redis delete key

Redis Server went away When viewing the system log file, it is found that the error is thrown every day: PHP Fatal Error:Uncaught exception ' redisexception ' with message ' Redis server went away ' The script that throws the problem is a statistical script, need to read the previous day data and warehousing, initially thought to be redis read too frequently caus

Delete key in bulkThere is a command DEL that removes a single key in Redis, but it seems there is no instruction to delete the key in bulk, but we can do this with the Linux xargs command. 123

Redis has deleted a single key in the command DEL, but there seems to be no bulk delete key instructions, but we can use the Linux xargs instructions to complete this action. Copy Code code as follows: REDIS-CLI Keys "*" | Xargs

way after optimization" Local keys = Redis.call (' Keys ', argv[1]) for I=1, #keys, and do Redis.call (' del ', Unpack (keys, I, Math.min (i+4999, #key s)) End return #keys"'volume:*'Comments:In fact, the second way of improvement, one-time unpack too much will be wrong, then simply once 5000, so there will be no problem!The meaning of this script is to first define an array of keys, which stores all of the pattern matching keys with ' Volume: ', and

@RunWith (springrunner.class) @SpringBootTest public class Redistest { @Autowired private Stringredistemplate stringredistemplate; @Autowired private redistemplate redistemplate; /** * Use Redis blur clear cache /@Test public void Testrediscache () { String keys= "Test:"; Redistemplate.opsforvalue (). Set (Keys+1, "This is a test content!", 1000,timeunit.seconds); String Content=redistem

Tag: Ash height mil set color data type based on key delete# -*-coding:utf-8-*- Import Redis # This redis connection is not available, please modify R =redis to suit your needs . Redis (host="123.516.174.910", port=6379,password="

The Redis key (Key) command command describes the Redis DEL command, which is used to delete key in key presence. The Redis Dump command ser

Similarly, what is a lazy Delete, a lazy, and a lazy delete operation means that I will not delete the expired keys. So when is the last resort? The client has taken the data and the key has expired. Obviously, it cannot be returned to the client. This is the time when the client is late, I can't do it without deletin

The Redis key command is used to manage Redis keys.GrammarThe basic syntax for the Redis Key command is as follows:Redis 127.0.0.1:6379> COMMAND Key_nameInstanceRedis 127.0.0.1:6379> SET w3ckey redisokredis 127.0.0.1:6379> DEL w3ckey (integer) 1 In the above instance DEL is

Key-Value Pair design in Redis and Redis key-Value Design The rich data structure makes redis design very interesting. Unlike relational databases, DEV and DBA need to communicate in depth, and review does not require DBA participation for each row of SQL statements like mem

Tags: width tor sele 5.5 start feature img CLU successOne, Redis Key Management 1 key RenameRename Oldkey newkey//formatRename Oldkey NewKey//If Oldkey exists before it is overwrittenSet name James; set name1 Mike//Data initializationRenamenx name name1//renaming fails only if NAME1 does not exist to rename2 return random keyRandomkey//Return random key3 keys Exp

Redis provides a lifetime for the key, and the lifetime is permanent when no life time is specified. Redis will automatically delete this key when the time expires. You can use the expire command, the time unit seconds, if a key i

Tags: parentheses random call type wildcard character important list Erro miningFirst, overview:The previous blogs focused on commands related to Redis data types, such as String, List, Set, hashes, and Sorted-set. These commands all have one thing in common, that is, all operations are for the value associated with the key. This blog will focus on the Redis comm

There's a thing that's been bothering me in my head, but it's not clear that it's going to hinder my progress. Do your own project demo can always use only one sheet ... So today is still learning the next foreign key hope to understand some ... Baidu on the role of the search foreign key "to maintain data integrity, consistency ", " referential integrity " ... What , I believe many small partners do not u

As an important mechanism for periodically cleaning up invalid data, primary key failures exist in most caching systems, and Redis is no exception. Of the many commands provided by Redis, EXPIRE, Expireat, Pexpire, Pexpireat, and Setex and Psetex can be used to set the expiration time of a key-value pair, and a

What is the delete deletion key in the Mac OS x system? Small series after sorting found, delete key function of a total of 5, basically are deleted. The next small series will give you a detailed description of the role of the deletion key. The first type: Press the

if not present, return 0 if present　　Hmset user:2 name Weichen age 20 # Set multiple values to the hash table at the same timeHmget user:2 name Age # Bulk Get values for multiple fields　　Hincrby User:2 Age 5 # adds 5 to the field age in the hash tableHincrbyfloat User:2 Age 0.5 # allows adding floating-point values to fields in a hash tableHexists user:2 Name # Determine if a field exists in the hash tableHlen User:2 # Returns the number of fields in the hash table　　Hdel user:2 Age # Remove a f

First, overview: This section mainly describes the Redis command related to key. Learning these commands is a very important basis for learning Redis and a useful tool to fully tap the potential of redis. The Redis key command

hashing type (hash) related Operations We can consider the hashes type in Redis as a map container with string key and string value. Therefore, this type is ideal for storing information about value objects.such as username, password, and age. If a hash contains very few fields, the data of that type will take up only a small amount of disk space. Each hash can beTo store 4,294,967,295

time another cmd window, the original do not close, otherwise you will not be able to access the server. Switch to the Redis directory to run the redis-cli.exe-h 127.0.0.1-p 6379 . Set the key-value pair set MyKey ABC Remove key value pair get MyKey C:\redis>