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  • Java Web Server with Jetty - TCP Connections Taking Long

    - by daysleeper
    I have an application with fairly high traffic (20K req/min) running on the JVM with a Jetty servlet container on Ubuntu. Below is my Jetty configuration: 10 20 2000 2 When I analyze the network traffic, I realize that sometimes it is taking long to establish TCP connections on the port that Jetty is running. The long connections are varying between 3.0s and 9.0s. The port is configured to accept MAX number of TCP connections. Do you know what might be causing the delay in accepting connections? Thanks

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  • How often does a Linux check it's /etc/localtime file

    - by DarkSheep
    I am trying to troubleshoot a problem. Some very helpful information would lead me to a solution is: Often does Linux check the /etc/localtime file? Additionally if there is a configuration file to increase the frequency (for testing) that would be helpful. Normally I would assume that it would check when a call to the ntp server has been executed, but NTP is not installed. It couldn't possibly check every time the date function is called as this would result in many problems on busy web servers. Server is Ubuntu 12.04, but I don't think that is relevant to the question.

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  • how to create a web part to track page creation time

    - by George2
    Hello everyone, I am new to SharePoint Server 2007 Web Part, and I am using SharePoint Server 2007 on Windows Server 2008. I program using VSTS 2008 + C# + .Net 3.5. I want to create a simple web part which could display page creation time and modified time (display such time information at the bottom of a web page). Any reference code samples or tutorials -- anything helpful for a newbie of SharePoint 2007 Web Part or this specific time tracking issue is helpful. thanks in advance, George

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  • Convert a time to specified time zone using C#?

    - by Ravi
    I'm working on an application in C# with .Net 3.5. I have time zone value of the User is stored in DB with this format (-05:00,1), where -5.00 represents EST time zone value and the 1 indicates that this time zone follows daylight saving (if 0 not a daylight saving zone). Now I want to convert any date time value into this timezone value considering the daylight saving value. Any help is appreciated. Thanks

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  • Fast, cross-platform timer?

    - by dsimcha
    I'm looking to improve the D garbage collector by adding some heuristics to avoid garbage collection runs that are unlikely to result in significant freeing. One heuristic I'd like to add is that GC should not be run more than once per X amount of time (maybe once per second or so). To do this I need a timer with the following properties: It must be able to grab the correct time with minimal overhead. Calling core.stdc.time takes an amount of time roughly equivalent to a small memory allocation, so it's not a good option. Ideally, should be cross-platform (both OS and CPU), for maintenance simplicity. Super high resolution isn't terribly important. If the times are accurate to maybe 1/4 of a second, that's good enough. Must work in a multithreaded/multi-CPU context. The x86 rdtsc instruction won't work.

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  • How to manipulate a string, variable in shell

    - by user558134
    Hei everyone! I have this variable in shell containing paths separated by a space: LINE="/path/to/manipulate1 /path/to/manipulate2" I want to add additional path string in the beginning of the string and as well right after the space so that the variable will have the result something like this: LINE="/additional/path1/to/path/to/manipulate1 additional/path2/to/path/to/manipulate2" Any help appreciated Thanks in advance

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  • Using BASH - Find CSS block or definition and print to screen

    - by Brian
    I have a number of .css files spread across some directories. I need to find those .css files, read them and if they contain a particular class definition, print it to the screen. For example, im looking for ".ExampleClass" and it exists in /includes/css/MyStyle.css, i would want the shell command to print .ExampleClass { color: #ff0000; }

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  • What the best multi-thread application debugger for C++ apps.

    - by Coredumped
    I'm looking for a good multi-thread-aware debugger, capable of showing performance charts of application threads on Linux, don't know if such a thing exists, perhaps as a Eclipse plugin. The idea would be to track per thread memory allocation a CPU usage as well as being able to interrupt a thread and examine its stack trace, local vars, etc. It does not have to be an eclipse plugin or a free tool, do any of you have heard of something similar?

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  • test remote file if directory

    - by soField
    HOSTNAME=$1 #missing files will be created by chk_dir for i in `cat filesordirectorieslist_of_remoteserver` do isdir=remsh $HOSTNAME "if [ -d $i ]; then echo dir; else echo file; fi" if [ $isdir -eq "dir" ] then remsh $HOSTNAME "ls -d $i | cpio -o" | cpio -id else remsh $HOSTNAME "ls | cpio -o" | cpio -id fi done i need simple solution for checking remote file is directory or file ? thanks

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  • Is this safe? Is this OK to do in MYSQL?

    - by alex
    I have always done this: mysqldump -hlocalhost -uuser -ppass MYDATABASE > /home/f/db_backup/MYDATABASE.sql mysql -uuser -ppass MYDATABASE < MYDATABASE.sql But, if I do this instead...is this safe? Is this identical to the above??? mysqldump -hlocalhost -uuser -ppass MYDATABASE | gzip > /home/f/db_backup/MYDATABASE.sql.gz zcat MYDATABASE.sql.gz | mysql -uuser -ppass MYDATABASE

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  • what's the use of 0 in wait system call?

    - by Supereme
    Hi, The syntax for the wait system call is pid= wait(&var) where pid is the process id of child and var is the variable which will contain the reason for exiting child. But what happens when we use wait((int *)0)? What does it exactly mean? Thank you.

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  • How can I map UIDs to user names using Perl library functions?

    - by Mike
    I'm looking for a way of mapping a uid (unique number representing a system user) to a user name using Perl. Please don't suggest greping /etc/passwd :) Edit As a clarification, I wasn't looking for a solution that involved reading /etc/passwd explicitly. I realize that under the hood any solution would end up doing this, but I was searching for a library function to do it for me.

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  • Best way to install web applications (e.g. Jira) on Unixes?

    - by gineer
    Can you throw some points on how it is a best way, best practice to install web application on Unixes? Like: where to place app and its bases and so for, how to configure to be secure and easy to backup, etc For example I know such suggestion -- to set uniq user for each app. App in question is Jira on FreeBSD, but more general suggestions are also welcomed.

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  • Use date time control that blackberry device uses

    - by SWATI
    In Blackberry device if we go to Options --- Date/Time ----Use Network Time -- No Now when we select date or time a very stylish selector opens up that enables user to set date and time. Can i use such control in my app. I saw such in Storm 9530 Any idea please help!!!!!!!!!!!!!!!!

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  • malloc in kernel

    - by yoavstr
    when i try to malloc at kernel mod i get screamed by the compiler : res=(ListNode*)malloc(sizeof(ListNode)); and the compiler is screaming : /root/ex3/ex3mod.c:491: error: implicit declaration of function ‘malloc’ what should i do ?

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