pg_proctab
通过SQL接口访问操作系统进程表
概览
| 扩展包名 | 版本 | 分类 | 许可证 | 语言 |
|---|---|---|---|---|
pgnodemx | 1.7 | STAT | BSD 3-Clause | C |
| ID | 扩展名 | Bin | Lib | Load | Create | Trust | Reloc | 模式 |
|---|---|---|---|---|---|---|---|---|
| 6440 | pgnodemx | 否 | 是 | 是 | 是 | 否 | 是 | - |
| 6450 | pg_proctab | 否 | 是 | 否 | 是 | 否 | 是 | - |
| 相关扩展 | prioritize system_stats pg_background pg_wait_sampling pgmeminfo pgsentinel pg_profile |
|---|
from pgnodemx
版本
| 类型 | 仓库 | 版本 | PG 大版本 | 包名 | 依赖 |
|---|---|---|---|---|---|
| EXT | PIGSTY | 1.7 | 1817161514 | pgnodemx | - |
| RPM | PIGSTY | 1.7 | 1817161514 | pgnodemx_$v | - |
| DEB | PIGSTY | 1.7 | 1817161514 | postgresql-$v-pgnodemx | - |
| OS / PG | PG18 | PG17 | PG16 | PG15 | PG14 |
|---|---|---|---|---|---|
| el8.x86_64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| el8.aarch64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| el9.x86_64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| el9.aarch64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| el10.x86_64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| el10.aarch64 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 | PIGSTY 1.7 |
| d12.x86_64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| d12.aarch64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| d13.x86_64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| d13.aarch64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| u22.x86_64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| u22.aarch64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| u24.x86_64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
| u24.aarch64 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 | PGDG 2.0.1 |
构建
您可以使用 pig build 命令构建 pgnodemx 扩展的 RPM / DEB 包：
pig build pkg pgnodemx # 构建 RPM / DEB 包
安装
您可以直接安装 pgnodemx 扩展包的预置二进制包，首先确保 PGDG 和 PIGSTY 仓库已经添加并启用：
pig repo add pgsql -u # 添加仓库并更新缓存
使用 pig 或者是 apt/yum/dnf 安装扩展：
pig install pgnodemx; # 当前活跃 PG 版本安装
pig ext install -y pgnodemx -v 18 # PG 18
pig ext install -y pgnodemx -v 17 # PG 17
pig ext install -y pgnodemx -v 16 # PG 16
pig ext install -y pgnodemx -v 15 # PG 15
pig ext install -y pgnodemx -v 14 # PG 14
dnf install -y pgnodemx_18 # PG 18
dnf install -y pgnodemx_17 # PG 17
dnf install -y pgnodemx_16 # PG 16
dnf install -y pgnodemx_15 # PG 15
dnf install -y pgnodemx_14 # PG 14
apt install -y postgresql-18-pgnodemx # PG 18
apt install -y postgresql-17-pgnodemx # PG 17
apt install -y postgresql-16-pgnodemx # PG 16
apt install -y postgresql-15-pgnodemx # PG 15
apt install -y postgresql-14-pgnodemx # PG 14
创建扩展：
CREATE EXTENSION pg_proctab;
用法
pg_proctab 允许在 PostgreSQL 内部通过 SQL 函数查询操作系统的进程、CPU、内存、磁盘和负载统计信息。
函数
进程信息 (pg_proctab())：
-- 所有 PostgreSQL 进程信息
SELECT pid, comm, state, utime, stime, vsize, rss, reads, writes
FROM pg_proctab();
-- 与 pg_stat_activity 关联获取每个查询的资源使用情况
SELECT a.pid, a.query, p.utime, p.stime, p.vsize, p.rss
FROM pg_stat_activity a
JOIN pg_proctab() p ON a.pid = p.pid;
返回每个进程的信息：pid、comm、fullcomm、state、ppid、utime、stime、priority、nice、num_threads、vsize、rss、processor、uid、username、rchar、wchar、reads、writes 等。
CPU 时间 (pg_cputime())：
SELECT "user", nice, system, idle, iowait FROM pg_cputime();
负载均值 (pg_loadavg())：
SELECT load1, load5, load15, last_pid FROM pg_loadavg();
内存使用 (pg_memusage())：
SELECT memused, memfree, memshared, membuffers, memcached,
swapused, swapfree, swapcached
FROM pg_memusage();
磁盘使用 (pg_diskusage())：
SELECT devname, reads_completed, writes_completed,
sectors_read, sectors_written
FROM pg_diskusage();