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

1. CREATE USER user_g RESOURCE POOL 'respool_g1' PASSWORD 'Gauss_234';

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2、创建业务用户关联到业务资源池

1. CREATE USER user_1 RESOURCE POOL 'respool_g1' USER GROUP 'user_g' PASSWORD 'Gauss_234';

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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;

1.     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
2. -----------------+-------------+--------------+----------+-----------+------------+-------------+-----------------+------------------+------------------+-------------------+-------------+--------------+-------------+--------------+------------+-------------
3. perfadm | 0 | 0 | 0 | 0 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
4. user_g1_job_2   | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
5. user_grp_2      | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
6. user_g1_job_1_2 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
7. user_2          | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
8. user_grp_1      | 0 | 5574 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
9. user_1          | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
10. user_4          | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
11. user_g1_job_1_1 | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
12. user_g2_job_1   | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
13. user_5          | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
14. user_3          | 0 | 27876 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
15. user_g2_job_2   | 0 | 1113 | 0 | 24 | 0 | -1 | 0 | -1 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0
16. (13 rows)

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历史视图为：gs_wlm_user_resource_history;

1.     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
2. -------------------+-------------------------------+-------------+--------------+----------+-----------+------------+-------------+-----------------+------------------+------------------+-------------------+-------------+--------------+-------------+--------------+------------+-------------
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. 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
15. 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
16. 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
17. 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

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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

1. nodegroup | rpname | ref_count | fast_run | fast_wait | slow_run | slow_wait
2. -----------+------------------+-----------+----------+-----------+----------+-----------
3. lc1       | respool_grp_1    | 0 | 0 | 0 | 0 | 0
4. lc1       | default_pool | 0 | 0 | 0 | 0 | 0
5. lc1       | respool_g1_job_1 | 0 | 0 | 0 | 0 | 0
6. lc1       | respool_g1_job_2 | 0 | 0 | 0 | 0 | 0
7. lc1       | respool_grp_2    | 0 | 0 | 0 | 0 | 0
8. lc1       | respool_g2_job_1 | 0 | 0 | 0 | 0 | 0
9. lc1       | respool_g2_job_2 | 0 | 0 | 0 | 0 | 0
10. lc1       | respool_1        | 0 | 0 | 0 | 0 | 0
11. lc1       | respool_2        | 0 | 0 | 0 | 0 | 0
12. lc2       | default_pool | 0 | 0 | 0 | 0 | 0
13. lc1       | respool_3        | 0 | 0 | 0 | 0 | 0
14. (11 rows)

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资源池实时资源监控视图：GS_RESPOOL_RESOURCE_INFO

1. 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
2. -----------+------------------+---------------------+-----------+----------+-----------+------------+----------+-----------+------------+----------+-----------+----------+--------------+-----------+-------------+--------------+-------------+--------------+------------+-------------
3. lc1       | respool_grp_1    | ClassG1             | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0
4. lc1       | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0
5. 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
6. 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
7. lc1       | respool_grp_2    | ClassG2             | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 5574 | 0 | 0 | 0 | 0 | 0 | 0
8. 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
9. 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
10. lc1       | respool_1        | ClassN1:wn1         | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0
11. lc1       | respool_2        | ClassN1:wn2         | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0
12. lc2       | default_pool | DefaultClass:Medium | 0 | 0 | 0 | -1 | 0 | 0 | -1 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0
13. lc1       | respool_3        | ClassN2:wn3         | 0 | 0 | 0 | -1 | 0 | 0 | 10 | 0 | 24 | 0 | 0 | 27876 | 0 | 0 | 0 | 0 | 0 | 0
14. (11 rows)

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资源池历史资源监控表：GS_RESPOOL_RESOURCE_HISTORY

1.            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
2. -------------------------------+-----------+----------------------+---------------------+-----------+----------+-----------+------------+----------+-----------+------------+----------+-----------+----------+--------------+-----------+-------------+--------------+-------------+--------------+------------+-------------
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. 2022-06-29 14:34:31.517585+08 | lc1       | respool_g2_job_1     | ClassG2:wg2_1       | 0 |

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