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Key长度对Redis性能的影响
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package com.atbug.test; | |
import redis.clients.jedis.Jedis; | |
import java.util.Random; | |
/** | |
* Created by addo on 2017/3/16. | |
*/ | |
public class RedisTest { | |
private static String[] keys = new String[1000]; | |
private static String randomString(int length) { | |
Random random = new Random(); | |
char[] chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray(); | |
StringBuilder key = new StringBuilder(length); | |
int i = length; | |
while (i > 0) { | |
key.append(chars[random.nextInt(chars.length)]); | |
i--; | |
} | |
return key.toString(); | |
} | |
private static void write(Jedis jedis, int length) { | |
long start = System.currentTimeMillis(); | |
String key = null; | |
String value = null; | |
for (int i = 0; i < 1000; i++) { | |
key = randomString(length); | |
keys[i] = key; | |
value = randomString(1000); | |
jedis.set(key, value); | |
} | |
System.out.println(String.format("put key length %d with value length 1000 in 1000 tims costs: %d ms", length, System.currentTimeMillis() - start)); | |
} | |
private static void read(Jedis jedis, int length) { | |
long start = System.currentTimeMillis(); | |
for (int i = 0; i < keys.length; i++) { | |
jedis.get(keys[i]); | |
} | |
System.out.println(String.format("get key length %d with value length 1000 in 1000 tims costs: %d ms", length, System.currentTimeMillis() - start)); | |
} | |
public static void main(String[] args) throws InterruptedException { | |
Jedis jedis = new Jedis("localhost", 6379); | |
int[] lengths = {10, 100, 500, 1000, 2500, 5000, 7500, 10000, 20000}; | |
for (int i = 0; i < lengths.length; i++) { | |
write(jedis, lengths[i]); | |
read(jedis, lengths[i]); | |
keys = new String[1000]; | |
jedis.flushAll(); | |
} | |
System.out.println(); | |
} | |
} |
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