PHP/MySQL works way slower on Docker - php

Question

I built a PHP app using MySQL on my local machine. I used the Wamp server.
The app should generate traveling plans 60 000 of them. Then, it should generate some more info about them. That is about 500k SQL INSERT queries.
I made a PHP script that uses while loops to run INSERT statements over and over until the database is populated.
On my local machine whole process lasts about 20 minutes.
The final goal is to make a Docker container containing the app. When somebody pulls the repository from Docker Hub, it should generate data on startup.
I ran into a problem on startup; data generation lasted way longer; in fact, I never achieved to complete the script after it ran for several hours.
Opcache did help a lot. But it's still longer than expected (20 minutes).
With Opcache, it creates about 150k inserts in 30 minutes.
Is there any tips how to make my script faster?
The container has following configuration:
Dockerfile:
FROM php:8.1-fpm-alpine
RUN docker-php-ext-install mysqli && docker-php-ext-enable mysqli
RUN apt-get update && apt-get upgrade -y
# Install build dependencies and the OPcache extension
RUN apk add --no-cache $PHPIZE_DEPS \
&& docker-php-ext-install opcache \
&& apk del $PHPIZE_DEPS
# Copy the opcache.ini into your Docker image
COPY docker/php/opcache.ini /usr/local/etc/php/conf.d/opcache.ini
# Run your application
CMD php-fpm
docker-compose.yml
version: '3.8'
services:
php-apache-environment:
container_name: php-apache
build:
context: ./php
dockerfile: Dockerfile
depends_on:
- db
volumes:
- ./php/src:/var/www/html/
ports:
- 8000:80
db:
container_name: db
image: mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: 12345
MYSQL_DATABASE: turisticka_agencija
MYSQL_USER: root
MYSQL_PASSWORD: 12345
ports:
- "9906:3306"
phpmyadmin:
image: phpmyadmin/phpmyadmin
ports:
- '8080:80'
restart: always
environment:
PMA_HOST: db
depends_on:
- db
Example of the script (one of the functions):
function ponuda(){
$conn = OpenCon();
$conn->query("SET NAMES 'utf8'");
ini_set('max_execution_time', '500');
set_time_limit(500);
for($i=1; $i<60001; $i++){
$query="SELECT CURRENT_DATE + INTERVAL FLOOR(RAND() * 20) DAY AS pocetni";
if ($result = mysqli_query($conn, $query)) {
$row = mysqli_fetch_array($result);
$pocetak=$row["pocetni"];
}
$conn->query("INSERT INTO ponuda (id_ponude, termin_polazak, termin_povratak, cena_putovanja, cena_prevoza, id_lokacije_polaska, id_prevoza) VALUES (".$i.", '".$pocetak."', '".$pocetak."' + INTERVAL FLOOR(1 + RAND()*(10 - 1 + 1)) DAY, ROUND(100 + RAND()*(3000 - 100 + 1), 2), FLOOR(100 + RAND()*(3000 - 100 + 1)), FLOOR(46 + RAND()*(48 - 46 + 1)), FLOOR(1 + RAND()*(5 - 1 + 1)));");
}
echo "Ponuda ".$conn->error;
$conn->query("UPDATE ponuda SET ponuda.termin_polazak = ponuda.termin_polazak - INTERVAL (100) DAY, ponuda.termin_povratak= ponuda.termin_povratak - INTERVAL (100) WHERE ponuda.id_ponude>24378 AND ponuda.id_ponude<34378;");
CloseCon($conn);
provodi();
}

Answer 1

Avoid unnecessary burden on the DB by creating your random numbers and dates in PHP
Your INSERT query can be a prepared statement, prepared once and executed multiple times
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$conn = OpenCon();
$conn->set_charset('utf8mb4');
ini_set('max_execution_time', '500');
set_time_limit(500);
$insert = <<<_SQL;
INSERT INTO ponuda (
id_ponude,
termin_polazak,
termin_povratak,
cena_putovanja,
cena_prevoza,
id_lokacije_polaska,
id_prevoza
) VALUES (?, ?, ?, ?, ?, ?, ?)
_SQL;
// prepare once
$stmt = $conn->prepare($insert);
// bind once
$stmt->bind_param(
'issdiii',
$i,
$departureDate,
$returnDate,
$tripPrice,
$transportCost,
$locationId,
$transportId
);
for ($i = 1; $i <= 60000; $i++) {
$baseDate = strtotime(sprintf('+%d day', rand(0, 20)));
$departureDate = date('Y-m-d', $baseDate);
$returnDate = date('Y-m-d', strtotime(
sprintf('+%d day', rand(1, 10)),
$baseDate
));
$tripPrice = round(100 + lcg_value() * 2900, 2);
$transportCost = rand(100, 3000);
$locationId = rand(46, 48);
$transportId = rand(1, 5);
// execute the statement
$stmt->execute();
}
echo "Ponuda ".$conn->error;
$conn->query("UPDATE ponuda SET ponuda.termin_polazak = ponuda.termin_polazak - INTERVAL (100) DAY, ponuda.termin_povratak= ponuda.termin_povratak - INTERVAL (100) WHERE ponuda.id_ponude>24378 AND ponuda.id_ponude<34378;");
CloseCon($conn);
provodi();