大约有 6,887 项符合查询结果（耗时：0.0241秒） [XML]
MySQL high CPU usage [closed]
...log and most of the queries came from two table and the tables hadn't been indexed properly! it's only been about 10 minutes but here's the result: CPU load averages 0.48 (1 min) 0.95 (5 mins) 2.42 (15 mins) thanks very much
– Juddling
Aug 15 '09 at 18:16
...
Android List Preferences: have summary as selected value?
... // set first value by default
listPreference.setValueIndex(0);
}
listPreference.setSummary(listPreference.getValue().toString());
listPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
@Override
public boo...
Making custom right-click context menus for my web-app
...SS3 */
/* The whole thing */
.custom-menu {
display: none;
z-index: 1000;
position: absolute;
overflow: hidden;
border: 1px solid #CCC;
white-space: nowrap;
font-family: sans-serif;
background: #FFF;
color: #333;
border-radius: 5px;
padding:...
What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
... the operand width). x86's lzcnt does that, too, while bsr produces a bit-index that the compiler has to flip unless you use 31-__builtin_clz(x).
(The "undefined result" is not C Undefined Behavior, just a value that isn't defined. It's actually whatever was in the destination register when the i...
Get url parameters from a string in .NET
...energy+edge&rls=com.microsoft:en-au&ie=UTF-8&oe=UTF-8&startIndex=&startPage=1%22",
new Dictionary<string, string>
{
{ "q", "energy+edge" },
{ "rls", "com.microsoft:en-au" },
{ "ie", "UTF-8" },
...
Importance of varchar length in MySQL table
...u can run into: Big joins are nearly impossible with long varchar columns. Indexing on those columns are a real killer. Your disk has to store the data. One memory page can hold less rows and table scans will be much slower. Also the query cache will be unlikely to help you here.
You have to ask yo...
How can I set NODE_ENV=production on Windows?
...=production&&npm start
or
set NODE_ENV=production&&node index.js
The trick for it to work on Windows is you need to remove the whitespace before and after the "&&". Configured your package.json file with start_windows (see below) below. Then Run "npm run start_windows" at...
Create array of regex matches
...));
}
(if you have more capturing groups, you can refer to them by their index as an argument of the group method. If you need an array, then use list.toArray())
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...
When would I use XML instead of SQL? [closed]
...large data sets you need to implement a DBMS engine and a data format with indexes, logging and other artifacts of a DBMS - which (by definition) makes it something other than XML.
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How to use Session attributes in Spring-mvc
...
@Autowired
private User user
5.Pass HttpSession to method:
String index(HttpSession session) {
session.setAttribute("mySessionAttribute", "someValue");
return "index";
}
6.Make ModelAttribute in session By @SessionAttributes("ShoppingCart"):
public Strin...