BT client software upgrades, users can modify the application of the port at will, so the result of this approach is not ideal.
1, flow control in the ascendant
So the more popular method at the moment is flow control. At present, many high-end broadband routers, Internet cafes dedicated routers have this function. The flow control function can classify the data stream according to the information of IP
last collect is 100,000 records, the Database tutorial table occupies 1.6G of hard disk. OK, look at the following SQL statement:
Select Id,title from collect limit 1000, 10; very soon; basically 0.01 seconds is OK, then look at the following
Select Id,title from collect limit 90000, 10; Start paging from 90,000, results?
8-9 seconds to complete, my God what's wrong??? In fact, to optimize t
90,000, results?
8-9 seconds to complete, my God what's wrong??? In fact, to optimize this data, the Internet to find the answer. Look at one of the following statements:
Select ID from collect order by ID limit 90000, 10; Soon, 0.04 seconds will be OK. Why? Because the ID primary key to do the index of course fast. On-line modification is:Select Id,title from
from Cyclopedia execution time is 390ms, performing the same operation time is also less than MySQL 360ms.
Let's take a look at tens pagination.
Data table collect (ID, title, info, VType) on these 4 fields, which title with fixed length, info with text, ID is gradual, VType is Tinyint,vtype is index. This is a simple model of the basic news system. Now fill in the data and fill in 100,000 pieces of
Select * from yanxue8_visit limit 0, 10
It is not an order of magnitude.
There are also many five limit optimization guidelines on the Internet, which are translated from the mysql manual. They are correct but not practical. Today I found an article about limit optimization, which is quite good. Original address: h
accepts for one client request at a time. This header includes not only the request-line, but also the general information header, the Request header field, and the length sum of the response header fields. This also limits the length of the URL to a considerable extent.
Nginx Server default limit is 4K or 8K, which is based on the hardware configuration of the server, usually the size of the memory page, the majority of the current is 4K, that is, 4
Cassandra data model (based on CQL to solve the problem of limit on the number of fat columns and flexibility) (Version 1.1 and later) describes Cassandra's programming model and data structure. Since the Cassandra version has been updated several times, Chinese documents on the Internet have become outdated, and repre
Today, the customer suddenly came to me to say that in the background to add an extra long article, all the background of the article is not displayed. The front-end display is Easyui, and the returned data is all in JSON. Following the same operation according to the customer's description, an error occurred during the firebug of the Ajax returned exception "serialization or JSON JavaScriptSerializer. The length of the string exceeds the value set on
Obtain data from the Internet and update the UI using sqlite in AndroidObtain data from the Internet and update the UI using sqlite in Android
Here, I mainly want to create1. First retrieve data from the Internet2. Store the obtained dat
sensitive to case sensitivity. So developers should be aware of the naming changes when using Sugarorm. You write a property name in the Bean, and the field name in the database is not. Of course, this can be done by @column annotations .The second problem is a habitual one. In development due to the need not to directly manipulate sqlitedatabase this type of class, so many people at the same time when the development of a person to commit the code only modified the corresponding bean structure
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