Fixed the poolsize to 4
Fixed the poolsize to 4


Former-commit-id: 2ba7d6a73a2181164f9d936f7aa0fcf2de0ca9ad [formerly 1412b30b18141cedc804684d39bc1d0e6e2b7120]
Former-commit-id: 95fc533e96d86ea08a73849522ba914c5c3d9db8
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine