[Bug]: Unexpected search cache size for diskann

[foxspy]

Is there an existing issue for this?

• [X] I have searched the existing issues

Environment

- Milvus version:
- Deployment mode(standalone or cluster):
- MQ type(rocksmq, pulsar or kafka):    
- SDK version(e.g. pymilvus v2.0.0rc2):
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

For cloud-enviroment, config should be fetched from AutoIndex config; however, currently the search_cache size is fetched from yaml instead of autoIndex, so search_cache size may be set larger or smaller than expected value.

Expected Behavior

No response

Steps To Reproduce

No response

Milvus Log

No response

Anything else?

No response

[foxspy]

/unassign @yanliang567 /assign @foxspy