When bundles are being built Servd will run `composer install` to make sure all of your project's packages are ready and waiting for you when you deploy the bundle.

Sometimes composer can experience an out of memory error during this process as the Servd Task Runner limits its maximum memory to 1.5GB.

There are a few things you can do to ensure that this is no longer a problem.

You should always commit a `composer.lock` file.

It not only vastly reduces the amount of memory and time needed to run `composer install`, it also ensures that the versions of packages installed in your bundle are an exact match against those you were using during local development.
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Composer 2 is available for use on Servd and has a lot of performance improvements built in. Some Craft plugins are not compatible with Composer 2 so we still default to Composer 1, but you can switch between versions on the Project Settings > Build & Deploy page.
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Changing this will switch the version of composer used to build your bundles and won't have any impact on previously built or currently deployed bundles.

Servd requires a package called `yiisoft/yii2-redis` to be installed so that we're able to store your cache and session files in Redis. The task runner will check to see if you have already included it in your `composer.json` and `composer.lock` files. If it already exists, it doesn't need to do anything else and everyone can get on with their day.

If it doesn't find it, it runs `composer require yiisoft/yii2-redis`. This kicks off a process which checks all of the versions of yii2-redis against all of the versions for your other dependencies to try to find any conflicts. It is this process which often causes out of memory errors.

The solution is simple though: just `composer require yiisoft/yii2-redis` during local development which will add `yii2-redis` to your `composer.json` and `composer.lock` files. Once they're in there and committed, Servd will no longer attempt to install the package and your memory errors should vanish!
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The Servd Assets and Helpers plugin also includes the yii2-redis package as a dependency so if you have the Servd plugin installed in your project, you already have yii2-redis installed too.