Milvus is committed to providing the best vector databases to power AI applications and vector similarity search. However, the team is continuously working to bring in more features and the best utilities to enhance user experience. This page lists out some known limitations that the users may encounter when using Milvus.
Length of a resource name
Resource
Limit
Collection
255 characters
Field
255 characters
Index
255 characters
Partition
255 characters
Naming rules
The name of a resource can contain numbers, letters, and underscores (_). A resource name must start with a letter or an underscore (_).
Number of resources
Resource
Limit
Collection
65,536
Connection / proxy
65,536
Number of resources in a collection
Resource
Limit
Partition
4,096
Shard
16
Field
64
Index
1
Entity
unlimited
Length of a string
Data type
Limit
VARCHAR
65,535
Dimensions of a vector
Property
Limit
Dimension
32,768
Input and Output per RPC
Operation
Limit
Insert
512 MB
Search
512 MB
Query
512 MB
Load limits
In current release, data to be load must be under 90% of the total memory resources of all query nodes to reserve memory resources for execution engine.
Search limits
Vectors
Limit
topk (number of the most similar result to return)
16,384
nq (number of the search requests)
16,384
Index limits on different search types
The following table provides an overview of the support for various search behaviors across different index types.
