Related configuration of queryCoord, used to manage topology and load balancing for the query nodes, and handoff from growing segments to sealed segments.
queryCoord.autoHandoff
Description
Default Value
Switch value to control if to automatically replace a growing segment with the corresponding indexed sealed segment when the growing segment reaches the sealing threshold.
If this parameter is set false, Milvus simply searches the growing segments with brute force.
true
queryCoord.autoBalance
Description
Default Value
Switch value to control if to automatically balance the memory usage among query nodes by distributing segment loading and releasing operations evenly.
true
queryCoord.autoBalanceChannel
Description
Default Value
Enable auto balance channel
true
queryCoord.balancer
Description
Default Value
auto balancer used for segments on queryNodes
ScoreBasedBalancer
queryCoord.globalRowCountFactor
Description
Default Value
the weight used when balancing segments among queryNodes
0.1
queryCoord.scoreUnbalanceTolerationFactor
Description
Default Value
the least value for unbalanced extent between from and to nodes when doing balance
0.05
queryCoord.reverseUnBalanceTolerationFactor
Description
Default Value
the largest value for unbalanced extent between from and to nodes after doing balance
1.3
queryCoord.overloadedMemoryThresholdPercentage
Description
Default Value
The threshold of memory usage (in percentage) in a query node to trigger the sealed segment balancing.
90
queryCoord.balanceIntervalSeconds
Description
Default Value
The interval at which query coord balances the memory usage among query nodes.
60
queryCoord.memoryUsageMaxDifferencePercentage
Description
Default Value
The threshold of memory usage difference (in percentage) between any two query nodes to trigger the sealed segment balancing.
30
queryCoord.rowCountFactor
Description
Default Value
the row count weight used when balancing segments among queryNodes
0.4
queryCoord.segmentCountFactor
Description
Default Value
the segment count weight used when balancing segments among queryNodes
0.4
queryCoord.globalSegmentCountFactor
Description
Default Value
the segment count weight used when balancing segments among queryNodes
0.1
queryCoord.collectionChannelCountFactor
Description
Default Value
the channel count weight used when balancing channels among queryNodes,
A higher value reduces the likelihood of assigning channels from the same collection to the same QueryNode. Set to 1 to disable this feature.
10
queryCoord.segmentCountMaxSteps
Description
Default Value
segment count based plan generator max steps
50
queryCoord.rowCountMaxSteps
Description
Default Value
segment count based plan generator max steps
50
queryCoord.randomMaxSteps
Description
Default Value
segment count based plan generator max steps
10
queryCoord.growingRowCountWeight
Description
Default Value
the memory weight of growing segment row count
4
queryCoord.delegatorMemoryOverloadFactor
Description
Default Value
the factor of delegator overloaded memory
0.1
queryCoord.balanceCostThreshold
Description
Default Value
the threshold of balance cost, if the difference of cluster's cost after executing the balance plan is less than this value, the plan will not be executed
0.001
queryCoord.channelTaskTimeout
Description
Default Value
1 minute
60000
queryCoord.segmentTaskTimeout
Description
Default Value
2 minute
120000
queryCoord.heartbeatAvailableInterval
Description
Default Value
10s, Only QueryNodes which fetched heartbeats within the duration are available
10000
queryCoord.distRequestTimeout
Description
Default Value
the request timeout for querycoord fetching data distribution from querynodes, in milliseconds
5000
queryCoord.heatbeatWarningLag
Description
Default Value
the lag value for querycoord report warning when last heatbeat is too old, in milliseconds
5000
queryCoord.checkHealthInterval
Description
Default Value
3s, the interval when query coord try to check health of query node
3000
queryCoord.checkHealthRPCTimeout
Description
Default Value
100ms, the timeout of check health rpc to query node
2000
queryCoord.brokerTimeout
Description
Default Value
5000ms, querycoord broker rpc timeout
5000
queryCoord.collectionRecoverTimes
Description
Default Value
if collection recover times reach the limit during loading state, release it
3
queryCoord.observerTaskParallel
Description
Default Value
the parallel observer dispatcher task number
16
queryCoord.checkAutoBalanceConfigInterval
Description
Default Value
the interval of check auto balance config
10
queryCoord.checkNodeSessionInterval
Description
Default Value
the interval(in seconds) of check querynode cluster session
60
queryCoord.gracefulStopTimeout
Description
Default Value
seconds. force stop node without graceful stop
5
queryCoord.enableStoppingBalance
Description
Default Value
whether enable stopping balance
true
queryCoord.channelExclusiveNodeFactor
Description
Default Value
the least node number for enable channel's exclusive mode
4
queryCoord.collectionObserverInterval
Description
Default Value
the interval of collection observer
200
queryCoord.checkExecutedFlagInterval
Description
Default Value
the interval of check executed flag to force to pull dist
100
queryCoord.updateCollectionLoadStatusInterval
Description
Default Value
5m, max interval of updating collection loaded status for check health
5
queryCoord.cleanExcludeSegmentInterval
Description
Default Value
the time duration of clean pipeline exclude segment which used for filter invalid data, in seconds
60
queryCoord.ip
Description
Default Value
TCP/IP address of queryCoord. If not specified, use the first unicastable address
queryCoord.port
Description
Default Value
TCP port of queryCoord
19531
queryCoord.grpc.serverMaxSendSize
Description
Default Value
The maximum size of each RPC request that the queryCoord can send, unit: byte
536870912
queryCoord.grpc.serverMaxRecvSize
Description
Default Value
The maximum size of each RPC request that the queryCoord can receive, unit: byte
268435456
queryCoord.grpc.clientMaxSendSize
Description
Default Value
The maximum size of each RPC request that the clients on queryCoord can send, unit: byte
268435456
queryCoord.grpc.clientMaxRecvSize
Description
Default Value
The maximum size of each RPC request that the clients on queryCoord can receive, unit: byte
