Due to a marketing campaign, a website is experiencing a very large number of simultaneously placed orders, which is affecting checkout performance…

Option A is correct because enabling asynchronous indexing can improve the checkout performance

by reducing the database load and avoiding locking issues. Asynchronous indexing allows the

indexers

to

run

in

the

background

without

affecting

the

frontend

operations. The

command bin/magento config:set dev/grid/async_indexing 1 can be used to enable this option in the

production mode1.

Option C is correct because creating a new database and splitting the sales tables can also improve

the checkout performance by distributing the database load and avoiding contention. Splitting the

database allows the checkout and order management operations to use a separate master database

from the rest of the Magento application tables. The command bin/magento setup:db-schema:split-

sales --host="" --dbname="" --username=""

--password="" can be used to configure this feature2.

Option B is incorrect because enabling asynchronous email notifications does not affect the checkout

performance directly. Asynchronous email notifications allow the order confirmation emails to be

sent in batches by a cron job instead of immediately after placing an order. This option can reduce

the server load and improve the customer experience, but it does not impact the checkout process

itself3.

Option D is incorrect because there is no such deploy mode as siege in Magento 2. The available

deploy modes are default, developer, and production. Changing the deploy mode can affect the

performance, caching, and error handling of the Magento application, but it does not directly affect

the checkout performance4.

Option E is incorrect because there is no such admin panel setting as multithreaded checkout

processing in Magento 2. The number of PHP threads used for checkout is determined by the web

server configuration and the PHP-FPM settings, not by the Magento application settings. Increasing

the number of PHP threads may improve the checkout performance, but it also requires more server

resources and may cause other issues5.

Reference:

1: Asynchronous indexing | Adobe Commerce Developer Guide

2: Split database performance solution | Adobe Commerce Developer Guide

3: Sales Emails | Adobe Commerce User Guide

4: Set up Magento modes | Adobe Commerce Developer Guide

5: PHP-FPM configuration settings | Adobe Commerce Developer Guide