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通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...统当前状态的参数，例如 /proc/sys/kernel/pid_max，/proc/sys/net/ipv4/ip_local_port_range 等等，从文件的名字大致可以猜出所限制的资源种类。由于该目录下涉及的文件众多，在此不一一介绍。有兴趣的读者可打开其中的相关文件查阅说明...
SSL handshake alert: unrecognized_name error since upgrade to Java 1.7.0
...aled that during the TSL/SSL Hello the warning
Alert (Level: Warning, Description: Unrecognized Name), Server Hello
Was being sent from the server to the client.
It was only a warning, however, Java 7.1 then responded immediately back with a "Fatal, Description: Unexpected Message", which I assume m...
What resources are shared between threads?
...
From Wikipedia (I think that would make a really good answer for the interviewer :P)
Threads differ from traditional
multitasking operating system
processes in that:
processes are typically independent, while threads ...
MySQL show current connection info
...(GPL)
Protocol version: 10
Connection: localhost via TCP/IP
Server characterset: latin1
Db characterset: latin1
Client characterset: gbk
Conn. characterset: gbk
TCP port: 3306
Uptime: 7 min 16 sec
Threads: 1 Questions: 21 Slow queri...
Where does Jenkins store configuration files for the jobs it runs?
...ns installation folder, you could create a simple jenkins job and run a script that tars all the config files for the jobs: "tar -zcvf jenkins-jobs-configs.tar.gz $(find ${JENKINS_HOME}/jobs -name config.xml -maxdepth 2) ". You could then archive jenkins-jobs-configs.tar.gz
– ...
When is the finalize() method called in Java?
...uld make sense is if your class manages some external resource (like a TCP/IP connection, file ... anything that the Java GC can't handle). In those cases the Closable interface (and the idea behind it) is probably what you want: make .close() close/discard the resource and require the user of your ...
How can I find out if I have Xcode commandline tools installed?
... answered Jan 22 '14 at 1:50
P iP i
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What is “overhead”?
...method that is being used. Examples:
Protocol overhead: Ethernet frames, IP packets and TCP segments all have headers, TCP connections require handshake packets. Thus, you cannot use the entire bandwidth the hardware is capable of for your actual data. You can reduce the overhead by using larger p...
Why would $_FILES be empty when uploading files to PHP?
...d be 100M not 100MB.
Make sure your <form> tag has the enctype="multipart/form-data" attribute. No other tag will work, it has to be your FORM tag. Double check that it is spelled correctly. Double check that multipart/form-data is surrounded by STRAIGHT QUOTES, not smart quotes pasted in fro...
Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
... always better to use Temp tables. Here is a nice blog article on it mssqltips.com/sqlservertip/2825/…
– gh9
Jan 25 '14 at 21:59
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