从补丁 198 开始，Amazon Redshift 将不再支持创建新的 Python UDF。现有的 Python UDF 将继续正常运行至 2026 年 6 月 30 日。有关更多信息，请参阅[博客文章](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/)。

# STV\$1WLM\$1SERVICE\$1CLASS\$1CONFIG
<a name="r_STV_WLM_SERVICE_CLASS_CONFIG"></a>

记录 WLM 的服务类配置。

STV\$1WLM\$1SERVICE\$1CLASS\$1CONFIG 仅对超级用户可见。有关更多信息，请参阅 [系统表和视图中的数据可见性](cm_chap_system-tables.md#c_visibility-of-data)。

## 表列
<a name="r_STV_WLM_SERVICE_CLASS_CONFIG-table-columns2"></a>

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/zh_cn/redshift/latest/dg/r_STV_WLM_SERVICE_CLASS_CONFIG.html)

## 示例查询
<a name="r_STV_WLM_SERVICE_CLASS_CONFIG-sample-query2"></a>

第一个用户定义的服务类为服务类 6（名为 Service class \$11）。以下查询显示 4 以上的服务类的当前配置。有关服务类 ID 的列表，请参阅 [WLM 服务类 ID](cm-c-wlm-system-tables-and-views.md#wlm-service-class-ids)。

```
select rtrim(name) as name, 
num_query_tasks as slots, 
query_working_mem as mem, 
max_execution_time as max_time, 
user_group_wild_card as user_wildcard, 
query_group_wild_card as query_wildcard
from stv_wlm_service_class_config
where service_class > 4;

name                         | slots | mem | max_time | user_wildcard | query_wildcard
-----------------------------+-------+-----+----------+---------------+---------------
Service class for super user |     1 | 535 |        0 | false         | false   
Queue 1                      |     5 | 125 |        0 | false         | false         
Queue 2                      |     5 | 125 |        0 | false         | false         
Queue 3                      |     5 | 125 |        0 | false         | false         
Queue 4                      |     5 | 627 |        0 | false         | false         
Queue 5                      |     5 | 125 |        0 | true          | true          
Default queue                |     5 | 125 |        0 | false         | false
```

以下查询显示动态 WLM 转换的状态。转换过程中，`num_query_tasks` 和 `target_query_working_mem` 会进行更新，直至等于目标值。有关更多信息，请参阅 [WLM 动态和静态配置属性](cm-c-wlm-dynamic-properties.md)。

```
select rtrim(name) as name, 
num_query_tasks as slots, 
target_num_query_tasks as target_slots, 
query_working_mem as memory, 
target_query_working_mem as target_memory
from stv_wlm_service_class_config
where num_query_tasks > target_num_query_tasks
or query_working_mem > target_query_working_mem
and service_class > 5;

 name             | slots | target_slots | memory | target_mem 
------------------+-------+--------------+--------+------------
 Queue 3          |     5 |           15 |    125 |       375 
 Queue 5          |    10 |            5 |    250 |       125 
 (2 rows)
```