commit 69b42ff74f6b806d13556cca1b8cb7d1bbd3c9c4
Author: Jonas Braus <brausjonas@icloud.com>
Date:   Sat Jan 17 01:25:57 2026 +0100

    initial

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..13c456b
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,3 @@
+[target.'cfg(target_os="macos")']
+# Postgres symbols won't be available until runtime
+rustflags = ["-Clink-arg=-Wl,-undefined,dynamic_lookup"]
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..abf56f2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+.DS_Store
+.idea/
+/target
+*.iml
+**/*.rs.bk
+Cargo.lock
+tests/pg_regress/results
+tests/pg_regress/regression.diffs
+tests/pg_regress/regression.out
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..055209f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,38 @@
+[package]
+name = "pgerr"
+version = "0.0.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[[bin]]
+name = "pgrx_embed_pgerr"
+path = "./src/bin/pgrx_embed.rs"
+
+[features]
+default = ["pg13"]
+pg13 = ["pgrx/pg13", "pgrx-tests/pg13" ]
+pg14 = ["pgrx/pg14", "pgrx-tests/pg14" ]
+pg15 = ["pgrx/pg15", "pgrx-tests/pg15" ]
+pg16 = ["pgrx/pg16", "pgrx-tests/pg16" ]
+pg17 = ["pgrx/pg17", "pgrx-tests/pg17" ]
+pg18 = ["pgrx/pg18", "pgrx-tests/pg18" ]
+pg_test = []
+
+[dependencies]
+pgrx = "=0.16.1"
+serde_json = "1.0.149"
+sysinfo = "0.37.2"
+
+[dev-dependencies]
+pgrx-tests = "=0.16.1"
+
+[profile.dev]
+panic = "unwind"
+
+[profile.release]
+panic = "unwind"
+opt-level = 3
+lto = "fat"
+codegen-units = 1
diff --git a/pgerr.control b/pgerr.control
new file mode 100644
index 0000000..48ae20b
--- /dev/null
+++ b/pgerr.control
@@ -0,0 +1,6 @@
+comment = 'pgerr:  Created by pgrx'
+default_version = '@CARGO_VERSION@'
+module_pathname = 'pgerr'
+relocatable = false
+superuser = true
+trusted = false
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..2fa879e
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,2 @@
+- Install `cargo`, `pgrx` and initialize
+- run with `cargo pgrx run p17`
\ No newline at end of file
diff --git a/src/bin/pgrx_embed.rs b/src/bin/pgrx_embed.rs
new file mode 100644
index 0000000..57483f1
--- /dev/null
+++ b/src/bin/pgrx_embed.rs
@@ -0,0 +1 @@
+::pgrx::pgrx_embed!();
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..dfa7cc5
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,67 @@
+use std::{thread, time::Duration};
+
+use pgrx::prelude::*;
+use sysinfo::System;
+
+::pgrx::pg_module_magic!(name, version);
+
+#[pg_extern]
+fn pgerr() -> String {
+    String::from("pgerr extension running!")
+}
+
+pub struct SystemMetrics {
+    pub cpu_usage: f32,
+    pub used_memory: f32,
+    pub total_memory: f32,
+}
+
+fn get_metrics() -> SystemMetrics {
+    let mut sys = System::new_all();
+
+    sys.refresh_all();
+    thread::sleep(Duration::from_millis(500));
+    sys.refresh_all();
+
+    SystemMetrics {
+        cpu_usage: sys.global_cpu_usage(),
+        used_memory: sys.used_memory() as f32,
+        total_memory: sys.total_memory() as f32,
+    }
+}
+
+fn convert_bytes(byte_value: &mut f32, iters: Option<i32>) {
+    let iters = iters.unwrap_or(3);
+
+    for _ in 0..iters {
+        *byte_value /= 1024.0;
+    }
+}
+
+
+#[pg_extern]
+fn sys_stats(json: bool) -> String {
+    let mut stats = get_metrics();
+    convert_bytes(&mut stats.used_memory, None);
+    convert_bytes(&mut stats.total_memory, None);
+
+    let result = if json {
+        format!(
+            "
+{{
+    \"cpu\": {},
+    \"ram_used\": {},
+    \"ram_total\": {}
+}}
+        ",
+            stats.cpu_usage, stats.used_memory, stats.total_memory
+        )
+    } else {
+        format!(
+            "cpu={},ram used={}GB, ram total={}GB",
+            stats.cpu_usage, stats.used_memory, stats.total_memory
+        )
+    };
+
+    result
+}
diff --git a/tests/pg_regress/expected/setup.out b/tests/pg_regress/expected/setup.out
new file mode 100644
index 0000000..5de6f0f
--- /dev/null
+++ b/tests/pg_regress/expected/setup.out
@@ -0,0 +1,3 @@
+-- this setup file is run immediately after the regression database is (re)created
+-- the file is optional but you likely want to create the extension
+CREATE EXTENSION pgerr;
diff --git a/tests/pg_regress/sql/setup.sql b/tests/pg_regress/sql/setup.sql
new file mode 100644
index 0000000..5de6f0f
--- /dev/null
+++ b/tests/pg_regress/sql/setup.sql
@@ -0,0 +1,3 @@
+-- this setup file is run immediately after the regression database is (re)created
+-- the file is optional but you likely want to create the extension
+CREATE EXTENSION pgerr;