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SSL Connection / Connection Reset with IISExpress
...rtificate:
On Start, type -> mmc.exe
File -> Add/Remove Snap-in...
Select Certificates -> Add> -> Computer account -> Local computer
Check under Certificates > Personal > Certificates
Make sure the localhost certificate that exist has a friendly name "IIS Express Developmen...
What are Runtime.getRuntime().totalMemory() and freeMemory()?
...he maximum memory. If you run with -Xms1024m -Xmx1024m, the value you get from totalMemory() and maxMemory() will be equal.
Also, if you want to accurately calculate the amount of used memory, you do so with the following calculation :
final long usedMem = totalMemory() - freeMemory();
...
INNER JOIN vs LEFT JOIN performance in SQL Server
...(ID, Name) VALUES (4, 'Four')
INSERT #Test2 (ID, Name) VALUES (5, 'Five')
SELECT *
FROM #Test1 t1
INNER JOIN #Test2 t2
ON t2.Name = t1.Name
SELECT *
FROM #Test1 t1
LEFT JOIN #Test2 t2
ON t2.Name = t1.Name
DROP TABLE #Test1
DROP TABLE #Test2
If you run this and view the execution plan, you'll se...
Copy file remotely with PowerShell
I am writing a PowerShell script that I want to run from Server A.
I want to connect to Server B and copy a file to Server A as a backup.
...
Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
...Many(mappedBy="parent", fetch=FetchType.EAGER)
@Fetch(value = FetchMode.SUBSELECT)
private List<Child> childs;
This should fix the issue, related to Hibernate bug HHH-1718
share
|
improve th...
Apache Spark: The number of cores vs. the number of executors
...es/s. For run 3 the steady utilization is doubled, around 100 M bytes/s.
From the cloudera blog post shared by DzOrd, you can see this important quote:
I’ve noticed that the HDFS client has trouble with tons of concurrent threads. A rough guess is that at most five tasks per executor can ach...
解决：ORA-01658: 无法为表空间space中的段创建 INITIAL 区 - 数据库(内核)...
...们对应的表空间大小有多少：
1、查看表空间总大小SQL：select tablespace_name,sum(bytes)/1024/1024 from dba_data_files group by tablespace_name;
2、查看表空间已使用大小及分配情况：
select SEGMENT_TYPE,owner,sum(bytes)/1024/1024 from dba_segments where tablesp...
phpcms与ucenter整合常见问题与解答 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...1536000;
$uid = intval($get['uid']);
$query = DB::query("SELECT uid, username, password FROM ".DB::table('common_member')." WHERE uid='$uid'");
if ($member = DB::fetch($query))
{
dsetcookie('auth', authcode("$member[password]\t$member[uid]", 'ENCODE')...
Sample settings.xml for maven
...mirrors
| This is a list of mirrors to be used in downloading artifacts from remote
| repositories.
|
| It works like this: a POM may declare a repository to use in resolving
| certain artifacts. However, this repository may have problems with heavy
| traffic at times, so people ha...
WebSockets vs. Server-Sent events/EventSource
...
Websockets connections can both send data to the browser and receive data from the browser. A good example of an application that could use websockets is a chat application.
SSE connections can only push data to the browser. Online stock quotes, or twitters updating timeline or feed are good examp...