Listed all the indexes as the official doc says: https://docs.mongodb.com/v3.2/tutorial/manage-indexes/
now i only have the index that the mongo cant drop:
Indexes for objects:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.objects"
}
]
Indexes for search:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.search"
}
]
Indexes for searchpost:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.searchpost"
}
]
Indexes for searchtopic:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.searchtopic"
}
]
Indexes for sessions:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.sessions"
}
]
Indexes for system.indexes:
[ ]
Indexes for system.users:
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "nodebb.system.users"
}
]