hydra-queue-runner: Limit concurrent database connections

Adding a 96-core aarch64 build machine to the build farm caused the potential number of database connections to increase a lot, so we started hitting the Postgres connection limit.
NixOS · Mar 21, 2017 · 57bc0ea · 57bc0ea
1 parent 150228d
commit 57bc0ea
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/hydra-queue-runner/hydra-queue-runner.cc b/src/hydra-queue-runner/hydra-queue-runner.cc
@@ -72,6 +72,7 @@ static uint64_t getMemSize()
 
 State::State()
     : config(std::make_unique<Config>())
+    , dbPool(config->getIntOption("max_db_connections", 128))
     , memoryTokens(config->getIntOption("nar_buffer_size", getMemSize() / 2))
     , maxOutputSize(config->getIntOption("max_output_size", 2ULL << 30))
     , uploadLogsToBinaryCache(config->getBoolOption("upload_logs_to_binary_cache", false))