详解GaussDB(DWS) 资源监控
摘要：本文主要着重介绍资源池资源监控以及用户资源监控。
本文分享自华为云社区《GaussDB(DWS)资源监控之用户、队列资源监控》，作者： 一只菜菜鸟。
GaussDB(DWS)资源监控功能包含实例资源监控、内存资源监控、资源池资源监控、查询监控以及用户资源监控，本文主要着重介绍资源池资源监控以及用户资源监控；
多租户
用户是使用数据库系统以及执行业务的主要手段，在GaussDB(DWS)中将用户场景分为两种方案，分别是普通方案以及多租户方案；为了更好的使用GaussDB(DWS)的资源分组管理，建议依托多租户场景构造具体的使用情况；
多租户引入了两级用户机制，分别为组用户以及业务用户；两级用户分别关联不同的资源池以及存储空间；
示例
1、创建组用户关联到组资源池
CREATE USER user_g RESOURCE POOL 'respool_g1' PASSWORD 'Gauss_234';
2、创建业务用户关联到业务资源池
CREATE USER user_1 RESOURCE POOL 'respool_g1' USER GROUP 'user_g' PASSWORD 'Gauss_234';
注：创建业务用户时，业务资源池（resource pool）和组用户（user group）为必选字段；
用户资源监控
用户资源监控中记录所有用户使用资源（内存、CPU核数、存储空间、临时空间、算子落盘以及IO）的实时使用情况，也可以通过查询历史表访问用户资源的历史使用情况；
相关GUC参数：
相关视图/表：
实时视图为：pg_total_user_resource_info;
username | used_memory | total_memory | used_cpu | total_cpu | used_space | total_space | used_temp_space | total_temp_space | used_spill_space | total_spill_space | read_kbytes | write_kbytes | read_counts | write_counts | read_speed | write_speed -----------------+-------------+--------------+----------+-----------+------------+-------------+-----------------+------------------+------------------+-------------------+-------------+--------------+-------------+--------------+------------+------------- perfadm | 0 | 0 | 0 | 0 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_2 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_grp_2 | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_1_2 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_2 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_grp_1 | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_1 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_4 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_1_1 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g2_job_1 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_5 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_3 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g2_job_2 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 (13 rows)
历史视图为：gs_wlm_user_resource_history;
username | timestamp | used_memory | total_memory | used_cpu | total_cpu | used_space | total_space | used_temp_space | total_temp_space | used_spill_space | total_spill_space | read_kbytes | write_kbytes | read_counts | write_counts | read_speed | write_speed -------------------+-------------------------------+-------------+--------------+----------+-----------+------------+-------------+-----------------+------------------+------------------+-------------------+-------------+--------------+-------------+--------------+------------+------------- perfadm | 2022-06-29 14:26:32.063948+08 | 0 | 0 | 0 | 0 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_3 | 2022-06-29 14:26:32.063948+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_5 | 2022-06-29 14:26:32.063948+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g2_job_1 | 2022-06-29 14:26:32.063948+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_1_1 | 2022-06-29 14:26:32.063948+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_4 | 2022-06-29 14:26:32.063948+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_1 | 2022-06-29 14:26:32.063948+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_grp_1 | 2022-06-29 14:26:32.063948+08 | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_2 | 2022-06-29 14:26:32.063948+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_1_2 | 2022-06-29 14:26:32.063948+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_grp_2 | 2022-06-29 14:26:32.063948+08 | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g2_job_2 | 2022-06-29 14:26:32.063948+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g1_job_2 | 2022-06-29 14:26:32.063948+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_1 | 2022-06-29 14:26:01.987779+08 | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 user_g2_job_2 | 2022-06-29 14:26:01.987779+08 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
资源池资源监控
多租户场景下，用户关联资源池执行业务，其消耗的资源汇总到其对应的资源池上，可以通过资源池资源监控视图，实时查看其相应数值，以及历史表记录的资源历史使用情况；
相关GUC参数
同用户资源监控相关GUC参数。
相关视图/表
资源池实时信息监控视图：GS_RESPOOL_RUNTIME_INFO
nodegroup | rpname | ref_count | fast_run | fast_wait | slow_run | slow_wait -----------+------------------+-----------+----------+-----------+----------+----------- lc1 | respool_grp_1 | 0 | 0 | 0 | 0 | 0 lc1 | default_pool | 0 | 0 | 0 | 0 | 0 lc1 | respool_g1_job_1 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g1_job_2 | 0 | 0 | 0 | 0 | 0 lc1 | respool_grp_2 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g2_job_1 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g2_job_2 | 0 | 0 | 0 | 0 | 0 lc1 | respool_1 | 0 | 0 | 0 | 0 | 0 lc1 | respool_2 | 0 | 0 | 0 | 0 | 0 lc2 | default_pool | 0 | 0 | 0 | 0 | 0 lc1 | respool_3 | 0 | 0 | 0 | 0 | 0 (11 rows)
资源池实时资源监控视图：GS_RESPOOL_RESOURCE_INFO
nodegroup | rpname | cgroup | ref_count | fast_run | fast_wait | fast_limit | slow_run | slow_wait | slow_limit | used_cpu | cpu_limit | used_mem | estimate_mem | mem_limit | read_kbytes | write_kbytes | read_counts | write_counts | read_speed | write_speed -----------+------------------+---------------------+-----------+----------+-----------+------------+----------+-----------+------------+----------+-----------+----------+--------------+-----------+-------------+--------------+-------------+--------------+------------+------------- lc1 | respool_grp_1 | ClassG1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g1_job_1 | ClassG1:wg1_1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g1_job_2 | ClassG1:wg1_2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_grp_2 | ClassG2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g2_job_1 | ClassG2:wg2_1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_g2_job_2 | ClassG2:wg2_2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_1 | ClassN1:wn1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_2 | ClassN1:wn2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 lc2 | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 lc1 | respool_3 | ClassN2:wn3 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 (11 rows)
资源池历史资源监控表：GS_RESPOOL_RESOURCE_HISTORY
timestamp | nodegroup | rpname | cgroup | ref_count | fast_run | fast_wait | fast_limit | slow_run | slow_wait | slow_limit | used_cpu | cpu_limit | used_mem | estimate_mem | mem_limit | read_kbytes | write_kbytes | read_counts | write_counts | read_speed | write_speed -------------------------------+-----------+----------------------+---------------------+-----------+----------+-----------+------------+----------+-----------+------------+----------+-----------+----------+--------------+-----------+-------------+--------------+-------------+--------------+------------+------------- 2022-06-29 14:35:02.262234+08 | lc1 | respool_grp_1 | ClassG1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_3 | ClassN2:wn3 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc2 | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_2 | ClassN1:wn2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_1 | ClassN1:wn1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_g2_job_2 | ClassG2:wg2_2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_g2_job_1 | ClassG2:wg2_1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_grp_2 | ClassG2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_g1_job_2 | ClassG1:wg1_2 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | respool_g1_job_1 | ClassG1:wg1_1 | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 1113 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:35:02.262234+08 | lc1 | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0 2022-06-29 14:34:31.517585+08 | lc1 | respool_g2_job_1 | ClassG2:wg2_1 | 0 |
