Modules§
- cluster_
scheduling - Configuration for how cluster replicas are scheduled.
- grpc_
client - Configuration for gRPC client connections.
- upsert_
rocksdb - Tuning for RocksDB used by
UPSERTsources that takes effect on restart.
Macros§
- feature_
flags 🔒 - Macro to simplify creating feature flags, i.e. boolean flags that we use to toggle the availability of features.
Structs§
- VarDefinition
- Definition of a variable.
Enums§
- VarDefault
Value - The kinds of compiled in default values that can be used with
VarDefinition.
Constants§
- DEFAULT_
DATABASE_ NAME - The name of the default database that Materialize uses.
- IS_
SUPERUSER_ NAME - MZ_
VERSION_ NAME - SCHEMA_
ALIAS - SERVER_
MAJOR_ VERSION - The major version of PostgreSQL that Materialize claims to be.
- SERVER_
MINOR_ VERSION - The minor version of PostgreSQL that Materialize claims to be.
- SERVER_
PATCH_ VERSION - The patch version of PostgreSQL that Materialize claims to be.
- TRANSACTION_
ISOLATION_ VAR_ NAME
Statics§
- ALLOWED_
CLUSTER_ REPLICA_ SIZES - ALLOW_
REAL_ TIME_ RECENCY - ALLOW_
REAL_ 🔒TIME_ RECENCY_ VAR - APPLICATION_
NAME - AUTO_
ROUTE_ CATALOG_ QUERIES - CLIENT_
ENCODING - CLIENT_
MIN_ MESSAGES - CLUSTER
- CLUSTER_
REPLICA - COORD_
SLOW_ MESSAGE_ WARN_ THRESHOLD - CURRENT_
OBJECT_ MISSING_ WARNINGS - DATABASE
- DATE_
STYLE - DEFAULT_
CLUSTER_ REPLICATION_ FACTOR - EMIT_
INTROSPECTION_ QUERY_ NOTICE - EMIT_
PLAN_ INSIGHTS_ NOTICE - EMIT_
TIMESTAMP_ NOTICE - EMIT_
TRACE_ ID_ NOTICE - ENABLE_
ALTER_ SET_ CLUSTER - ENABLE_
ALTER_ 🔒SET_ CLUSTER_ VAR - ENABLE_
ALTER_ SWAP - ENABLE_
ALTER_ 🔒SWAP_ VAR - ENABLE_
ALTER_ TABLE_ ADD_ COLUMN - ENABLE_
ALTER_ 🔒TABLE_ ADD_ COLUMN_ VAR - ENABLE_
AWS_ MSK_ IAM_ AUTH - ENABLE_
AWS_ 🔒MSK_ IAM_ AUTH_ VAR - ENABLE_
BINARY_ DATE_ BIN - ENABLE_
BINARY_ 🔒DATE_ BIN_ VAR - ENABLE_
CARDINALITY_ ESTIMATES - ENABLE_
CARDINALITY_ 🔒ESTIMATES_ VAR - ENABLE_
CLOCK_ LOAD_ GENERATOR - ENABLE_
CLOCK_ 🔒LOAD_ GENERATOR_ VAR - ENABLE_
CLUSTER_ SCHEDULE_ REFRESH - ENABLE_
CLUSTER_ 🔒SCHEDULE_ REFRESH_ VAR - ENABLE_
COLLECTION_ PARTITION_ BY - ENABLE_
COLLECTION_ 🔒PARTITION_ BY_ VAR - ENABLE_
CONNECTION_ VALIDATION_ SYNTAX - ENABLE_
CONNECTION_ 🔒VALIDATION_ SYNTAX_ VAR - ENABLE_
CONSOLIDATE_ AFTER_ UNION_ NEGATE - ENABLE_
CONTINUAL_ TASK_ CREATE - ENABLE_
CONTINUAL_ 🔒TASK_ CREATE_ VAR - ENABLE_
CONTINUAL_ TASK_ RETAIN - ENABLE_
CONTINUAL_ 🔒TASK_ RETAIN_ VAR - ENABLE_
CONTINUAL_ TASK_ TRANSFORM - ENABLE_
CONTINUAL_ 🔒TASK_ TRANSFORM_ VAR - ENABLE_
COPY_ FROM_ REMOTE - ENABLE_
COPY_ 🔒FROM_ REMOTE_ VAR - ENABLE_
COPY_ TO_ EXPR - ENABLE_
COPY_ 🔒TO_ EXPR_ VAR - ENABLE_
CREATE_ TABLE_ FROM_ SOURCE - ENABLE_
CREATE_ 🔒TABLE_ FROM_ SOURCE_ VAR - ENABLE_
DATE_ BIN_ HOPPING - ENABLE_
DATE_ 🔒BIN_ HOPPING_ VAR - ENABLE_
DEFAULT_ CONNECTION_ VALIDATION - ENABLE_
DEQUADRATIC_ EQPROP_ MAP - ENABLE_
DEQUADRATIC_ 🔒EQPROP_ MAP_ VAR - ENABLE_
EAGER_ DELTA_ JOINS - ENABLE_
EAGER_ 🔒DELTA_ JOINS_ VAR - ENABLE_
ENVELOPE_ DEBEZIUM_ IN_ SUBSCRIBE - ENABLE_
ENVELOPE_ 🔒DEBEZIUM_ IN_ SUBSCRIBE_ VAR - ENABLE_
ENVELOPE_ MATERIALIZE - ENABLE_
ENVELOPE_ 🔒MATERIALIZE_ VAR - ENABLE_
ENVELOPE_ UPSERT_ INLINE_ ERRORS - ENABLE_
ENVELOPE_ 🔒UPSERT_ INLINE_ ERRORS_ VAR - ENABLE_
EQ_ CLASSES_ WITHHOLDING_ ERRORS - ENABLE_
EQ_ 🔒CLASSES_ WITHHOLDING_ ERRORS_ VAR - ENABLE_
EXPLAIN_ PUSHDOWN - ENABLE_
EXPLAIN_ 🔒PUSHDOWN_ VAR - ENABLE_
EXPRESSIONS_ IN_ LIMIT_ SYNTAX - ENABLE_
EXPRESSIONS_ 🔒IN_ LIMIT_ SYNTAX_ VAR - ENABLE_
FAST_ PATH_ PLAN_ INSIGHTS - ENABLE_
FAST_ 🔒PATH_ PLAN_ INSIGHTS_ VAR - ENABLE_
GUARD_ SUBQUERY_ TABLEFUNC - ENABLE_
GUARD_ 🔒SUBQUERY_ TABLEFUNC_ VAR - ENABLE_
INDEX_ OPTIONS - ENABLE_
INDEX_ 🔒OPTIONS_ VAR - ENABLE_
INTERNAL_ STATEMENT_ LOGGING - ENABLE_
JOIN_ PRIORITIZE_ ARRANGED - ENABLE_
JOIN_ 🔒PRIORITIZE_ ARRANGED_ VAR - ENABLE_
KAFKA_ SINK_ HEADERS - ENABLE_
KAFKA_ 🔒SINK_ HEADERS_ VAR - ENABLE_
LAUNCHDARKLY - Boolean flag indicating whether to enable syncing from LaunchDarkly. Can be turned off as an emergency measure to still be able to alter parameters while LD is broken.
- ENABLE_
LESS_ REDUCE_ IN_ EQPROP - ENABLE_
LESS_ 🔒REDUCE_ IN_ EQPROP_ VAR - ENABLE_
LETREC_ FIXPOINT_ ANALYSIS - ENABLE_
LETREC_ 🔒FIXPOINT_ ANALYSIS_ VAR - ENABLE_
LIST_ LENGTH_ MAX - ENABLE_
LIST_ 🔒LENGTH_ MAX_ VAR - ENABLE_
LIST_ N_ LAYERS - ENABLE_
LIST_ 🔒N_ LAYERS_ VAR - ENABLE_
LIST_ REMOVE - ENABLE_
LIST_ 🔒REMOVE_ VAR - ENABLE_
LOAD_ GENERATOR_ KEY_ VALUE - ENABLE_
LOAD_ 🔒GENERATOR_ KEY_ VALUE_ VAR - ENABLE_
LOGICAL_ COMPACTION_ WINDOW - ENABLE_
LOGICAL_ 🔒COMPACTION_ WINDOW_ VAR - ENABLE_
MANAGED_ CLUSTER_ AVAILABILITY_ ZONES - ENABLE_
MANAGED_ 🔒CLUSTER_ AVAILABILITY_ ZONES_ VAR - ENABLE_
MULTI_ WORKER_ STORAGE_ PERSIST_ SINK - ENABLE_
MULTI_ 🔒WORKER_ STORAGE_ PERSIST_ SINK_ VAR - ENABLE_
MZ_ NOTICES - ENABLE_
MZ_ 🔒NOTICES_ VAR - ENABLE_
NETWORK_ POLICIES - ENABLE_
NETWORK_ 🔒POLICIES_ VAR - ENABLE_
NEW_ OUTER_ JOIN_ LOWERING - ENABLE_
NEW_ 🔒OUTER_ JOIN_ LOWERING_ VAR - ENABLE_
NOTICES_ FOR_ INDEX_ ALREADY_ EXISTS - ENABLE_
NOTICES_ 🔒FOR_ INDEX_ ALREADY_ EXISTS_ VAR - ENABLE_
NOTICES_ FOR_ INDEX_ EMPTY_ KEY - ENABLE_
NOTICES_ 🔒FOR_ INDEX_ EMPTY_ KEY_ VAR - ENABLE_
NOTICES_ FOR_ INDEX_ TOO_ WIDE_ FOR_ LITERAL_ CONSTRAINTS - ENABLE_
NOTICES_ 🔒FOR_ INDEX_ TOO_ WIDE_ FOR_ LITERAL_ CONSTRAINTS_ VAR - ENABLE_
OFF_ THREAD_ OPTIMIZATION - ENABLE_
OFF_ 🔒THREAD_ OPTIMIZATION_ VAR - ENABLE_
PERSIST_ STREAMING_ COMPACTION - ENABLE_
PERSIST_ 🔒STREAMING_ COMPACTION_ VAR - ENABLE_
PERSIST_ STREAMING_ SNAPSHOT_ AND_ FETCH - ENABLE_
PERSIST_ 🔒STREAMING_ SNAPSHOT_ AND_ FETCH_ VAR - ENABLE_
PRIMARY_ KEY_ NOT_ ENFORCED - ENABLE_
PRIMARY_ 🔒KEY_ NOT_ ENFORCED_ VAR - ENABLE_
PROJECTION_ PUSHDOWN_ AFTER_ RELATION_ CSE - ENABLE_
PROJECTION_ 🔒PUSHDOWN_ AFTER_ RELATION_ CSE_ VAR - ENABLE_
RAISE_ STATEMENT - ENABLE_
RAISE_ 🔒STATEMENT_ VAR - ENABLE_
RBAC_ CHECKS - ENABLE_
REDACTED_ TEST_ OPTION - ENABLE_
REDACTED_ 🔒TEST_ OPTION_ VAR - ENABLE_
REDUCE_ MFP_ FUSION - ENABLE_
REDUCE_ 🔒MFP_ FUSION_ VAR - ENABLE_
REDUCE_ REDUCTION - ENABLE_
REFRESH_ EVERY_ MVS - ENABLE_
REFRESH_ 🔒EVERY_ MVS_ VAR - ENABLE_
REPEAT_ ROW - ENABLE_
REPEAT_ 🔒ROW_ VAR - ENABLE_
SESSION_ CARDINALITY_ ESTIMATES - ENABLE_
SESSION_ RBAC_ CHECKS - ENABLE_
SESSION_ TIMELINES - ENABLE_
SESSION_ 🔒TIMELINES_ VAR - ENABLE_
SQL_ SERVER_ SOURCE - ENABLE_
SQL_ 🔒SERVER_ SOURCE_ VAR - ENABLE_
STORAGE_ SHARD_ FINALIZATION - ENABLE_
TIME_ AT_ TIME_ ZONE - ENABLE_
TIME_ 🔒AT_ TIME_ ZONE_ VAR - ENABLE_
UNLIMITED_ RETAIN_ HISTORY - ENABLE_
UNLIMITED_ 🔒RETAIN_ HISTORY_ VAR - ENABLE_
VARIADIC_ LEFT_ JOIN_ LOWERING - ENABLE_
VARIADIC_ 🔒LEFT_ JOIN_ LOWERING_ VAR - ENABLE_
WITHIN_ TIMESTAMP_ ORDER_ BY_ IN_ SUBSCRIBE - ENABLE_
WITHIN_ 🔒TIMESTAMP_ ORDER_ BY_ IN_ SUBSCRIBE_ VAR - ENABLE_
WITH_ ORDINALITY_ LEGACY_ FALLBACK - ENABLE_
WITH_ 🔒ORDINALITY_ LEGACY_ FALLBACK_ VAR - ENABLE_
WORKER_ CORE_ AFFINITY - ENABLE_
WORKER_ 🔒CORE_ AFFINITY_ VAR - ENABLE_
ZERO_ DOWNTIME_ CLUSTER_ RECONFIGURATION - ENABLE_
ZERO_ 🔒DOWNTIME_ CLUSTER_ RECONFIGURATION_ VAR - EXTRA_
FLOAT_ DIGITS - FAILPOINTS
- FEATURE_
FLAGS - FORCE_
SOURCE_ TABLE_ SYNTAX - IDLE_
IN_ TRANSACTION_ SESSION_ TIMEOUT - INTEGER_
DATETIMES - INTERVAL_
STYLE - KAFKA_
FETCH_ METADATA_ TIMEOUT - Controls the timeout when fetching kafka metadata. Defaults to 10s.
- KAFKA_
PROGRESS_ RECORD_ FETCH_ TIMEOUT - Controls the timeout when fetching kafka progress records. Defaults to 60s.
- KAFKA_
SOCKET_ CONNECTION_ SETUP_ TIMEOUT - Controls
socket.connection.setup.timeout.msfor rdkafka client connections. Defaults to the rdkafka default (30000ms). Cannot be greater thani32::MAXor less than 1000ms - KAFKA_
SOCKET_ KEEPALIVE - Enables
socket.keepalive.enablefor rdkafka client connections. Defaults to true. - KAFKA_
SOCKET_ TIMEOUT - Controls
socket.timeout.msfor rdkafka client connections. Defaults to the rdkafka default (60000ms). Cannot be greater than 300000ms, more than 100ms greater thankafka_transaction_timeout, or less than 10ms. - KAFKA_
TRANSACTION_ TIMEOUT - Controls
transaction.timeout.msfor rdkafka client connections. Defaults to the rdkafka default (60000ms). Cannot be greater thani32::MAXor less than 1000ms. - KEEP_
N_ PRIVATELINK_ STATUS_ HISTORY_ ENTRIES - Controls
mz_storage_types::parameters::StorageParameters::keep_n_privatelink_status_history_entries. - KEEP_
N_ SINK_ STATUS_ HISTORY_ ENTRIES - Controls
mz_storage_types::parameters::StorageParameters::keep_n_sink_status_history_entries. - KEEP_
N_ SOURCE_ STATUS_ HISTORY_ ENTRIES - Controls
mz_storage_types::parameters::StorageParameters::keep_n_source_status_history_entries. - LOGGING_
FILTER - LOGGING_
FILTER_ DEFAULTS - MAX_
AWS_ PRIVATELINK_ CONNECTIONS - MAX_
CLUSTERS - MAX_
CONNECTIONS - MAX_
CONTINUAL_ TASKS - MAX_
COPY_ FROM_ SIZE - MAX_
CREDIT_ CONSUMPTION_ RATE - MAX_
DATABASES - MAX_
IDENTIFIER_ LENGTH - MAX_
KAFKA_ CONNECTIONS - MAX_
MATERIALIZED_ VIEWS - MAX_
MYSQL_ CONNECTIONS - MAX_
NETWORK_ POLICIES - MAX_
OBJECTS_ PER_ SCHEMA - MAX_
POSTGRES_ CONNECTIONS - MAX_
QUERY_ RESULT_ SIZE - MAX_
REPLICAS_ PER_ CLUSTER - MAX_
RESULT_ SIZE - MAX_
ROLES - MAX_
RULES_ PER_ NETWORK_ POLICY - MAX_
SCHEMAS_ PER_ DATABASE - MAX_
SECRETS - MAX_
SINKS - MAX_
SOURCES - MAX_
SQL_ SERVER_ CONNECTIONS - MAX_
TABLES - MAX_
TIMESTAMP_ INTERVAL - METRICS_
RETENTION - The logical compaction window for builtin tables and sources that have the
retained_metrics_relationflag set. - MIN_
TIMESTAMP_ INTERVAL - MYSQL_
SOURCE_ CONNECT_ TIMEOUT - Sets the timeout for establishing an authenticated connection to MySQL
- MYSQL_
SOURCE_ SNAPSHOT_ LOCK_ WAIT_ TIMEOUT - Sets the
lock_wait_timeoutvalue to use during the snapshotting phase of MySQL sources. - MYSQL_
SOURCE_ SNAPSHOT_ MAX_ EXECUTION_ TIME - Sets the
max_execution_timevalue to use during the snapshotting phase of MySQL sources. - MYSQL_
SOURCE_ TCP_ KEEPALIVE - Sets the time between TCP keepalive probes when connecting to MySQL via
mz_mysql_util. - NETWORK_
POLICY - OPENTELEMETRY_
FILTER - OPENTELEMETRY_
FILTER_ DEFAULTS - OPTIMIZER_
E2E_ LATENCY_ WARNING_ THRESHOLD - OPTIMIZER_
ONESHOT_ STATS_ TIMEOUT - OPTIMIZER_
STATS_ TIMEOUT - PERSIST_
FAST_ PATH_ LIMIT - PG_
SOURCE_ CONNECT_ TIMEOUT - Controls the connect_timeout setting when connecting to PG via
mz_postgres_util. - PG_
SOURCE_ SNAPSHOT_ COLLECT_ STRICT_ COUNT - Please see
PgSourceSnapshotConfig. - PG_
SOURCE_ SNAPSHOT_ STATEMENT_ TIMEOUT - Sets the
statement_timeoutvalue to use during the snapshotting phase of PG sources. - PG_
SOURCE_ TCP_ CONFIGURE_ SERVER - Sets whether to apply the TCP configuration parameters on the server when
connecting to PG via
mz_postgres_util. - PG_
SOURCE_ TCP_ KEEPALIVES_ IDLE - Sets the amount of idle time before a keepalive packet is sent on the connection when connecting
to PG via
mz_postgres_util. - PG_
SOURCE_ TCP_ KEEPALIVES_ INTERVAL - Sets the time interval between TCP keepalive probes when connecting to PG via
mz_postgres_util. - PG_
SOURCE_ TCP_ KEEPALIVES_ RETRIES - Sets the maximum number of TCP keepalive probes that will be sent before dropping a connection
when connecting to PG via
mz_postgres_util. - PG_
SOURCE_ TCP_ USER_ TIMEOUT - Sets the TCP user timeout when connecting to PG via
mz_postgres_util. - PG_
SOURCE_ WAL_ SENDER_ TIMEOUT - Sets the
wal_sender_timeoutvalue to use during the replication phase of PG sources. - PG_
TIMESTAMP_ ORACLE_ CONNECTION_ POOL_ MAX_ SIZE - Controls
mz_adapter::coord::timestamp_oracle::postgres_oracle::DynamicConfig::pg_connection_pool_max_size. - PG_
TIMESTAMP_ ORACLE_ CONNECTION_ POOL_ MAX_ WAIT - Controls
mz_adapter::coord::timestamp_oracle::postgres_oracle::DynamicConfig::pg_connection_pool_max_wait. - PG_
TIMESTAMP_ ORACLE_ CONNECTION_ POOL_ TTL - Controls
mz_adapter::coord::timestamp_oracle::postgres_oracle::DynamicConfig::pg_connection_pool_ttl. - PG_
TIMESTAMP_ ORACLE_ CONNECTION_ POOL_ TTL_ STAGGER - Controls
mz_adapter::coord::timestamp_oracle::postgres_oracle::DynamicConfig::pg_connection_pool_ttl_stagger. - PRIVATELINK_
STATUS_ UPDATE_ QUOTA_ PER_ MINUTE - REAL_
TIME_ RECENCY - Feature flag indicating whether real time recency is enabled. Not that unlike other feature flags, this is made available at the session level, so is additionally gated by a feature flag.
- REAL_
TIME_ RECENCY_ TIMEOUT - REPLICA_
STATUS_ HISTORY_ RETENTION_ WINDOW - Controls
mz_storage_types::parameters::StorageParameters::replica_status_history_retention_window. - SEARCH_
PATH - SENTRY_
FILTERS - SERVER_
VERSION - SERVER_
VERSION_ NUM - SQL_
SAFE_ UPDATES - SSH_
CHECK_ INTERVAL - Controls the check interval for connections to SSH bastions via
mz_ssh_util. - SSH_
CONNECT_ TIMEOUT - Controls the connect timeout for connections to SSH bastions via
mz_ssh_util. - SSH_
KEEPALIVES_ IDLE - Controls the keepalive idle interval for connections to SSH bastions via
mz_ssh_util. - STANDARD_
CONFORMING_ STRINGS - STATEMENT_
LOGGING_ DEFAULT_ SAMPLE_ RATE - STATEMENT_
LOGGING_ MAX_ DATA_ CREDIT - STATEMENT_
LOGGING_ MAX_ SAMPLE_ RATE - STATEMENT_
LOGGING_ SAMPLE_ RATE - STATEMENT_
LOGGING_ TARGET_ DATA_ RATE - STATEMENT_
LOGGING_ USE_ REPRODUCIBLE_ RNG - STATEMENT_
LOGGING_ 🔒USE_ REPRODUCIBLE_ RNG_ VAR - STATEMENT_
TIMEOUT - STORAGE_
DATAFLOW_ MAX_ INFLIGHT_ BYTES - The maximum number of in-flight bytes emitted by persist_sources feeding storage
dataflows.
Currently defaults to 256MiB = 268435456 bytes
Note: Backpressure will only be turned on if disk is enabled based on
storage_dataflow_max_inflight_bytes_disk_onlyflag - STORAGE_
DATAFLOW_ MAX_ INFLIGHT_ BYTES_ DISK_ ONLY - STORAGE_
DATAFLOW_ MAX_ INFLIGHT_ BYTES_ TO_ CLUSTER_ SIZE_ FRACTION - The fraction of the cluster replica size to be used as the maximum number of in-flight bytes emitted by persist_sources feeding storage dataflows. If not configured, the storage_dataflow_max_inflight_bytes value will be used. For this value to be used storage_dataflow_max_inflight_bytes needs to be set.
- STORAGE_
RECORD_ SOURCE_ SINK_ NAMESPACED_ ERRORS - STORAGE_
SHRINK_ UPSERT_ UNUSED_ BUFFERS_ BY_ RATIO - Configuration ratio to shrink unusef buffers in upsert by. For eg: is 2 is set, then the buffers will be reduced by 2 i.e. halved. Default is 0, which means shrinking is disabled.
- STORAGE_
STATISTICS_ COLLECTION_ INTERVAL - The interval to collect statistics for
mz_source_statistics_per_workerandmz_sink_statistics_per_workerin clusterd. Controls the accuracy of metrics. - STORAGE_
STATISTICS_ INTERVAL - The interval to submit statistics to
mz_source_statistics_per_workerandmz_sink_statistics_per_worker. - SUPERUSER_
RESERVED_ CONNECTIONS - TIMEZONE
- TRANSACTION_
ISOLATION - UNSAFE_
ENABLE_ TABLE_ CHECK_ CONSTRAINT - UNSAFE_
ENABLE_ 🔒TABLE_ CHECK_ CONSTRAINT_ VAR - UNSAFE_
ENABLE_ TABLE_ FOREIGN_ KEY - UNSAFE_
ENABLE_ 🔒TABLE_ FOREIGN_ KEY_ VAR - UNSAFE_
ENABLE_ TABLE_ KEYS - UNSAFE_
ENABLE_ 🔒TABLE_ KEYS_ VAR - UNSAFE_
ENABLE_ UNORCHESTRATED_ CLUSTER_ REPLICAS - UNSAFE_
ENABLE_ 🔒UNORCHESTRATED_ CLUSTER_ REPLICAS_ VAR - UNSAFE_
ENABLE_ UNSAFE_ FUNCTIONS - UNSAFE_
ENABLE_ 🔒UNSAFE_ FUNCTIONS_ VAR - UNSAFE_
ENABLE_ UNSTABLE_ DEPENDENCIES - UNSAFE_
ENABLE_ 🔒UNSTABLE_ DEPENDENCIES_ VAR - UNSAFE_
MOCK_ AUDIT_ EVENT_ TIMESTAMP - UNSAFE_
NEW_ TRANSACTION_ WALL_ TIME - USER_
STORAGE_ MANAGED_ COLLECTIONS_ BATCH_ DURATION - WEBHOOKS_
SECRETS_ CACHING_ TTL_ SECS - WEBHOOK_
CONCURRENT_ REQUEST_ LIMIT - WELCOME_
MESSAGE