performance tuning for tile based architectures

... destroy performance What are the benefits of SQL code tuning? SQL code tuning can increase performance between 25% and 100%, sometimes much more In rare situations, I have seen enormous performance ... Automated SQL Tuning Part III: Physical and Configuration Tuning 14 15 16 17 18 19 Tuning Oracle Database File Structures Object Tuning Low-Level Physical Tuning Hardware Resource Usage Tuning Tuning ... configuration tuning SQL code tuning can help performance immensely but should be performed in development and testing environments first Data model tuning may be required if SQL code tuning does...

Ngày tải lên: 24/01/2014, 04:20

... 522 Network Performance 523 Application Performance 523 Presentation Performance 524 Client Hardware Performance 524 Summary 524 34 Tuning the Client ... help you in investigating performance problems Chapter 7, Performance Engineering Starts at the Design Stage,” explains the holistic approach to performance engineering Performance should be engineered ... can help you investigate performance problems Chapter 7, Performance Engineering Starts at the Design Stage,” explains the holistic approach to performance engineering Performance should be engineered...

Ngày tải lên: 17/02/2014, 15:20

... DESIGN, ANALYSIS, AND PERFORMANCE EVALUATION FOR HANDSHAKING BASED MAC PROTOCOLS IN UNDERWATER ACOUSTIC NETWORKS NG HAI HENG (B.Eng (Hons), MMU ) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR ... throughput performance of MAC protocols in static multi-hop wireless networks We first present a simple, adapted MACA MAC protocol, which can serve as a reference MAC for a better performance benchmarking ... benchmarking protocol for more advanced underwater handshaking -based MAC protocols We aim to enhance channel utilization of handshaking -based MAC protocols, which in turn will offer performance gains...

Ngày tải lên: 09/09/2015, 18:49

... of performance tuning is to make sure that your applications don’t use too much memory If they do, you cannot run many servers, and therefore in most cases, under a heavy load the overall performance ... out) There are many other things GTop can for you—please refer to its manpage for more information We are going to use this module in our performance tuning tips later in this chapter, so you ... Concurrency Level: Time taken for tests: Complete requests: Failed requests: 324 Apache/1.3.25-dev localhost 8000 10 5.843 seconds 5000 | Chapter 9: Essential Tools for Performance Tuning This is the Title...

Ngày tải lên: 26/01/2014, 07:20

... function as a key parameter to evaluate the performance In our paper, we concentrate on the performance optimization only for the delay-tolerant and contentionbased applications runs in IEEE 802.16 ... to optimize the performance of IEEE 802.16 -based MAC protocol, such as fixed WiMAX, Mobile WiMAX, DOCSIS, WiBro, and IEEE 802.20 MAC protocols We only analysed the performance for the delay-tolerant ... we want to analyse the performance for delaytolerant and contention -based application, then we take EURASIP Journal on Wireless Communications and Networking contention -based polling mechanism...

Ngày tải lên: 21/06/2014, 23:20

... Application Performance Tuning PHP Web Projects for Maximum Performance ■■■ Armando Padilla and Tim Hawkins Pro PHP Application Performance: Tuning PHP Web Projects for Maximum Performance Copyright ... TECHNIQUES Server Information Document Information Connection Information Connection Metrics Breakdown Figure 1–5 Sections of an ab result Server Information The server information section contains ... measure not only how well our current, unmodified application is performing, but also how well it’s performing once we apply the performance enhancements to it Apache Benchmark, as well as Siege,...

Ngày tải lên: 12/08/2014, 23:22

... optimizing for performance Summary In this chapter, the goal was to give you a look at the tools available for conducting benchmarking tests and point out the important features of each tool used for ... help us grade how well a web page conforms to these rules within the next section YSlow YSlow is a web page performance analyzing tool created by the Yahoo Performance group The tool is a Firebug ... information The plug-in retrieves information about the specific web page you’re currently on and presents the information within its different tabs ■ Note Firebug contains many helpful tabs for...

Ngày tải lên: 12/08/2014, 23:23

... RENDERING PERFORMANCE Statistics Tab The Statistics tab, like the Grade tab, provides a bit more insight into how we can improve the rendering performance The Statistics tab contains information ... the number of resources fetched increases the rendering performance for your user 41 k CHAPTER ■ IMPROVING CLIENT DOWNLOAD AND RENDERING PERFORMANCE Optimization Tools With the exception of the ... to use GIF for logos and small icons 49 CHAPTER ■ IMPROVING CLIENT DOWNLOAD AND RENDERING PERFORMANCE within a page, JPEGs for photographs or high-quality images, and finally PNGs for everything...

Ngày tải lên: 12/08/2014, 23:23

... which can increase the performance of your application, such as the following: • • Calculating the length of a for loop in advance • Using foreach instead of while and for when accessing elements ... fetch the Opcode for a specific PHP script Installing APC As stated before, APC is available for both Windows and Unix -based systems At the time of this writing, the version for APC was at 3.1.3 ... profile information for Listing 3–26 Figure 3–10 contains five total function calls that also include our root, or top-level main function, which invokes the other functions Based on the information...

Ngày tải lên: 12/08/2014, 23:23

... process as well as measure performance improvements when using PHP eA 0.9.6.1 is suitable for PHP and all versions of PHP 5, and can be installed on both Windows and Unix -based systems The full documentation ... makes it easy for developers to view how our APC cache is doing by providing an admin tool with information regarding the settings APC is currently running, the total size allocated for caching, ... cache information, such as the version of both APC and PHP the web server is running, the web server software name, the type of shared memory, file caching information, memory usage information,...

Ngày tải lên: 12/08/2014, 23:23

... Server Type Description Prefork Process -based web server; for each incoming request, a forked process is used to satisfy the request Threaded Thread -based web server; for each incoming request, ... prefork web server allows the web server to create a separate process (fork) based off an original process Web servers that operate as a prefork server type tend to create a pool of processes for ... single CPU, when comparing prefork to threading and to workers, there is favorable performance in the preforking server type As the concurrency level increases, preforking remains at a constant,...

Ngày tải lên: 12/08/2014, 23:23

... Determining the Performance of Your Web Server In Chapter 1, we saw how to use benchmarking tools to determine the performance of your web service The method outlined works well for static tests, ... the results for the Apache web server are shown in Figure 6–12, and the results for Nginx are shown in Figure 6–13 Figure 6–12 ab results for Apache web server Figure 6–13 ab results for Nginx ... time per request for the apache server stood at 8,480.315 milliseconds or 8.5 seconds That would mean that a user would wait for almost ten seconds for a response from the server before the browser...

Ngày tải lên: 12/08/2014, 23:23

... immediately before the directives that define your log file LogFormat "%{X-Forwarded -For} i %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"" forwarded CustomLog "logs/mysite-access_log" forwarded ... hosts to use this format without having to decleare each one seperately, then add it into your httpd.conf file immediately before your vhosts are defined LogFormat "%{X-Forwarded -For} i %l %u %t ... searches for the default file in the order they are specified in the directive Make sure that the most relevant name for your particular application is placed first in this list For example, for a...

Ngày tải lên: 12/08/2014, 23:23

... writes, speeds up performance, and reduces I/O load on the drives CHAPTER ■ DATABASE OPTIMIZATION Finding Problem Queries Tuning the server configuration is only one way of improving performance By ... performance By far the most common source of performance issues is badly structured queries or missing indexes MySQL has a built-in mechanism for logging low performance queries to a log file, so that ... General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance Reduce your overall MySQL memory footprint for system stability Temporary table size is already large - reduce...

Ngày tải lên: 12/08/2014, 23:23

... optimizing, 27 optimizing with Firebug, 28–33 results for Apache Benchmark connection information, 9–10 overview of, script information, server information, for Siege individual request details, 17 test ... logic, 79 page counter using APC caching for, 120 using Memcached for, 126 PHP code example, 75 php.ini APC settings, 88 php.ini eA settings for Unix, 101 for Windows, 103 PHP.ini properties, 75 ... 85–86 tools for, 86 240 XCache, 95–99 Opera browser, 42 operating parameters and storage engines, 194 optimization tools, JavaScript for minification, 46–47 for optimization, 42–43 for placement,...

Ngày tải lên: 12/08/2014, 23:23

... environmental performance (electric energy saving, and reduction of CO2 emission) The two following Figures 13 and 14 show the performance indexes for all the optimal cases Figure 13 Economic performance ... and performance parameters In this research was determined the energetic-economic performances of air-conditioning systems powered by solar energy and to compare with the energetic-economic performance ... annual quantity of CO2 saved and not blow in environment) For all solar configurations, was defined the next performance index: - Economic performance index I p1 : I p1 = C Inv ,max − C Inv C Inv...

Ngày tải lên: 05/09/2013, 14:58

... Wu C Profit performance optimization for an irreversible Carnot refrigeration cycle Int J Ambient Energy, 2008, 29(4): 197-206 [27] Chen L, Zheng Z, Sun F Maximum profit performance for a generalized ... exergoeconomic performance bound and optimization criteria for two-heat-reservoir refrigerators Chinese Sci Bull., 1991, 36(2): 156-157 (in Chinese) [20] Chen L, Sun F, Wu C Exergoeconomic performance ... law on finite time exergoeconomic performance of a Carnot heat pump Energy Convers Mgmt., 1998, 39(7): 579-588 [25] Chen L, Sun F, Wu C Maximum profit performance for generalized irreversible Carnot...

Ngày tải lên: 05/09/2013, 15:28

... exergoeconomic performance bound of the endoreversible refrigerator approaches to the finite-time thermodynamic performance bound Therefore, the finite-time exergoeconomic performance bound ( ... finite-time exergoeconomic performance bound Therefore, from the above analysis, one can find that the effect of the price ratio ψ ψ on the finite-time exergoeconomic performance bound is larger: ... (COP) for the endoreversible refrigeration cycles Moreover, performance analysis and optimization of the model are carried out in order to investigate the effect of cycle process on the performance...

Ngày tải lên: 05/09/2013, 17:08

... Oracle8i Performance Tuning Chapter starts with an overview of the Oracle Tuning Methodology and how it is used to perform effective database tuning Chapter discusses the sources of information ... pass the OCP: Oracle8i Performance and Tuning and OCP: Oracle8i Network Administration exams The first part of the book covers the most critical areas of database performance tuning and how to follow ... Administration and Backup & Recovery Study Guide 1Z0024 Oracle8i: Performance and Tuning 57 38 67% OCP: Oracle8i™ DBA Performance Tuning and Network Administration Study Guide 1Z0025 Oracle8i: Backup...

Ngày tải lên: 18/10/2013, 18:15

... Dynamic Performance Views These dynamic performance views contain information on the current setting for the Database Resource Manager Enterprise DBA Part 2: Performance Tuning ... 15-4 Enterprise DBA Part 2: Performance Tuning Workshop Types of Tuning Types of Tuning Types of Tuning • Routine tuning • Focused tuning • What-If tuning Copyright © Oracle ... information to create the new database tuning session 15-8 Enterprise DBA Part 2: Performance Tuning Workshop Tuning Session Scope Tuning Session Scope Tuning...

Ngày tải lên: 19/10/2013, 11:15