Benchmarking MySQL bulk load into InnoDB and MyISAM

bench_mysql_innodb_myisam.sh

#!/usr/bin/env bash

function create_tables() {
    tbl_1=$(cat <<EOF
    CREATE TABLE IF NOT EXISTS test_innodb (
        user_id CHAR(32) NOT NULL PRIMARY KEY,
        user_email VARCHAR(254) NOT NULL,
        created_at DATETIME NOT NULL,
        tags JSON NOT NULL DEFAULT ('{}'),
        shared_with JSON NOT NULL DEFAULT ('{}'),
        is_completed TINYINT NOT NULL DEFAULT 0,
        is_overdue TINYINT NOT NULL DEFAULT 0,
        description TEXT NOT NULL,
        title VARCHAR(255) NOT NULL,
        user_name VARCHAR(255) NOT NULL
    );
EOF
)
    tbl_2=$(cat <<EOF
    CREATE TABLE IF NOT EXISTS test_myisam (
        user_id CHAR(32) NOT NULL PRIMARY KEY,
        user_email VARCHAR(254) NOT NULL,
        created_at DATETIME NOT NULL,
        tags JSON NOT NULL DEFAULT ('{}'),
        shared_with JSON NOT NULL DEFAULT ('{}'),
        is_completed TINYINT NOT NULL DEFAULT 0,
        is_overdue TINYINT NOT NULL DEFAULT 0,
        description TEXT NOT NULL,
        title VARCHAR(255) NOT NULL,
        user_name VARCHAR(255) NOT NULL)
        ENGINE = MYISAM
    ;
EOF
)

    declare tables=()
    tables+=("$tbl_1")
    tables+=("$tbl_2")
    for tbl in "${tables[@]}"; do
        mysql -D test -Be "$tbl"
    done
}

function truncate() {
    local tbl="$1"
    printf "%s\n" "TRUNCATING table ${tbl}"
    mysql -D test -Be "TRUNCATE ${tbl}"
}

function get_lines() {
    local filename="$1"
    num_lines=$(($(wc -l "$filename" | cut -d' ' -f1,1)-1))
    printf "%s\n" "${num_lines}"
}

function load() {
    local load_time=""
    local tbl="$1"
    local file_path="$2"

    temp_file=$(mktemp)
    printf "%s\n" '\sql SET GLOBAL local_infile=1;' > "$temp_file"
    printf "%s\n" '\use test;' >> "$temp_file"
    printf "%s\n" "util.importTable('${file_path}', {table: '${tbl}', fieldsTerminatedBy: ',', fieldsEnclosedBy: \"'\", fieldsOptionallyEnclosed: true, fieldsEscapedBy: '\\\\', showProgress: true, sessionInitSQL: [\"SET time_zone='+00:00';\"]})" >> "$temp_file"

    mysqlsh --quiet-start=1 -i <<< $(cat $temp_file)

    rm -f "$temp_file"
}


innodb_tbl_name="test_innodb"
myisam_tbl_name="test_myisam"
file_path="/mnt/ramdisk/25M.csv"
file_path_split_1="/mnt/ramdisk/xaa.csv"
file_path_split_2="/mnt/ramdisk/xab.csv"

file_size=$(stat -c "%s" "${file_path}" | numfmt --to=iec-i)

printf "%s\n" "Getting line count of input file ${file_path}"
num_lines=$(get_lines "${file_path}")
printf "%s\n" "${file_path} has ${num_lines} lines and is ${file_size}"

printf "%s\n" "Splitting ${file_path} into two equal chunks"
pushd "$(dirname ${file_path})"
rm -f xaa.csv xab.csv
tail -n +2 "$file_path" | split -l $((${num_lines} / 2)) --additional-suffix ".csv"
popd

printf "\n%s\n" "Creating tables for InnoDB (${innodb_tbl_name}) and MyISAM (${myisam_tbl_name})"
create_tables

printf "\n%s\n" "Truncating tables"
truncate "$innodb_tbl_name"
truncate "$myisam_tbl_name"

printf "\n%s\n" "Loading data into empty ${innodb_tbl_name} with LOAD DATA INFILE"
load "$innodb_tbl_name" "$file_path_split_1"

printf "\n%s\n" "Loading data into empty ${myisam_tbl_name} with LOAD DATA INFILE"
load "$myisam_tbl_name" "$file_path_split_1"

printf "\n%s\n" "Loading data into non-empty ${innodb_tbl_name} with LOAD DATA INFILE"
load "$innodb_tbl_name" "$file_path_split_2"

printf "\n%s\n" "Loading data into non-empty ${myisam_tbl_name} with LOAD DATA INFILE"
load "$myisam_tbl_name" "$file_path_split_2"

❯ ./bench_mysql.sh
Getting line count of input file /mnt/ramdisk/25M.csv
/mnt/ramdisk/25M.csv has 25000000 lines and is 5.2Gi
Splitting /mnt/ramdisk/25M.csv into two equal chunks
/mnt/ramdisk ~
~

Creating tables for InnoDB (test_innodb) and MyISAM (test_myisam)

Truncating tables
TRUNCATING table test_innodb
TRUNCATING table test_myisam

Loading data into empty test_innodb with LOAD DATA INFILE
Creating a Classic session to '[email protected]'
Your MySQL connection id is 430273
Server version: 8.0.34 MySQL Community Server - GPL
No default schema selected; type \use <schema> to set one.
Query OK, 0 rows affected (0.0002 sec)
Default schema set to `test`.
Importing from file '/mnt/ramdisk/xaa.csv' to table `test`.`test_innodb` in MySQL Server at 192.168.1.179:3306 using 8 threads
...
100% (2.75 GB / 2.75 GB), 0.00 B/s
File '/mnt/ramdisk/xaa.csv' (2.75 GB) was imported in 6 min 57.2374 sec at 6.59 MB/s
Total rows affected in test.test_innodb: Records: 12500000  Deleted: 0  Skipped: 0  Warnings: 0
Bye!

---

Loading data into empty test_myisam with LOAD DATA INFILE
Creating a Classic session to '[email protected]'
Your MySQL connection id is 430492
Server version: 8.0.34 MySQL Community Server - GPL
No default schema selected; type \use <schema> to set one.
Query OK, 0 rows affected (0.0007 sec)
Default schema set to `test`.
Importing from file '/mnt/ramdisk/xaa.csv' to table `test`.`test_myisam` in MySQL Server at 192.168.1.179:3306 using 8 threads
...
100% (2.75 GB / 2.75 GB), 1.44 MB/s
File '/mnt/ramdisk/xaa.csv' (2.75 GB) was imported in 11 min 18.4550 sec at 4.05 MB/s
Total rows affected in test.test_myisam: Records: 12500000  Deleted: 0  Skipped: 0  Warnings: 0
Bye!