这是我第一个使用 spring-data-redis 的应用程序,我认为我很好地理解了这些概念(过去我曾多次使用 JdbcTemplate 和 RDBMS-es)。这就是正在发生的事情......
我遇到的问题是,每次我执行 get(key) 操作(使用 ValueOperations 对象)时,都会打开和关闭一个连接,这会导致大约 1/10 秒的延迟(这是服务器代码,所以是 1/10第二是实质性的)。这是spring XML配置:
<!-- Redis DAO stuff -->
<bean
id="jedisPoolConfig"
class="redis.clients.jedis.JedisPoolConfig"
p:testOnBorrow="true"
p:testOnReturn="true"
p:timeBetweenEvictionRunsMillis="60000"
p:minIdle="2"
p:maxTotal="30"
p:maxIdle="10"
/>
<bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="${redis.url}"
p:port="${redis.port}"
p:database="0"
p:use-pool="true"
p:pool-config-ref="jedisPoolConfig"
/>
<bean id="stringRedisSerializer"
class="org.springframework.data.redis.serializer.StringRedisSerializer"
/>
<bean id="redisTemplate"
class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="jedisConnectionFactory"
p:defaultSerializer-ref="stringRedisSerializer"
/>
这是相关的Java代码:
@Autowired
private RedisTemplate<String, String> template;
private ValueOperations<String, String> valOps;
@PostConstruct
public void init() {
logger.debug("111111111111111111111111aaaaaaaaaaaaaaaaaaaaaaa");
valOps = template.opsForValue();
}
public String getTestVal() {
logger.debug("getTestVal() function called++++++++++++++++++++");
Object testVal2 = valOps.get("akey");
testVal2 = valOps.get("akey");
testVal2 = valOps.get("akey");
testVal2 = valOps.get("akey");
testVal2 = valOps.get("akey");
testVal2 = valOps.get("akey");
logger.debug("TestVal2 returned from REdis: " + testVal2);
return null;
}
因此,同一键的值被检索了六次。我看到的日志输出如下:
13:46:37.011 [http-nio-8080-exec-1] DEBUG com.arrow.pricing.dao.RedisDAO - getTestVal() function called++++++++++++++++++++
13:46:37.014 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:37.344 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:37.416 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:37.543 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:37.616 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:37.742 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:37.812 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:37.940 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:38.003 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:38.128 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:38.201 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Opening RedisConnection
13:46:38.337 [http-nio-8080-exec-1] DEBUG o.s.d.r.core.RedisConnectionUtils - Closing Redis Connection
13:46:38.414 [http-nio-8080-exec-1] DEBUG com.arrow.pricing.dao.RedisDAO - TestVal2 returned from REdis: yo mama
我以为我已经遵循了有关如何设置连接池的文档,但是在处理诸如 Redis 之类的面向性能的平台时,我没想到会出现这种延迟。
提前感谢您的任何帮助或提示。