[Bug]: GetIndexInfos RPC is called too frequently

[bigsheeper]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: 2.4&master
- 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

The IndexChecker in querycoord calls the GetIndexInfos RPC too frequently.

Expected Behavior

We should batch segments into a single GetIndexInfos RPC call to avoid frequent RPCs. On the other hand, the frequency of the index checker (currently every 10 seconds) may could be reduced.

milvus/internal/querycoordv2/checkers/index_checker.go

Lines 135 to 141 in 30d396f

	for segment, fields := range targets {
	missingFields := typeutil.NewSet(fields...)
	infos, err := c.broker.GetIndexInfo(ctx, collection.GetCollectionID(), segment)
	if err != nil {
	log.Warn("failed to get indexInfo for segment", zap.Int64("segmentID", segment), zap.Error(err))
	continue
	}

Steps To Reproduce

No response

Milvus Log

No response

Anything else?

No response

[bigsheeper]

related to: #37630

[xiaofan-luan]

@bigsheeper

sems that we can remove the broker since datacoord and indexcoord are now merged?

[bigsheeper]

@bigsheeper

sems that we can remove the broker since datacoord and indexcoord are now merged?

@xiaofan-luan These GetIndexInfos invokes are from querycoord.