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MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C++内核技术
...：
shell> sysctl vm.drop_caches=1
平时可以通过mongo命令行来监控MongoDB的内存使用情况，如下所示：
mongo> db.serverStatus().mem:
{
"resident" : 22346,
"virtual" : 1938524,
"mapped" : 962283
}
还可以通过mongostat命令来监控MongoDB的内存使...
MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C++内核技术
...：
shell> sysctl vm.drop_caches=1
平时可以通过mongo命令行来监控MongoDB的内存使用情况，如下所示：
mongo> db.serverStatus().mem:
{
"resident" : 22346,
"virtual" : 1938524,
"mapped" : 962283
}
还可以通过mongostat命令来监控MongoDB的内存使...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...：
shell> sysctl vm.drop_caches=1
平时可以通过mongo命令行来监控MongoDB的内存使用情况，如下所示：
mongo> db.serverStatus().mem:
{
"resident" : 22346,
"virtual" : 1938524,
"mapped" : 962283
}
还可以通过mongostat命令来监控MongoDB的内存使...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...：
shell> sysctl vm.drop_caches=1
平时可以通过mongo命令行来监控MongoDB的内存使用情况，如下所示：
mongo> db.serverStatus().mem:
{
"resident" : 22346,
"virtual" : 1938524,
"mapped" : 962283
}
还可以通过mongostat命令来监控MongoDB的内存使...
Net::SMTPAuthenticationError when sending email from Rails app (on staging environment)
...ethod = :smtp
config.action_mailer.default_url_options = { :host => "my.ip.addr.here" }
config.action_mailer.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:domain => 'my.ip.addr.here:80',
:user_name => "my_email_name@gmail.com",
:password ...
What is the strict aliasing rule?
...an example that should not be surprising (live example):
int x = 10;
int *ip = &x;
std::cout << *ip << "\n";
*ip = 12;
std::cout << x << "\n";
We have a int* pointing to memory occupied by an int and this is a valid aliasing. The optimizer must assume that assignments...
从网购到火车票，对比淘宝12306网为何如此烂？ - 大数据 & AI - 清泛网 - ...
...点、电话订票等进行互斥。每张火车票都是独一无二的，网络售票只是数以万计的购票终端的一个终端而已，需要跟其他售票系统保持数据一致性。淘宝的商品只需要查询库存量就可以了。举个粗略的例子，火车票的供需关系可...
MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...：
shell> sysctl vm.drop_caches=1
平时可以通过mongo命令行来监控MongoDB的内存使用情况，如下所示：
mongo> db.serverStatus().mem:
{
"resident" : 22346,
"virtual" : 1938524,
"mapped" : 962283
}
还可以通过mongostat命令来监控MongoDB的内存使...
What are the Ruby Gotchas a newbie should be warned about? [closed]
...
Wikipedia Ruby gotchas
From the article:
Names which begin with a capital letter are treated as constants, so local variables should begin with a lowercase letter.
The characters $ and @ do not indicate variable data type as ...
How to write a scalable Tcp/Ip based server
...design phase of writing a new Windows Service application that accepts TCP/IP connections for long running connections (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
...