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Android微信智能心跳方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...息及时性的前提下，根据网络类型自适应的找出保活信令TCP连接的尽可能大的心跳间隔，从而达到减少安卓微信因心跳引起的空中信道资源消耗，减少心跳Server的负载，以及减少部分因心跳引起的耗电。
主要方法是参考WhatsApp...
Freeing up a TCP/IP port?
...tening for http requests on port 80 (run as root or use sudo):
# fuser 80/tcp
If you want to kill them, then just add the -k option.
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Can't connect to localhost on SQL Server Express 2012 / 2016
... If not, start it.
You need to make sure that SQL Server is allowed to use TCP/IP or named pipes. You can turn these on by opening the SQL Server Configuration Manager in Start > Programs > Microsoft SQL Server 2012 > Configuration Tools (or SQL Server Configuration Manager), and make sure ...
Keep-alive header clarification
...this info kept ("this connection is between computer A and server F")?
A TCP connection is recognized by source IP and port and destination IP and port. Your OS, all intermediate session-aware devices and the server's OS will recognize the connection by this.
HTTP works with request-response: cli...
Who is listening on a given TCP port on Mac OS X?
On Linux, I can use netstat -pntl | grep $PORT or fuser -n tcp $PORT to find out which process (PID) is listening on the specified TCP port. How do I get the same information on Mac OS X?
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Can two applications listen to the same port?
... differs depending on what OS is being considered. In general though:
For TCP, no. You can only have one application listening on the same port at one time. Now if you had 2 network cards, you could have one application listen on the first IP and the second one on the second IP using the same port ...
When is TCP option SO_LINGER (0) required?
...TIME_WAIT state, tying up all the available resources on a server.
When a TCP connection is closed cleanly, the end that initiated the close ("active close") ends up with the connection sitting in TIME_WAIT for several minutes. So if your protocol is one where the server initiates the connection c...
Why is SCTP not much used/known
...Stevens and I found that there is a third transport layer standard besides TCP and UDP: SCTP .
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What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...ng infinite performance from hardware, can a Linux box support >65536 open TCP connections?
3 Answers
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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
....181.124.108 application/x-javascript
1346398516.767 17157 192.168.2.22 TCP_MISS/000 0 GET http://www.gougou.com/js/input-ac.js - DIRECT/www.gougou.com -
1346398516.767 17188 192.168.2.22 TCP_HIT/000 0 GET http://www.gougou.com/ - DIRECT/www.gougou.com -
修改squid.conf 文件，避免其他...