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浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以控制接收窗口的大小：
shell> sysctl -a | grep mem
net.ipv4.tcp_rmem = <MIN> <DEFAULT> <MAX>
如果我们出于传输性能的考虑，设置了一个足够大的缓冲，那么当大量请求同时到达时，内存会不会爆掉？通常不会，因为Linux本身有一个缓冲...
Downloading MySQL dump from command line
...backup.sql
You can even go as far as auto-compressing the output using gzip (if your DB is very big):
$ mysqldump -u [uname] -p db_name | gzip > db_backup.sql.gz
If you want to do this remotely and you have the access to the server in question, then the following would work (presuming the...
What is the difference between canonical name, simple name and class name in Java Class?
...rst.
I did this:
class ClassNameTest {
public static void main(final String... arguments) {
printNamesForClass(
int.class,
"int.class (primitive)");
printNamesForClass(
String.class,
"String.class (ordinary class)");
print...
Java Reflection: How to get the name of a variable?
...For example, take this simple class:
class TestLocalVarNames {
public String aMethod(int arg) {
String local1 = "a string";
StringBuilder local2 = new StringBuilder();
return local2.append(local1).append(arg).toString();
}
}
After compiling with javac -g:vars TestL...
How to select between brackets (or quotes or …) in Vim?
...
This is a highly useful tip. No more fumbling with extra keystrokes. Thank you for the link.
– Rai
Jan 18 '15 at 15:36
add a comment
...
I've found my software as cracked download on Internet, what to do?
...as between 20% and 70%. Even at the low end that's a significant amount of extra revenue.
share
edited Aug 25 '10 at 16:57
...
How to check whether a string contains a substring in JavaScript?
Usually I would expect a String.contains() method, but there doesn't seem to be one.
3 Answers
...
How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
...
Here's how I do it:
private string GetExcelColumnName(int columnNumber)
{
int dividend = columnNumber;
string columnName = String.Empty;
int modulo;
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName ...
performing HTTP requests with cURL (using PROXY)
...
@BipinVayalu, what do you want to check? At this way, what I describe above, the client uses the proxy "direct way", not transparently. So, the proxy gives the standard HTTP answers (including HTTP codes). If you export a wrong...
C# equivalent to Java's charAt()?
... we can use the charAt() method in Java get an individual character in a string by specifying its position. Is there an equivalent method in C#?
...