This is definitely not an easy question to answer because of the multiple criteria coming into play here.
Here is a list that should help you be able to plan ahead.
Number of records
- Total amount of variants (and not products)
- Multiply this amount by the number of sort orders you use.
If you use only Relevance, then you don’t need to multiply
- Collections / Blog posts / Pages if enabled: Simply the total amount of items (often too small to be relevant)
Number of operations
This one is trickier and depends on your use case.
- An update of a variant will update all the other related variants of the same product, which will cost one operation per variant of the product
- On an update of a product / a variant, we need to run a search to check if a variant that we had has been removed, but the search operation is free
- Depending on the point before, we’ll delete the removed ones, which will cost one operation per delete
- If you’ve activated our Collection Search Page feature, every time a collection is updated, we’ll need to run an operation for each of its products.
Since our app reacts to webhooks sent by Shopify when you update your products or variants, then the amount of operations will mostly be linked to the amount of updates you and / or your apps will do.
If you have an app updating your prices all the time for instance, then it might go up pretty fast.
In the end, the conclusion is unfortunately that it’s a bit hard to plan.
Fortunately, there is an easy way of trying this out! You can use Algolia for 14 days with a free trial (no CC required).
You can simply set it up with a really small amount of steps, without even installing its front-end and check after a few days of usage how many operations were consumed, and then decide.