Postgis pg_stat_statements错误

Question

我有一个Postgis数据库部署在Kubernetes集群上，使用this镜像：docker pull postgis/postgis:13-3.1。

我试图解决这个错误：

2021-06-29 03:20:50.958 UTC [2852] ERROR:  relation "pg_stat_statements" does not exist at character 536
2021-06-29 03:20:50.958 UTC [2852] STATEMENT:  SELECT t2.rolname, t3.datname, queryid, calls, total_time / 1000 as total_time_seconds, min_time / 1000 as min_time_seconds, max_time / 1000 as max_time_seconds, mean_time / 1000 as mean_time_seconds, stddev_time / 1000 as stddev_time_seconds, rows, shared_blks_hit, shared_blks_read, shared_blks_dirtied, shared_blks_written, local_blks_hit, local_blks_read, local_blks_dirtied, local_blks_written, temp_blks_read, temp_blks_written, blk_read_time / 1000 as blk_read_time_seconds, blk_write_time / 1000 as blk_write_time_seconds FROM pg_stat_statements t1 JOIN pg_roles t2 ON (t1.userid=t2.oid) JOIN pg_database t3 ON (t1.dbid=t3.oid) WHERE t2.rolname != 'rdsadmin'

所以我在我所有的dbs中安装了缺少的扩展，如下所示：

psql -U $PG_USER \
  -d $DATABSE \
  -c "CREATE EXTENSION pg_stat_statements SCHEMA public"

psql -U $PG_USER \
  -d $DATABSE \
  -c "CREATE EXTENSION pg_stat_statements SCHEMA pg_catalog"

我现在得到了这个错误：

2021-06-29 20:04:46.870 UTC [331] ERROR:  column "total_time" does not exist at character 48
2021-06-29 20:04:46.870 UTC [331] STATEMENT:  SELECT t2.rolname, t3.datname, queryid, calls, total_time / 1000 as total_time_seconds, min_time / 1000 as min_time_seconds, max_time / 1000 as max_time_seconds, mean_time / 1000 as mean_time_seconds, stddev_time / 1000 as stddev_time_seconds, rows, shared_blks_hit, shared_blks_read, shared_blks_dirtied, shared_blks_written, local_blks_hit, local_blks_read, local_blks_dirtied, local_blks_written, temp_blks_read, temp_blks_written, blk_read_time / 1000 as blk_read_time_seconds, blk_write_time / 1000 as blk_write_time_seconds FROM pg_stat_statements t1 JOIN pg_roles t2 ON (t1.userid=t2.oid) JOIN pg_database t3 ON (t1.dbid=t3.oid) WHERE t2.rolname != 'rdsadmin'

我试着找出原因，但在任何地方都没有找到任何有用的东西。对如何解决这个问题有什么想法吗？

Postgres版本：psql (PostgreSQL) 13.2 (Debian 13.2-1.pgdg100+1)

配置文件：

# ...
shared_preload_libraries = 'pg_stat_statements'
pg_stat_statements.max = 1000
pg_stat_statements.track = all
# ...

Answer 1

在jjanes注释之后，我发现Prometheus节点导出器进行了一个不正确的查询(here)，这是因为该列确实拼写错误。

更改列名解决了此问题。

Answer 2

该查询来自某个监控工具；据我所知，该工具与postgis无关。监控工具已经过时了，因为现在该列被称为"total_exec_time“。(在为计划时间和执行时间添加列时对其进行了重命名。)