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --iterations=5 --engine=myisam,innodb --debug-info -uroot -p123456 Perform a test, respectively, 50 and 100 concurrently, and perform 1000 total queries:# mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --debug-info -uroot -p123456 50 and 100 concurrently get a test result (Benchmark), the more concurrent the number, the longer it takes to complete all queries. For the sake of accuracy, multiple iterations can be tested sev

of Computing Technology of the Chinese Emy of sciences and head of the "Dragon core 1" Development Team, revealed that the recently developed enhanced type of Dragon Core 2 has reached the level of "four" in the middle and low grades. Hu weiwu said that in 586, we developed godson 1, with a performance equivalent to, a leap from having to having none. In 03, we developed godson

of the process (directory)--"for the benefit of other virus intrusion view illegal process." Stat Description:D a process that cannot be interruptedThe process of R run stateS Process in sleep stateT pause, Stop the processZ Zombie Process+ Foreground ProcessN Low-priority processesMemory paging is locked in memoryS master ProcessL Multithreading ProcessView network StatusNetstat (view TCP/IP communication status)Listening port: For other machines to exchange data with our server, access to the

Ash and awr relationships Ash is based on v$session, sampling once per second, recording events waiting for an active session. Inactive sessions are not sampled, and sampling work is done by the newly introduced background process MMNL.Ash memory record data is always limited, in order to save historical data, the introduction of the automatic load information base (Automatic Workload Repository, AWR) by the background process Mmon completed. The ash information is also collected and written out

cache, memcached does not allocate the memory for the dataOn a item by item basis.Instead, a slab allocation is used to optimize memory usage and preventMemory fragmentation when information expires from the cache.With slab allocation, memory was reserved in blocks of 1MB. The slab is divided to a number ofBlocks of equal size. When you try to store a value into the cache, memcached checks the size of theValue that is adding to the cache and determines which slab contains the right size allocat

First, the use of caching, that is, content expiration Enabling content expiration for static files can improve access performance. First, the site's directory to be divided into reasonable, pictures, CSS, JavaScript are placed in a separate directory, and then select the directory in IIS, point attribute-http header, enable content expiration, you can choose 30 days after the past, so that the user browser will compare the current date and due date,

ajax|js| Performance We will implement an AJAX-capable component that not only implements the actual process of uploading files to the server, but also "real-time" monitoring of file uploads. (iv) Progressmonitorfileitem class public class Progressmonitorfileitem extends Diskfileitem { Private Progressobserver Observer; Private Long passedinfilesize; ... Private Boolean Isformfield; ... @Override Public OutputStream Getoutputstre

urgently needed files, and Nginx has supported (Spdy's scenario is simpler). Now you need to decide whether to migrate to HTTP/2, and the key is to know how to make the most of it. This article will take you through the performance perspective of why this decision is made and how it is implemented. Next we will discuss 7 small suggestions about the performance