下面是Coordinator特有的参数 max_pool_size和min_pool_size 像连接池一样,Coordinator维护着Coordinator到Datanodes的连接。因为每个事务都可能被所有的Datanode参与,这个参数应该至少设置为当前Coordinator的max_connections*集群中Datanode的值。min_pool_size设置Coordinator到远程节点的最小值,缺省值为1。 max_coordinators...
<property name="maxPoolSize">100</property> <!--最小连接数--> <property name="minPoolSize">10</property> </default-config> </c3p0-config> ``` ### 测试连接 ```java // 创建 ComboPooledDataSource 对象,该对象间接实现了 java 官方提供的 DataSource 接口 ComboPooledDataSource dataSource ...
1. max_connections = 1024 2. shared_buffers = 2048MB # shared_buffer没有必要设置过大 3. checkpoint_segments = 64 4. checkpoint_timeout = 20min # 让checkpoint间隔尽量大 5. logging_collector = on 6. autovacuum = off 7. min_pool_size = 100 # 连接池初始大小 8. max_pool_size = 1024...
The default value of max-thread-pool-size is 200. If it is set to a low value, you might see only those number of active connections to postgres. Alternatively, you could set the max-pool-size and steady-pool-size to the same value say 10 and print the physical connection toString in...
Please check if all nodes are running fine and also review max_connections and max_pool_size configuration parameters 分析过程 检查了网络、防火墙、max_connections、max_pool_size均没有问题。无意中发现data node的参数文件中gtm_host设置为rt67-1,好像哪里不对。于是在官网上查询对该参数的定义。
private int minPoolSize; private int maxPoolSize; private int maxLifetime; private int borrowConnectionTimeout; private int loginTimeout; private int maintenanceInterval; private int maxIdleTime; private String testQuery; } 1. 2. 3. 4. ...
Please check if all nodes are running fine and also review max_connections and max_pool_size configuration parameters STATEMENT: create table test1(id integer,name varchar(20)); 原因:这个是由于某些环境或配置出了问题,我的就是pg_hba.conf配置出了问题,Ipv4要改成 0:0:0:0/0 trust才行。 但这...
20.04 LTS数据库版本PostgreSQL 13.2MySQL 8.0.23max_connections200200shared_buffers / innodb_buffer_pool_size8GB8GBeffective_cache_size24GBN/Amaintenance_work_mem / innodb_log_file_size2GB1GBcheckpoint_completion_target / innodb_flush_log_at_trx_commit0.91query_cache_size (Deprecated in MySQL 8.0)N/...
The connection pool has been exhausted, either raise MaxPoolSize (currently 100) or Timeout (currently 15 seconds) A simple fix was to add theusingkeyword: using var con = Hangfire.JobStorage.Current.GetConnection(); Sign up for freeto join this conversation on GitHub....
对于数据库最重要的就是如何将数以亿计的数据从磁盘加载到内存中,让计算变得可能,并且尽可能的快, postgresql 与其他的数据库不同在于,它对数据的依赖不在与磁盘,而在于LINUX 的cache,每次的数据提取都是从linux的file cache中获得的。而数据库中大部分的努力都是想让处理的数据尽量留在内存中,并且时间足够长,同...