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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...也可以解决多用户需要同时访问外网但公有IP地址不足的问题。同时可以作为一个防火墙，隔离内网与外网，并且能提供监控网络和记录传输信息的功能，加强局域网的安全性等。它的主要作用有以下几点。
1．共享网络
2．...
Favourite performance tuning tricks [closed]
...les (possibly archive the deleted records)
Consider doing this automatically once a day or once a week.
Rebuild Indexes
Rebuild Tables (bcp data out/in)
Dump / Reload the database (drastic, but might fix corruption)
Build new, more appropriate index
Run DBCC to see if there is possible corru...
Redis is single-threaded, then how does it do concurrent I/O?
...n how you define concurrency.
In server-side software, concurrency and parallelism are often considered as different concepts. In a server, supporting concurrent I/Os means the server is able to serve several clients by executing several flows corresponding to those clients with only one computatio...
How to resize an Image C#
... whether lines, curves, and the edges of filled areas use smoothing (also called antialiasing) -- probably only works on vectors
graphics.PixelOffsetMode affects rendering quality when drawing the new image
Maintaining aspect ratio is left as an exercise for the reader (actually, I just don't thin...
Override back button to act like home button
... like stop animations and other things that consume a noticeable amount of CPU in order to make the switch to the next activity as fast as possible, or to close resources that are exclusive access such as the camera.
share
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Condition within JOIN or WHERE
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The relational algebra allows interchangeability of the predicates in the WHERE clause and the INNER JOIN, so even INNER JOIN queries with WHERE clauses can have the predicates rearrranged by the optimizer so that they may already be excluded durin...
How often should you use git-gc?
...ons that could create many loose objects." Anyone know which commands actually run it?
– Joshua Dance
Jul 8 '14 at 15:36
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Hibernate lazy-load application design
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As we all known, hibernate tries to be as non-invasive and as transparent as possible
I would say the initial assumption is wrong. Transaparent persistence is a myth, since application always should take care of entity lifecycle ...
What's the equivalent of Java's Thread.sleep() in JavaScript? [duplicate]
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Spinning a loop cause High CPU utilization.
– Niger
Sep 19 '09 at 1:10
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Why is ArrayDeque better than LinkedList
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Also another small disadvantage (for real-time applications) is that on a push/add operation it takes a bit more when the internal array of the ArrayDeque is full, as it has to double its size and copy all the data.
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