问题
How can I get or figure out the size of a document stored in Cosmos DB?
Is this something already stored within document?
回答1:
If you get (or query) a document, you can then look at the headers that come back, specifically x-ms-resource-usage, which will contain a documentsSize attribute (representing a document's size in kb).
In node/javascript, you'd make a call that looks something like:
client.readDocument(docLink, function (err, doc, headers) {
...
})
You'd want to look at headers['x-ms-resource-usage'].
回答2:
Per my experience, all the resources created in azure cosmosdb will automatically generate the following attributes:
_rid
_etag
_ts
_self
id
You could find the meaning of these attributes from here.
In addition , the index strategy also takes up space in your cosmos db.
I search the REST API for Azure Cosmos DB but didn't find the method get the document size directly.
However, the query in cosmosdb consumes RU and RU is related to document size. You could refer to the list mentioned in this article.
Please check the RU when you search documents on portal.
You could also refer to this thread,maybe it has some implications for you.
Hope it helps you.
来源：https://stackoverflow.com/questions/46822854/get-document-size-in-cosmos-db