// newBookie creates a reservations system.
func newBookie(metrics *StoreMetrics) *bookie {
b := &bookie{
metrics: metrics,
maxReservations: envutil.EnvOrDefaultInt("COCKROACH_MAX_RESERVATIONS", defaultMaxReservations),
maxReservedBytes: envutil.EnvOrDefaultBytes("COCKROACH_MAX_RESERVED_BYTES", defaultMaxReservedBytes),
}
b.mu.reservationsByRangeID = make(map[roachpb.RangeID]reservationRequest)
return b
}
// newBookie creates a reservations system and starts its timeout queue.
func newBookie(
clock *hlc.Clock, stopper *stop.Stopper, metrics *StoreMetrics, reservationTimeout time.Duration,
) *bookie {
b := &bookie{
clock: clock,
metrics: metrics,
reservationTimeout: reservationTimeout,
maxReservations: envutil.EnvOrDefaultInt("COCKROACH_MAX_RESERVATIONS", defaultMaxReservations),
maxReservedBytes: envutil.EnvOrDefaultBytes("COCKROACH_MAX_RESERVED_BYTES", defaultMaxReservedBytes),
}
b.mu.reservationsByRangeID = make(map[roachpb.RangeID]*reservation)
b.start(stopper)
return b
}
noteworthyUsageBytes int64
curBytesCount *metric.Counter
maxBytesHist *metric.Histogram
}
// maxAllocatedButUnusedMemoryBlocks determines the maximum difference
// between the amount of memory used by a monitor and the amount of
// memory reserved at the upstream pool before the monitor
// relinquishes the memory back to the pool. This is useful so that a
// monitor currently at the boundary of a block does not cause
// contention when accounts cause its allocation counter to grow and
// shrink slightly beyond and beneath an allocation block
// boundary. The difference is expressed as a number of blocks of size
// `poolAllocationSize`.
var maxAllocatedButUnusedMemoryBlocks = envutil.EnvOrDefaultInt("COCKROACH_MAX_ALLOCATED_UNUSED_BLOCKS", 10)
// DefaultPoolAllocationSize specifies the unit of allocation used by
// a monitor to reserve and release memory to a pool.
var DefaultPoolAllocationSize = envutil.EnvOrDefaultInt64("COCKROACH_MEMORY_ALLOCATION_CHUNK_SIZE", 10*1024)
// MakeMonitor creates a new monitor.
// Arguments:
// - name is used to annotate log messages, can be used to distinguish
// monitors.
//
// - curCount and maxHist are the metric objects to update with usage
// statistics.
//
// - increment is the block size used for upstream allocations from
// the pool. Note: if set to 0 or lower, the default pool allocation