suppose we have a sql query that will take 2 seconds. We cache the results of this sql query to redis and set a 60-second timeout. so when 60 seconds arrive, that is, two seconds from 60 to 62 seconds, hundreds of requests may miss the cache and query ...
as we all know, Redis can be well used in data caching scenarios, which can greatly improve the read and write efficiency compared to MySQL. however, I have found that many of the application scenarios advertised by Redis enthusiasts actually do not ex...
Baidu found this way of thinking: needs a queue, a queue of panic buying results and a queue of inventory. In the case of high concurrency, first put the user into the queue, use a thread loop to remove a user from the queue, and judge whether the user...
assume that concurrency is very high, with 1 million keys being put into redis, at the same time per second and with the same expiration time so redis cleans up 1 million keys at the same time, without blocking? ...
ask a question: 1-100 servers, each service maintains a globalredis pool; (is connected to a redis) will there be too many global redis connections? there is no maintenance pool, so turn it off after using it . the local redis is maintained by a ...
I am a win7 system and successfully installed redis,. Now I have configured in the configuration file. save 900 1 save 300 10 save 60 10000 rdb persistence is supposed to be enabled, but after set and get operations, the file has not been up...
because of the need for sso single sign-on, different servers and the same domain name, the user center plans to develop with laravel, in which session is shared in redis. How to obtain session in laravel projects for other projects. Ask for guidance. ...
recently I saw an article https: codeshelper.com a 11. with two sentences like this: lpush+rpop=Queue() lpush+brpop=Message Queue suddenly don t understand the similarities and differences between redis queues and redis message queues? What scenari...
how does the user code perceive which instance of the current master is after the master-slave switch of the redis sentinel cluster? Thus write to the current main library. Thank you for your guidance ~ ...
< H1 > 1. Problem description < H1 > No error is reported when the command line runs, and: redis server went away error occurs in the form of browser access server script < H1 > Test Code: < H1 > : < H1 > problem speculation < H1 > 1.php-redi...
has encountered a difficult problem recently. I use redis for message queuing. Each queue contains a task id, the simple process is as follows: 1. Read id, consumption from list 2. Read the details of this task from the database according to id,...
redis server, with only one node. I am inserting a piece of data, . set 1 1 . get 1 . save dumps.rdb Desktop . del 1 . get 1 nil . redis 7. dumps.rdb var lib redis 8. redis 9. get 1 nil data backup is not restored. I would like to ask what is th...
use mybatis to configure custom secondary cache. Using xml annotation can use < cache type= "com.test.dao.MybatisRedisCache " > to successfully use custom cache, but using @ CacheNamespace (implementation = MybatisRedisCache.class) on the dao i...
how do you tp5 encapsulate the extension function of redis? Because there are only simple functions of set and get by default, guide me. ...
after you have climbed with scrapy-redis spiders, you will not be able to climb again. If you change the name of the spider, you can crawl again, and if you change back to the original name, you will start the deduplication mechanism again. Although you...
how to invalidate the QR code generated by Alipay SDK? is not a request for some interface of Alipay, this QR code payment link will be invalid? ...
I have two videos to play at the same time (safari ios). And if they both have audio, they can t play at the same time. not ok when I play video1 (unmuted) then play video2 (unmuted), mobile safari (ios) stops video1 then plays video2. ok when ...
JAVA_HOME= Library Java JavaVirtualMachines jdk1.8.0_161.jdk Contents Home PATH=$JAVA_HOME bin:$PATH:. CLASSPATH=$JAVA_HOME lib tools.jar:$JAVA_HOME lib dt.jar:. export M2_HOME= " Applications apache-maven-3.5.3 " export PATH= "$M2_HOME bin:$PATH " ex...
when the framework uses antd and uses Input components, I need to display multiple languages in the placeholder property the code is as follows: <Search placeholder={<FormattedMessage id="S_T" >} enterButton="Search&qu...
such as the title. I created and edited a project in HBuilder, and then renamed the project in the HBuilderProjects folder. Then when I opened HBuilder and wanted to continue editing the project, I couldn t open it. ...