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Adapt implementation to changing MaintenanceQuota on a fly

pull/7286/head
ivyazmitinov 2023-10-29 01:40:38 +07:00
parent 481aa99205
commit b3bfca9ac6
1 changed files with 21 additions and 10 deletions
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21
src/backend/distributed/connection/shared_connection_stats.c
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@ -425,8 +425,7 @@ IncrementSharedConnectionCounterInternal(uint32 externalFlags,
/* Increment counter if a slot available */
bool connectionSlotAvailable = true;
/* When GetSharedPoolSizeMaintenanceQuota() == 0, treat maintenance connections as regular */
bool maintenanceConnection = (GetSharedPoolSizeMaintenanceQuota() > 0 && (externalFlags & MAINTENANCE_CONNECTION));
bool maintenanceConnection = externalFlags & MAINTENANCE_CONNECTION;
if (checkLimits)
{
WorkerNode *workerNode = FindWorkerNode(hostname, port);
@ -434,15 +433,28 @@ IncrementSharedConnectionCounterInternal(uint32 externalFlags,
int currentConnectionsLimit = connectionToLocalNode
? GetLocalSharedPoolSize()
: GetMaxSharedPoolSize();
int currentConnectionsCount;
if (GetSharedPoolSizeMaintenanceQuota() > 0)
{
int maintenanceQuota = (int) ceil((double) currentConnectionsLimit * GetSharedPoolSizeMaintenanceQuota());
/* Connections limit should never go below 1 */
currentConnectionsLimit = Max(maintenanceConnection
? maintenanceQuota
: currentConnectionsLimit - maintenanceQuota, 1);
int currentConnectionsCount = maintenanceConnection
currentConnectionsCount = maintenanceConnection
? workerNodeConnectionEntry->maintenanceConnectionsCount
: workerNodeConnectionEntry->regularConnectionsCount;
}
else
{
/* When maintenance quota disabled, all connections treated equally*/
currentConnectionsCount = (workerNodeConnectionEntry->maintenanceConnectionsCount +
workerNodeConnectionEntry->regularConnectionsCount);
}
bool remoteNodeLimitExceeded = currentConnectionsCount + 1 > currentConnectionsLimit;
/*
* For local nodes, solely relying on citus.max_shared_pool_size or
* max_connections might not be sufficient. The former gives us
@ -543,8 +555,7 @@ DecrementSharedConnectionCounterInternal(uint32 externalFlags,
Assert(workerNodeConnectionEntry->regularConnectionsCount > 0 ||
workerNodeConnectionEntry->maintenanceConnectionsCount > 0);
/* When GetSharedPoolSizeMaintenanceQuota() == 0, treat maintenance connections as regular */
if ((GetSharedPoolSizeMaintenanceQuota() > 0 && (externalFlags & MAINTENANCE_CONNECTION)))
if (externalFlags & MAINTENANCE_CONNECTION)
{
workerNodeConnectionEntry->maintenanceConnectionsCount -= 1;
}