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Add logging measuring commit compute duration

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This commit is contained in:
Lukas Joswiak 2022-04-20 14:31:14 -07:00
parent 02fc80f12e
commit f13a8df5d9
4 changed files with 21 additions and 0 deletions
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1
fdbclient/ServerKnobs.cpp
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@ -450,6 +450,7 @@ void ServerKnobs::initialize(Randomize randomize, ClientKnobs* clientKnobs, IsSi
init( MAX_COMMIT_UPDATES, 2000 ); if( randomize && BUGGIFY ) MAX_COMMIT_UPDATES = 1;
init( MAX_PROXY_COMPUTE, 2.0 );
init( MAX_COMPUTE_PER_OPERATION, 0.1 );
init( MAX_COMPUTE_DURATION_LOG_CUTOFF, 0.15 );
init( PROXY_COMPUTE_BUCKETS, 20000 );
init( PROXY_COMPUTE_GROWTH_RATE, 0.01 );
init( TXN_STATE_SEND_AMOUNT, 4 );

1
fdbclient/ServerKnobs.h
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@ -374,6 +374,7 @@ public:
int MAX_COMMIT_UPDATES;
double MAX_PROXY_COMPUTE;
double MAX_COMPUTE_PER_OPERATION;
double MAX_COMPUTE_DURATION_LOG_CUTOFF;
int PROXY_COMPUTE_BUCKETS;
double PROXY_COMPUTE_GROWTH_RATE;
int TXN_STATE_SEND_AMOUNT;

13
fdbserver/CommitProxyServer.actor.cpp
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@ -708,6 +708,7 @@ ACTOR Future<Void> preresolutionProcessing(CommitBatchContext* self) {
// Pre-resolution the commits
TEST(pProxyCommitData->latestLocalCommitBatchResolving.get() < localBatchNumber - 1); // Wait for local batch
wait(pProxyCommitData->latestLocalCommitBatchResolving.whenAtLeast(localBatchNumber - 1));
pProxyCommitData->stats.computeLatency.addMeasurement(now() - timeStart);
double queuingDelay = g_network->now() - timeStart;
pProxyCommitData->stats.commitBatchQueuingDist->sampleSeconds(queuingDelay);
if ((queuingDelay > (double)SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS / SERVER_KNOBS->VERSIONS_PER_SECOND ||
@ -1401,6 +1402,18 @@ ACTOR Future<Void> postResolution(CommitBatchContext* self) {
pProxyCommitData->stats.minComputeNS =
std::min<int64_t>(pProxyCommitData->stats.minComputeNS,
1e9 * pProxyCommitData->commitComputePerOperation[self->latencyBucket]);
if (self->computeDuration >= SERVER_KNOBS->MAX_COMPUTE_DURATION_LOG_CUTOFF) {
TraceEvent(SevInfo, "LongComputeDuration")
.suppressFor(5.0)
.detail("ComputeDuration", self->computeDuration)
.detail("ComputePerOperation", computePerOperation)
.detail("LatencyBucket", self->latencyBucket)
.detail("UpdatedComputePerOperationEstimate",
pProxyCommitData->commitComputePerOperation[self->latencyBucket])
.detail("BatchBytes", self->batchBytes)
.detail("BatchOperations", self->batchOperations);
}
}
pProxyCommitData->stats.processingMutationDist->sampleSeconds(now() - postResolutionQueuing);

6
fdbserver/ProxyCommitData.actor.h
View File

@ -73,6 +73,8 @@ struct ProxyStats {
LatencySample commitBatchingWindowSize;
LatencySample computeLatency;
Future<Void> logger;
int64_t maxComputeNS;
@ -126,6 +128,10 @@ struct ProxyStats {
id,
SERVER_KNOBS->LATENCY_METRICS_LOGGING_INTERVAL,
SERVER_KNOBS->LATENCY_SAMPLE_SIZE),
computeLatency("ComputeLatency",
id,
SERVER_KNOBS->LATENCY_METRICS_LOGGING_INTERVAL,
SERVER_KNOBS->LATENCY_SAMPLE_SIZE),
maxComputeNS(0), minComputeNS(1e12),
commitBatchQueuingDist(Histogram::getHistogram(LiteralStringRef("CommitProxy"),
LiteralStringRef("CommitBatchQueuing"),