pouchdb size increasing whilte deleting and restoring docs

Question

I've noticed that the size of my DB is increasing after deleting / restoring docs with auto-compaction set to true. What do I do wrong?

Here is my code:

var db = new PouchDB("myDB", {adapter: "idb", auto_compaction: true});
var docs = [{_id: "0", name: "foo1"}, {_id: "1", name: "foo2"}];
db.bulkDocs(docs).then(function() {
    db.allDocs({include_docs: true}).then(function(result) {
        docs = result.rows.map(function(row) {
            return row.doc;
        });   
    };
};

function remove() {
    for (var i in docs) {
        docs[i]._deleted = true;
    } 
    return db.bulkDocs(docs);           
};

function restore() {
    for (var i in docs) {
        delete docs[i]._deleted;
        delete docs[i]._rev;
    } 
    return db.bulkDocs(docs);   
}

// Calling this function increases the size of the DB
function test() {
    return remove(docs).then(restore);
}

Answer 1

Two things:

1) Even if you are using auto-compaction, the database size might increase, because the underlying storage engine may have its own quirks. For instance, if you are using the SQLite Plugin, then SQLite may require an explicit VACUUM command to decrease the size. Otherwise it will decrease the on-disk size when it feels like it. So it depends on how you are measuring the size.

2) Even if you are using auto-compaction, PouchDB will always store the revision hash of the old revisions. In other words, it keeps a record of the entire revision history of the document, usually represented by an array of string hashes. In practice, with auto-compaction, this means that the database will increase by the size of a string like '19136B05-18F9-CCBF-96C1-6AC11EE9B06E' for every revision.

Answer 2

That's not the correct way to delete documents from PouchDB.

Use: db.remove(doc, [options], [callback])

Please check here

Good luck