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add storage server read concurrency knob

This commit is contained in:
Fuheng Zhao 2022-09-20 21:23:54 -07:00
parent 3c306cc558
commit 7002150188
3 changed files with 3 additions and 1 deletions
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1
fdbclient/ServerKnobs.cpp
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@ -778,6 +778,7 @@ void ServerKnobs::initialize(Randomize randomize, ClientKnobs* clientKnobs, IsSi
init( QUICK_GET_KEY_VALUES_LIMIT, 2000 );
init( QUICK_GET_KEY_VALUES_LIMIT_BYTES, 1e7 );
init( STORAGE_FEED_QUERY_HARD_LIMIT, 100000 );
init( STORAGE_SERVER_READ_CONCURRENCY, 70 );
// Priorities which each ReadType maps to, in enumeration order
init( STORAGESERVER_READ_RANKS, "0,2,1,1,1" );
init( STORAGESERVER_READ_PRIORITIES, "48,32,8" );

1
fdbclient/include/fdbclient/ServerKnobs.h
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@ -733,6 +733,7 @@ public:
int QUICK_GET_KEY_VALUES_LIMIT;
int QUICK_GET_KEY_VALUES_LIMIT_BYTES;
int STORAGE_FEED_QUERY_HARD_LIMIT;
int STORAGE_SERVER_READ_CONCURRENCY;
std::string STORAGESERVER_READ_RANKS;
std::string STORAGESERVER_READ_PRIORITIES;

2
fdbserver/storageserver.actor.cpp
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@ -1292,7 +1292,7 @@ public:
changeFeedDiskReadsLock(SERVER_KNOBS->CHANGE_FEED_DISK_READS_PARALLELISM),
fetchKeysBytesBudget(SERVER_KNOBS->STORAGE_FETCH_BYTES), fetchKeysBudgetUsed(false),
serveFetchCheckpointParallelismLock(SERVER_KNOBS->SERVE_FETCH_CHECKPOINT_PARALLELISM),
ssLock(FLOW_KNOBS->MAX_OUTSTANDING * 2, SERVER_KNOBS->STORAGESERVER_READ_PRIORITIES),
ssLock(SERVER_KNOBS->STORAGE_SERVER_READ_CONCURRENCY, SERVER_KNOBS->STORAGESERVER_READ_PRIORITIES),
instanceID(deterministicRandom()->randomUniqueID().first()), shuttingDown(false), behind(false),
versionBehind(false), debug_inApplyUpdate(false), debug_lastValidateTime(0), lastBytesInputEBrake(0),
lastDurableVersionEBrake(0), maxQueryQueue(0), transactionTagCounter(ssi.id()),