Prompt Title: magento cat_p cache issue

By default, when you save a product programmatically in Magento 2, the cache for the product and its related data is cleared. This includes the cache tags cat_p and catalog_product_, which are used to cache product-related data such as product pages, category pages, and search results.

However, in some cases, clearing the cat_p cache tag may not be desirable, as it can result in cache misses and slower page load times. To prevent Magento from clearing the cat_p cache tag when saving products programmatically, you can modify the cache invalidation settings.

Here are the steps you can follow:

1. Open your Magento 2 installation and navigate to the app/etc/env.php file.
2. Find the cache section of the file and locate the frontend cache settings. You should see a invalidate_tags parameter that lists the cache tags to be cleared when certain events occur, such as saving a product.

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'cache' => [
    'frontend' => [
        'invalidate_after' => 1800,
        'invalidate_tags' => [
            'catalog_product_' // This will clear all product-related cache tags, including `cat_p`
        ],
    ],
],

3. To prevent Magento from clearing the cat_p cache tag, you can remove it from the invalidate_tags parameter. You can also add other cache tags that you want to preserve.

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'cache' => [
    'frontend' => [
        'invalidate_after' => 1800,
        'invalidate_tags' => [
            'catalog_product_attribute',
            'cataloginventory_stock',
            // Add any other cache tags you want to preserve
        ],
    ],
],

4. Save the env.php file and clear the Magento cache.

After making these changes, when you save products programmatically, Magento will no longer clear the cat_p cache tag, and the related product pages will remain cached. However, keep in mind that this may increase the likelihood of stale data being served from the cache, so be sure to test and monitor your site's performance after making these changes.