Configuration

You can configure SpringQL in TOML format.

Default values are used if you don't set the key-value in TOML.

Here shows the default values and what they mean.

Default configuration values

[worker]
# Number of generic worker threads. Generic worker threads deal with internal and sink tasks.
# Setting this to > 1 may improve throughput but lead to out-of-order stream processing.
n_generic_worker_threads = 1

# Number of source worker threads. Source worker threads collect rows from foreign source.
# Too many number may may cause row fraud in runtime.
# Setting this to > 1 may improve throughput but lead to out-of-order stream processing.
n_source_worker_threads = 1

[memory]
# How much memory is allowed to be used in SpringQL streaming runtime.
upper_limit_bytes = 10_000_000

# Percentage over `upper_limit_bytes` to transit from Moderate state to Severe.
# In Severe state, internal scheduler is changed to exhibit memory-resilience.
moderate_to_severe_percent = 60

# Percentage over `upper_limit_bytes` to transit from Severe state to Critical.
# In Critical state, all intermediate rows are purged to release memory.
severe_to_critical_percent = 95

critical_to_severe_percent = 80
severe_to_moderate_percent = 40

# Interval for MemoryStateMachineWorker to publish TransitPerformanceMetricsSummary event.
memory_state_transition_interval_msec = 10

# Interval for PerformanceMonitorWorker to publish ReportMetricsSummary event.
performance_metrics_summary_report_interval_msec = 10

[web_console]
# Whether to enable POST API request to web console.
enable_report_post = false

report_interval_msec = 3_000

host = "127.0.0.1"
port = 8050

timeout_msec = 3_000

[source_reader]
net_connect_timeout_msec = 1_000
net_read_timeout_msec = 100

[sink_writer]
net_connect_timeout_msec = 1_000
net_write_timeout_msec = 100