Article Title: using Oracle storage to analyze Unix system performance (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
As an Oracle database administrator in UNIX systems, it is undoubtedly very important to monitor the operating system
/sandbox_canglong/test/tt. php[0x0000000003a00dc8] curl_exec ()/home/web/htdocs/sandbox_canglong/test/tt. php: 2[0x0000000003a00cd0] exfilter_curl_get ()/home/web/htdocs/sandbox_canglong/test/tt. php: 6
Log description:Script_filename is the entry fileCurl_exec (): it indicates that the execution time of this method exceeds the execution time.Exfilter_curl_get (): indicates that the method for calling curl_exec () is exfilter_curl_get ().The number after each colon is the row number.
After it i
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In this way, a nmon file is generated and updated every 10 seconds until 10 minutes later.The generated file name is hostname_0901__1306.nmon. "hostname" indicates the host name.
Generate Reports:Download nmon analyser (a free tool for generating performance reports ):Http://www.ibm.com/developerworks/wikis/display/Wikiptype/nmonanalyser
Upload the previously generated nmon data file to a Windows machine and use Excel to open the analysis tool nmon
/xdebug"
Xdebug. profiler_output_name = "cachegrind. Out. % t"
Xdebug. remote_enable = 1
Xdebug. remote_handler = dbgp
Xdebug. remote_host = localhost
Xdebug. remote_port = 9000
The "xdebug. profiler" option tells xdebug to analyze the performance of PHP code. The analysis result is output to the "D: \ temp \ xdebug" directory. The file is named "cachegrind. Out. timestamp.
Finally, rest
Using IOzone to analyze client side of NFSDon Capps (don.capps@hp.com)Tom McNeal (trmcneal@comcast.net)IOzone is a useful benchmark tool for analyzing file system performance, which can run on several different platforms, including Linux,hp-ux, Solaris, and so on. It uses file system IO as its primary test method, using a set of file IO requests to represent the perform
Article Title: using Oracle storage to analyze Unix system performance (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
4. Create the get_vmstat.ksh script
The script is used to regularly execute the vmstat command and save the result to the database.
# Get_vmstat.k
Recently I saw Lao Zhao blog "using profiler to analyze program performance" (http://www.cnblogs.com/JeffreyZhao/archive/2009/12/22/profiler-sampling.html ),
It was mentioned that in order to solve the problem of failure to trace method calls within the framework, Lao Zhao introduced the method of tracing with Profiler. many of his friends did not use profilter in vs versions.
I now use a third-party tool j
the direct execution of the Nmon command to monitor the system resource consumption in real time:CPU, memory, disk, and network consumption are all visually displayed.Three. Generate the Nmon report.1). Collect Data:#nmon-s10-c60-f-m/home/Parameter explanation:The-S10 collects data every 10 seconds.-c60 collected 60 times, that is, the acquisition of 10 minutes of data.-F generates a data file name that contains the time when the file was created.The storage directory of the data files generate
, memory, disk, and network consumption are all visually displayed.Three. Generate the Nmon report.1). Collect Data:#nmon-s10-c60-f-m/home/Parameter explanation:The-S10 collects data every 10 seconds.-c60 collected 60 times, that is, the acquisition of 10 minutes of data.-F generates a data file name that contains the time when the file was created.The storage directory of the data files generated by-M.This generates a Nmon file and updates every 10 seconds until 10 minutes later.The generated f
First, prefaceIn recent times, there have been two problems with websites:1. Memory usage increases slightly until the server memory fills up.2. When you visit a page, the page responds too slowly and the CPU stays high.An initial estimate of memory growth may be due to the fact that there are unsaved resources that are taking up memory, and that the CPU is high probably because of the time-consuming operations performed.Here we use the Ants Performance
for the project.
Files contained by Auto_prepend_file and Auto_append_file are parsed in this mode, but some limitations, such as functions, must be defined before they are called.
Modify sampling frequencyBy default, Xhprof runs every time, and the online environment is set up to have performance implications.xhprof.inc.php$profiling= !(Mt_rand()%9); if($profiling)Xhprof_enable(xhprof_flags_memory|xhprof_flags_cpu);register_shutdown_fu
Analyze the performance and flaws of the SQL Server Synchronization tool you wrote1. C # Synchronous SQL Server database schema2. C # Synchronizing data in a SQL Server database--Database synchronization tool [synchronizing new data]By testing the synchronization program I wrote, I concluded: 1. The first time the program calls the SqlBulkCopy will take longer than 2. The synchronization program is relative
To analyze the performance of inserting massive data into the Cassandra Cluster or Oracle, that is, the insertion rate, we sampled the inserted data using a Java program, and finally plotted the sample results with Jfreechart.
For the sake of fairness, we did the following:
1. All the loop variables are placed outside the loop
2. For Cassandra, the Replication-factor setting is 1, so inserting the data d
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