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Why am I getting “Cannot Connect to Server - A network-related or instance-specific error”?
...ation
Click on Surface Area Configuration for Services and Connections
Select the instance that is having a problem > Database Engine > Remote Connections
Enable local and remote connections
Restart instance
You may need to create an exception on the firewall for the SQL Server ...
libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...all
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
syslog(LOG_ERR, "--illegal memory access--");
while(unw_step(&cursor) > 0) {...
Hidden Features of MySQL
...that has an integer type,
you can also refer to the column as "_rowid" in SELECT statements.
In MySQL, the name of a PRIMARY KEY is PRIMARY
Currently, only InnoDB (v5.1?) tables support foreign keys.
Usually, you create all the indexes you need when you are creating tables.
Any column declared...
Search for all occurrences of a string in a mysql database [duplicate]
...
In phpMyAdmin a 'Search' feature is available:
Select particular database not table.
Click 'Search' tab
Enter the search term you want
Select the tables you want to search in
phpMyAdmin screen shot:
The 'Search' feature is also available in MySQL Workbench:
Databa...
Regular expression to match DNS hostname or IP Address?
...check separately that the total length of the hostname must not exceed 255 characters. For more information, please consult RFC-952 and RFC-1123.
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How to find SQL Server running port?
...
This is the one that works for me:
SELECT DISTINCT
local_tcp_port
FROM sys.dm_exec_connections
WHERE local_tcp_port IS NOT NULL
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...扑结构,在集群中总共跳跃节点的数量
udpport 694 #使用udp端口694 进行心跳监测
bcast eth1
ucast eth1 10.10.10.43 #采用单播，进行心跳监测，IP为对方主机
IPauto_failback on #on表示当拥有该资源的属主恢复之后，资源迁移到属主上
node share...
How do I see active SQL Server connections?
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when you have to filter for specific db selecting from sys.sysprocesses is better
– Iman
Dec 2 '13 at 4:29
2
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Select datatype of the field in postgres
...tion_schema (8.4 docs referenced here, but this is not a new feature):
=# select column_name, data_type from information_schema.columns
-# where table_name = 'config';
column_name | data_type
--------------------+-----------
id | integer
default_printer_id | integer
mast...
记录一些Mac OS X技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，再勾选允许访问的用户即可。
访问时使用本机的ip，端口为22，用户名和密码为该用户的Mac OS X的登录密码。
关闭鼠标加速度
Mac OS X的鼠标加速度很诡异，缓慢移动鼠标时几乎很难移动。
下载Mouse Acceleration Preference Pane这个...