redis remove key

: When the expiration key is more, deleting the expired key may take up a significant amount of CPU time, in the case of memory tension but CPU time is very tense, Using CPU time on expired keys that are not related to the current task will undoubtedly have an impact on the response time and throughput of the server.For example, if a large number of command requests are waiting for the server to process, an

Now occasionally found in Redis some key value has dozens of MB, this is abnormal data, there is no way to sort by value size list more than 10MB all key? Reply content: Now occasionally found in Redis some key value has dozens of MB, this is abnormal data, there is no

Python operation Redis setting key expiration time instance code, pythonredis The Expire command is used to set the key expiration time. The key is no longer available after it expires. R. set ('2', '4028b2883d3f5a8b013d57228d760a93 ') # if the result is successful, True is returned and False is returned. The following

Jfinal can remove the primary key after saving the object, even if the primary key is the database self-growing.Today, I inadvertently found that jfinal save the object can be removed from the primary key, my database table primary keys are self-increment. Like whatBlog blog = getmodel (blog.class);//There is no ID sto

Recent research into Redis, and spring data support for Redis, has found a strange phenomenon First say the phenomenon, through the redistemplate under the Opsforhash method to store the value of the hash type, after the successful operation, to the Redis console to display the keys *, found a strange phenomenon, the inserted hash type of

Redis's Official ConfHttps://raw.github.com/antirez/redis/2.2/redis.confThe specific way in which the expiration policy is in 6.The default expiration policy in Redis is VOLATILE-LRU. Setup modeConfig set Maxmemory-policy Volatile-lruMaxmemory-policy six different ways VOLATILE-LRU: LRU (default) only for keys that have an expiration time set ALLKEYS-LRU: Delete the LRU algorithm

;>>>>>>>119 - //View the data type of a key121 //because the MM key does not exist in the database, the command returns none122String type = Jedis.type ("MM");123System.out.println (type);//None124 theString type2 = Jedis.type ("MyKey");126System.out.println ("type2=" +type2);//type2= String127 - //prepares a value that is a key of the set type129Jedis.sadd

1, the role of this function: To remove the duplicate elements in the array and key name sorting function Assoc_unique ($arr, $key) { $tmp _arr = Array (); foreach ($arr as $k => $v) { if (In_array ($v [$key], $tmp _arr)) { Unset ($arr [$k]); } else { $tmp _arr[] = $v [$key]

. Although it may cause performance degradation, it is recommended to enable it. The same is true for qualify references to functions. There is a button to enter the doc types page (Options menu can also be entered), which has many important options: In Editing options, Expand tabs, visible tabs can help us discover and convert tabs.Show right margint and margin width can remind us whether to write a row too long.We recommend that you disable the symbol Window option (because there is a shortcut

Many users will use a key ghost hard disk version to the system backup maintenance operations, when a key ghost hard disk version of the version up, Win8.1 boot will appear first select the interface of the operating system, generally takes 5 seconds to enter the default to win8.1 system download, although no impact on the system, but some users asked, how to remove