is similar to set. The difference is that set is not automatically ordered, while sorted set can sort members by providing an additional priority (score) parameter, it is insert-ordered, that is, automatic sorting. When you need an ordered and non-repeated list of sets, you can choose sorted set data structure. For example, Twitter's public timeline can be stored as score by posting time, in this way, the query is automatically sorted by time.
Implementation Method: In
Performance-related data indicators
Access the redis server through the redis-cli interface, and then use the info command to obtain all information related to the redis service. This information is used to analyze some performance indicators mentioned later in the article.
Redis performance problems and Redis performance problems
Redis may cause performance problems and provide corresponding solutions.
1. Blocking of snapshot writing
Solution:
2. AOF Problems
Solution:
3. Memory bottle
Read the catalogue:
Performance-related data metrics
Memory Utilization Used_memory
Total command Processing total_commands_processed
Delay Time
Memory Fragmentation Rate
Recycle key
Summarize
Performance-related data metricsAccess to the Redis server through the REDIS-CLI command
Before this function is not concerned, the Memcache data storage method has been used, but since the replacement of Redis, for a hash of data storage and access for Memcache is very convenient, but the problem is, a hash of the list if the amount is not large, With the Hgetall function almost no problem, once the list is more than 50 or more, at this time with the Hgetall function can be very intuitive to see perf
single node to be used. You can also do the finest granularity, and then use Redis to lock, which reduces the likelihood of thread blocking. Summarize: Either use blocking to schedule the thread, You can either implement a reactor pattern that is similar to NIO in a distributed environment to dispatch. Ensure first-in, first-out, even if some slow state, not first come to the contrary, causing poor user experience. In-depth understanding of the us
Redis Performance Tuning: Save the effect of SNAPSHOT on performance, redissnapshot
Some time ago, the Development Environment reported that access to the Redis server was very slow, and each request took several seconds. 2 ~ This will happen again in three days.
I checked the Linux
Redis Foundation, advanced features and performance tuning
Kelgon attention 2017.02.28 16:22 words 12597 read 16333 comments 5 like 154 appreciate 2
This paper will start from the basic characteristics of redis, through the description of the REDIS data structure and the main command of the
Some time ago, the Development Environment reported that access to the redis server was very slow, and each request took several seconds. 2 ~ This will happen again in three days.
I checked the Linux performance and there is no problem. Pass
# Redis-cli -- latency
It is found that accessing redis is really slow. It tak
First of all, I use the situation:
The first used memcache, a server-side cache of key-value pairs, used to store some commonly used data that is not very large, but that requires rapid response
Then, in another place, Redis is used, and then the next Redis is studied. A look, shows that they installed the PHP extension, because there is a server on the Redis s
Tags: Zabbix monitoringZabbix Monitoring Redishttp://www.21yunwei.com/archives/4195Zabbix monitoring MySQL Performancehttp://www.ttlsa.com/zabbix/zabbix-monitor-mysql/Zabbix monitoring MySQL loading stateHttp://www.linuxidc.com/Linux/2016-04/130436.htmZabbix Monitoring PHP-FPM Performance statushttp://www.ttlsa.com/zabbix/zabbix-monitor-php-fpm-status/This article is from "YHT's operations Notes" blog, please make sure to keep this source http://yht19
Redis's performance fantasies and brutal realities2011, the choice of Redis as the primary memory data storage, the main attraction to me is that it provides a variety of basic data structure can be very convenient to achieve business needs. On the other hand, it is more concerned about whether its performance is sufficient to support, after all,
2011, the choice of Redis as the primary memory data storage, the main attraction to me is that it provides a variety of basic data structure can be very convenient to achieve business needs. On the other hand, it is more concerned about whether its performance is sufficient to support, after all, Redis is a relatively new open source products. But the
Cluster technology is an important means of building high-performance Web site architecture, Imagine that the site under high concurrency access pressure, but also need to query from the massive data to meet the conditions of the data, and rapid response, we must think of the data is sliced, the data according to some rules into a number of different server nodes, To reduce the pressure on a single-node server.In the previous article we talked about R
Redis performance test
Redis performance testing is achieved by executing multiple commands at the same time. Redis performance testing is mainly implemented through redis-benchmark in
as follows:
1) create a redisContext
2) run the command through redisContext
3) obtain the required data from the returned redisReply.
The Code is as follows:
redisContext * c = redisConnect((char *)"192.168.150.135",6379); const char * pData = "this is a test";
redisReply *reply1 = (redisReply *)redisCommand(c,"SET 100 %s",pData);
freeReplyObject(reply1);
redisReply *reply2 = (redisReply *)redisCommand(c,"GET 100");Printf ("% s \ n", reply2-> str );
FreeReplyObject (reply2 );
Is it very simp
127.0.0.1:9001:ok Connecting to Node 127.0.0.1:9002:ok Connecting to Node 127.0.0.1:9003:ok >>> sending CLUSTER forget messages to the CLUSTER ... >>> SHUTDOWN the node. Zhaoguihuadediannao:src zhaogh$./redis-cli-p 9003 Could not connect to Redis at 127.0.0.1:9003:connection refused Not connected> Very good, it ' s very good. The previous article said that the C # client is not yet well supported for
Tags: message release driver-Erlang lang data changes ordered script messageWhat is Redis Redis is a key-value storage system. Similar to memcached, it supports storing more value types, including string (string), list (linked list), set (set), Zset (sorted set-ordered collection), and hash (hash type). These data types support Push/pop, Add/remove, and intersection-set and difference sets, and richer opera
In the previous article we introduced the differences between Redis and Couchbase and show their respective strengths (please poke the blue bold font: Couchbase vs Redis, which one is better. )。 This article will provide developers with the most real and powerful data support, so that technology selection more objective, so that the cluster expansion is no longer blind, in the predictable business scale, so
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