IstiodConnectionFailures = monitoring.NewSum(
		"istiod_connection_failures",
		"The total number of connection failures to Istiod",
	)

	// istiodDisconnections records total number of unexpected disconnections by Istiod.
	istiodDisconnections = monitoring.NewSum(
		"istiod_connection_terminations",
		"The total number of connection errors to Istiod",
	)

var (
	errorTag = monitoring.CreateLabel(errorlabel)

	csrCounts = monitoring.NewSum(
		"citadel_server_csr_count",
		"The number of CSRs received by Citadel server.",
	)

	authnErrorCounts = monitoring.NewSum(
		"citadel_server_authentication_failure_count",
		"The number of authentication failures.",
	)

	csrParsingErrorCounts = monitoring.NewSum(
		"citadel_server_csr_parsing_err_count",

)

var (
	totalInjections = monitoring.NewSum(
		"sidecar_injection_requests_total",
		"Total number of sidecar injection requests.",
	)

	totalSuccessfulInjections = monitoring.NewSum(
		"sidecar_injection_success_total",
		"Total number of successful sidecar injection requests.",
	)

	totalFailedInjections = monitoring.NewSum(
		"sidecar_injection_failure_total",

var (
	PortLabel = monitoring.CreateLabel("port")
	Metrics   = &EchoMetrics{
		HTTPRequests: monitoring.NewSum(
			"istio_echo_http_requests_total",
			"The number of http requests total",
		),
		GrpcRequests: monitoring.NewSum(
			"istio_echo_grpc_requests_total",
			"The number of grpc requests total",
		),
		TCPRequests: monitoring.NewSum(
			"istio_echo_tcp_requests_total",
			"The number of tcp requests total",
		),
	}

package client

import (
	"istio.io/istio/pkg/monitoring"
)

var (
	requests = monitoring.NewSum(
		"dns_requests_total",
		"Total number of DNS requests.",
	)

	upstreamRequests = monitoring.NewSum(
		"dns_upstream_requests_total",
		"Total number of DNS requests forwarded to upstream.",
	)

	failures = monitoring.NewSum(
		"dns_upstream_failures_total",
		"Total number of DNS failures.",
	)

        }
        [OldBase, OldSub, NewBase, NewSub].each {
            classes[it.simpleName] = instanceScopedPool.get(it.name)
        }

        classes['OldBase'].superclass = classes['OldSuperInternal']
        classes['NewBase'].superclass = classes['NewSuperInternal']
        classes['OldSub'].superclass = classes['OldBase']
        classes['NewSub'].superclass = classes['NewBase']

	metricWebhookConfigurationUpdateError = monitoring.NewSum(
		"galley_validation_config_update_error",
		"k8s webhook configuration update error",
	)
	metricWebhookConfigurationUpdates = monitoring.NewSum(
		"galley_validation_config_updates",
		"k8s webhook configuration updates")
	metricWebhookConfigurationLoadError = monitoring.NewSum(
		"galley_validation_config_load_error",

	nodeTag = monitoring.CreateLabel("node")
	typeTag = monitoring.CreateLabel("type")

	TotalXDSInternalErrors = monitoring.NewSum(
		"pilot_total_xds_internal_errors",
		"Total number of internal XDS errors in pilot.",
	)

	ExpiredNonce = monitoring.NewSum(
		"pilot_xds_expired_nonce",
		"Total number of XDS requests with an expired nonce.",
	)

)

var (
	metricWebhookPatchAttempts = monitoring.NewSum(
		"webhook_patch_attempts_total",
		"Webhook patching attempts",
	)

	metricWebhookPatchRetries = monitoring.NewSum(
		"webhook_patch_retries_total",
		"Webhook patching retries",
	)

	metricWebhookPatchFailures = monitoring.NewSum(
		"webhook_patch_failures_total",
		"Webhook patching total failures",
	)
)

const (

	}

	for i := initialSize; i > 0; i = i / 10 {
		newBuff := target.Allocate(uint64(i))
		if cap(newBuff) < initialSize {
			t.Fatalf("allocator is now allowed to shrink memory")
		}
		if len(newBuff) != i {
			t.Fatalf("unexpected length of the buffer, expected: %v, got: %v", i, len(newBuff))
		}
	}
}

func TestAllocatorZero(t *testing.T) {
	target := &Allocator{}