[. Net Object-Oriented programming advanced] (15) caching (Cache) (2) Using Cache to improve program performance and javacache caching
[. Net Object-Oriented programming advanced] (15) Cache (ii) using Cache to improve program performance
This section introduces:
In the previous section, the cache technology exchanges
class to improve the performance of ASP, but there are some deficiencies in using the cache class, such as we cannot specify the size of the memory used by the cache class, and the data cached in the cache is not accessed directly by an application on another machine, so this article presents another Data caching scheme, that is, the use of distributed cache. The distributed cache is characterized by the f
should consider implementing caching at all program levels.
Steve's cache prompt
Early cache; frequent Cache
You should implement caching at each layer of the application. Add cache support to the data layer, business logic layer, UI, or output layer. Memory is currently very cheap-therefore, implementing caching in the entire application in a smart way can greatly improve performance.
Cache can prevent ma
should consider implementing caching at all program levels.
Steve's cache prompt
Early cache; frequent Cache
You should implement caching at each layer of the application. Add cache support to the data layer, business logic layer, UI, or output layer. Memory is currently very cheap-therefore, implementing caching in the entire application in a smart way can greatly improve performance.
Cache can prevent ma
Ad_user where is_active= ' Y ' order by value;
In this query statement, two columns are used. In the WHERE query statement, the record of the activity in the query table. The condition of a constant is used at this time. In the ORDER BY clause, the values of the Value column are sorted. If you are in a table design, set an index for this field. When you use thi
Use local indexes to improve PostgreSQL Performance
You may not know that PostgreSQL supports partial indexing of table data? Its advantage is that it can accelerate the reading speed of the indexed data without additional overhead. the best way is to index the data that is read repeatedly based on the given WHERE clause. this is suitable for some specific analysis workflows that require aggregation computi
July 2004 issue of the MSDN Magazine's Cutting Edge column. The cache schema for ASP. NET is as follows: V. Pre-Request cachingIn front of me, I mentioned that even if we only made a small performance improvement in some places, we could get a big performance boost, and I like to use pre-request caching to improve the perf
30th-Improving performanceThis chapter will review some of the key points related to MySQL performance.30.1 Improving performanceDatabase administrators spend a considerable portion of their lives tuning, experimenting to improve DBMS performance. Poorly performing databases (and database queries) are often the most common culprit in diagnosing sluggish behavior
a condition, then the efficiency of the query will improve. Let's check it out: Here we assume the query 100,001th data, the amount value of this data is: 2399927, we write two statements are as follows: Db.test.sort ({"Amount": 1}). Skip (100000). Limit () //183msdb.test.find ({amount:{$gt: 2399927}}). sort ({" Amount ": 1}". Limit (Ten) //53ms The results ha
worry about the impact of performance. To maximize caching in your applications, you should consider ways to implement caching at all program levels.
Steve's Caching Tips
? Cache as early as possible;
You should implement caching at every level of your application. Add caching support to the data tier, business logic tier, UI, or output layer. Memory is now very cheap-therefore, a great performance impro
information, comment-set the blog post itself-for inference, it can be seen that 10-20 database queries and formatting may be required to display the content of the home page. This process is repeated every day for hundreds or even thousands of pages, so the queries executed by your servers and applications are much more than the ones required to display the page content.
By using memcached, you can store the formatted Information loaded from the database as a format that can be directly used o
backup on the normal operation of the database.
Typical application 4: Sorting large tables
We all know that when there are many records in the table, the query speed will be slow. After the first query is successful, it still takes so much time to re-Sort it for the second time. For this reason, when we design a database, we usually place such a large table object in an independent tablespace to
In web applications, a large amount of Javascript is applied, so code execution efficiency becomes particularly important, that is, performance! To improve JS performance, we should master some basic performance optimization methods and make them the habit of writing code. The following describes several ways to optimi
I would like to share several methods to improve MYSQL performance, which are not comprehensive enough. I hope you can add them! Please make a picture of the error!
1. database/table sharding
Obviously, the unlimited growth of a primary table (that is, a very important table, such as a user table) will inevitably seriously affect performance. Database sharding an
Use libevent and libev to improve network application performance
Use libevent and libev to improve network application performance
Manage multiple UNIX Network ConnectionsMartin C. Brown, writer, FreelanceMartin Brown has been a professional writer for more than eight years. He is the author of a wide range of boo
can be seen that 10-20 database queries and formatting may be required to display the content of the home page. This process is repeated every day for hundreds or even thousands of pages, so the queries executed by your servers and applications are much more than the ones required to display the page content.
By using memcached, you can store the formatted Information loaded from the database as a format that can be directly used on Web pages. In addition, because the information is loaded fro
more available cache, it is likely to improve the performance of applications with multiple users.
How can I disable memcached?
Although memcached is simple, memcached instances are still incorrectly used.
Memcached is not a database
The most common misuse of memcached is to use it as a data storage instead of a cache. The primary purpose of memcached is to speed up data response time. Otherwise, it
After months of research and development, the open source multi-model database Arangodb finally released its 3.2 full version, which eliminates two major hurdles, adds a long-awaited feature, and integrates an interesting feature. In addition, the official team said the new version increased the performance of Arangodb by an average of 35%. Also, the memory footprint is reduced compared to version 3.1. There have also been significant improvements in
the order amount of each customer are collected again according to the combined history and the aggregated data of the current period.3. Call the Set calculation script in the collection report, edit the report expression to complete the report productionThrough the above process can be clearly seen, the set of the report can be a good solution for the past period (+ when) data query often have a low performance
. This will produce a large number of statements, and the efficiency will certainly be low.
The solution is to execute SQL statements directly, and write an extension method on your own. although many people disagree with this method. but I personally prefer to write an extension method myself. in this way, there are two benefits. first, it is easy for developers to use. second, convenient management. some netizens have suggested using ObjectStateManager. changeObjectState is used for batch dele
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