divi255

/* build with
    gcc -c -Wall -Werror -fpic -O3 driver.c
    gcc -shared -o libmydriver.so -O3 driver.o
    */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct Data {
  char port[20];

divi255

/*
shared lib with safe calls, for std

put in Cargo.toml
[lib]
name = "test"
crate-type = [ "cdylib" ]
*/
use std::cell::RefCell;

divi255

import logging

def rust_emit_log(*args):
    # Override from Rust with pyfunction
    pass

class RustLogHandler(logging.Handler):

    def emit(self, record):
        msg = f'{record.name}: {record.getMessage()}'

divi255

#!/usr/bin/env python3

import sys
import tempfile
import os
import sphinx.ext.autodoc
from textwrap import dedent
from types import SimpleNamespace

_d = SimpleNamespace(result='')

divi255

Optimizing postgresql table for more than 100K inserts per second

• Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
• Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
• Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
• Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
• Add synchronous_commit = off to postgresql.conf.
• Use table inheritance for fast removal of old data:

divi255

---
- hosts:
    - all
  remote_user: root
  tasks:
    - name: update everything
      apt: upgrade=dist force_apt_get=yes autoclean=yes
    - name: check if a reboot is necessary
      register: reboot_required_file
      stat: path=/var/run/reboot-required get_md5=no