greptimedb/config/standalone.example.toml

## The default timezone of the server.
## @toml2docs:none-default
default_timezone = "UTC"

## The default column prefix for auto-created time index and value columns.
## @toml2docs:none-default
default_column_prefix = "greptime"

## The user provider for authentication.
## Examples: "static_user_provider:file:/path/to/users", "static_user_provider:cmd:greptime_user=greptime_pwd"
## @toml2docs:none-default
#+ user_provider = "static_user_provider:file:/path/to/users"

## Maximum total memory for all concurrent write request bodies and messages (HTTP, gRPC, Flight).
## Set to 0 to disable the limit. Default: "0" (unlimited)
## @toml2docs:none-default
#+ max_in_flight_write_bytes = "1GB"

## Policy when write bytes quota is exhausted.
## Options: "wait" (default, 10s timeout), "wait(<duration>)" (e.g., "wait(30s)"), "fail"
## @toml2docs:none-default
#+ write_bytes_exhausted_policy = "wait"

## Initialize all regions in the background during the startup.
## By default, it provides services after all regions have been initialized.
init_regions_in_background = false

## Parallelism of initializing regions.
init_regions_parallelism = 16

## The maximum concurrent queries allowed to be executed. Zero means unlimited.
max_concurrent_queries = 0

## Enable telemetry to collect anonymous usage data. Enabled by default.
#+ enable_telemetry = true

## The runtime options.
#+ [runtime]
## The number of threads to execute the runtime for global read operations.
#+ global_rt_size = 8
## The number of threads to execute the runtime for global write operations.
#+ compact_rt_size = 4

## The HTTP server options.
[http]
## The address to bind the HTTP server.
addr = "127.0.0.1:4000"
## HTTP request timeout. Set to 0 to disable timeout.
timeout = "0s"
## HTTP request body limit.
## The following units are supported: `B`, `KB`, `KiB`, `MB`, `MiB`, `GB`, `GiB`, `TB`, `TiB`, `PB`, `PiB`.
## Set to 0 to disable limit.
body_limit = "64MB"
## HTTP CORS support, it's turned on by default
## This allows browser to access http APIs without CORS restrictions
enable_cors = true
## Customize allowed origins for HTTP CORS.
## @toml2docs:none-default
cors_allowed_origins = ["https://example.com"]

## Whether to enable validation for Prometheus remote write requests.
## Available options:
## - strict: deny invalid UTF-8 strings (default).
## - lossy: allow invalid UTF-8 strings, replace invalid characters with REPLACEMENT_CHARACTER(U+FFFD).
## - unchecked: do not valid strings.
prom_validation_mode = "strict"

## The gRPC server options.
[grpc]
## The address to bind the gRPC server.
bind_addr = "127.0.0.1:4001"
## The number of server worker threads.
runtime_size = 8
## The maximum connection age for gRPC connection.
## The value can be a human-readable time string. For example: `10m` for ten minutes or `1h` for one hour.
## Refer to https://grpc.io/docs/guides/keepalive/ for more details.
## @toml2docs:none-default
#+ max_connection_age = "10m"

## gRPC server TLS options, see `mysql.tls` section.
[grpc.tls]
## TLS mode.
mode = "disable"

## Certificate file path.
## @toml2docs:none-default
cert_path = ""

## Private key file path.
## @toml2docs:none-default
key_path = ""

## Watch for Certificate and key file change and auto reload.
## For now, gRPC tls config does not support auto reload.
watch = false

## MySQL server options.
[mysql]
## Whether to enable.
enable = true
## The addr to bind the MySQL server.
addr = "127.0.0.1:4002"
## The number of server worker threads.
runtime_size = 2
## Server-side keep-alive time.
## Set to 0 (default) to disable.
keep_alive = "0s"
## Maximum entries in the MySQL prepared statement cache; default is 10,000.
prepared_stmt_cache_size= 10000
# MySQL server TLS options.
[mysql.tls]

## TLS mode, refer to https://www.postgresql.org/docs/current/libpq-ssl.html
## - `disable` (default value)
## - `prefer`
## - `require`
## - `verify-ca`
## - `verify-full`
mode = "disable"

## Certificate file path.
## @toml2docs:none-default
cert_path = ""

## Private key file path.
## @toml2docs:none-default
key_path = ""

## Watch for Certificate and key file change and auto reload
watch = false

## PostgresSQL server options.
[postgres]
## Whether to enable
enable = true
## The addr to bind the PostgresSQL server.
addr = "127.0.0.1:4003"
## The number of server worker threads.
runtime_size = 2
## Server-side keep-alive time.
## Set to 0 (default) to disable.
keep_alive = "0s"

## PostgresSQL server TLS options, see `mysql.tls` section.
[postgres.tls]
## TLS mode.
mode = "disable"

## Certificate file path.
## @toml2docs:none-default
cert_path = ""

## Private key file path.
## @toml2docs:none-default
key_path = ""

## Watch for Certificate and key file change and auto reload
watch = false

## OpenTSDB protocol options.
[opentsdb]
## Whether to enable OpenTSDB put in HTTP API.
enable = true

## InfluxDB protocol options.
[influxdb]
## Whether to enable InfluxDB protocol in HTTP API.
enable = true

## Jaeger protocol options.
[jaeger]
## Whether to enable Jaeger protocol in HTTP API.
enable = true

## Prometheus remote storage options
[prom_store]
## Whether to enable Prometheus remote write and read in HTTP API.
enable = true
## Whether to store the data from Prometheus remote write in metric engine.
with_metric_engine = true
## Interval to flush pending rows batcher.
## Set to "0s" to disable batching mode in Prometheus Remote Write endpoint
#+pending_rows_flush_interval = "0s"
## Max rows per pending batch before triggering a flush.
#+max_batch_rows = 100000
## Max number of concurrent batch flushes.
#+max_concurrent_flushes = 256
## Capacity of the pending batch worker channel.
#+worker_channel_capacity = 65526
## Max inflight write requests before backpressure.
#+max_inflight_requests = 3000

## The WAL options.
[wal]
## The provider of the WAL.
## - `raft_engine`: the wal is stored in the local file system by raft-engine.
## - `kafka`: it's remote wal that data is stored in Kafka.
provider = "raft_engine"

## The directory to store the WAL files.
## **It's only used when the provider is `raft_engine`**.
## @toml2docs:none-default
dir = "./greptimedb_data/wal"

## The size of the WAL segment file.
## **It's only used when the provider is `raft_engine`**.
file_size = "128MB"

## The threshold of the WAL size to trigger a purge.
## **It's only used when the provider is `raft_engine`**.
purge_threshold = "1GB"

## The interval to trigger a purge.
## **It's only used when the provider is `raft_engine`**.
purge_interval = "1m"

## The read batch size.
## **It's only used when the provider is `raft_engine`**.
read_batch_size = 128

## Whether to use sync write.
## **It's only used when the provider is `raft_engine`**.
sync_write = false

## Whether to reuse logically truncated log files.
## **It's only used when the provider is `raft_engine`**.
enable_log_recycle = true

## Whether to pre-create log files on start up.
## **It's only used when the provider is `raft_engine`**.
prefill_log_files = false

## Duration for fsyncing log files.
## **It's only used when the provider is `raft_engine`**.
sync_period = "10s"

## Parallelism during WAL recovery.
recovery_parallelism = 2

## The Kafka broker endpoints.
## **It's only used when the provider is `kafka`**.
broker_endpoints = ["127.0.0.1:9092"]

## The connect timeout for kafka client.
## **It's only used when the provider is `kafka`**.
#+ connect_timeout = "3s"

## The timeout for kafka client.
## **It's only used when the provider is `kafka`**.
#+ timeout = "3s"

## Automatically create topics for WAL.
## Set to `true` to automatically create topics for WAL.
## Otherwise, use topics named `topic_name_prefix_[0..num_topics)`
auto_create_topics = true

## Number of topics.
## **It's only used when the provider is `kafka`**.
num_topics = 64

## Topic selector type.
## Available selector types:
## - `round_robin` (default)
## **It's only used when the provider is `kafka`**.
selector_type = "round_robin"

## A Kafka topic is constructed by concatenating `topic_name_prefix` and `topic_id`.
## i.g., greptimedb_wal_topic_0, greptimedb_wal_topic_1.
## **It's only used when the provider is `kafka`**.
topic_name_prefix = "greptimedb_wal_topic"

## Expected number of replicas of each partition.
## **It's only used when the provider is `kafka`**.
replication_factor = 1

## Above which a topic creation operation will be cancelled.
## **It's only used when the provider is `kafka`**.
create_topic_timeout = "30s"

## The max size of a single producer batch.
## Warning: Kafka has a default limit of 1MB per message in a topic.
## **It's only used when the provider is `kafka`**.
max_batch_bytes = "1MB"

## The consumer wait timeout.
## **It's only used when the provider is `kafka`**.
consumer_wait_timeout = "100ms"

## Ignore missing entries during read WAL.
## **It's only used when the provider is `kafka`**.
##
## This option ensures that when Kafka messages are deleted, the system
## can still successfully replay memtable data without throwing an
## out-of-range error.
## However, enabling this option might lead to unexpected data loss,
## as the system will skip over missing entries instead of treating
## them as critical errors.
overwrite_entry_start_id = false

# The Kafka SASL configuration.
# **It's only used when the provider is `kafka`**.
# Available SASL mechanisms:
# - `PLAIN`
# - `SCRAM-SHA-256`
# - `SCRAM-SHA-512`
# [wal.sasl]
# type = "SCRAM-SHA-512"
# username = "user_kafka"
# password = "secret"

# The Kafka TLS configuration.
# **It's only used when the provider is `kafka`**.
# [wal.tls]
# server_ca_cert_path = "/path/to/server_cert"
# client_cert_path = "/path/to/client_cert"
# client_key_path = "/path/to/key"

## Metadata storage options.
[metadata_store]
## The size of the metadata store log file.
file_size = "64MB"
## The threshold of the metadata store size to trigger a purge.
purge_threshold = "256MB"
## The interval of the metadata store to trigger a purge.
purge_interval = "1m"

## Procedure storage options.
[procedure]
## Procedure max retry time.
max_retry_times = 3
## Initial retry delay of procedures, increases exponentially
retry_delay = "500ms"
## Max running procedures.
## The maximum number of procedures that can be running at the same time.
## If the number of running procedures exceeds this limit, the procedure will be rejected.
max_running_procedures = 128

## flow engine options.
[flow]
## The number of flow worker in flownode.
## Not setting(or set to 0) this value will use the number of CPU cores divided by 2.
#+num_workers=0

# Example of using S3 as the storage.
# [storage]
# type = "S3"
# bucket = "greptimedb"
# root = "data"
# access_key_id = "test"
# secret_access_key = "123456"
# endpoint = "https://s3.amazonaws.com"
# region = "us-west-2"
# enable_virtual_host_style = false
# disable_ec2_metadata = false

# Example of using Oss as the storage.
# [storage]
# type = "Oss"
# bucket = "greptimedb"
# root = "data"
# access_key_id = "test"
# access_key_secret = "123456"
# endpoint = "https://oss-cn-hangzhou.aliyuncs.com"

# Example of using Azblob as the storage.
# [storage]
# type = "Azblob"
# container = "greptimedb"
# root = "data"
# account_name = "test"
# account_key = "123456"
# endpoint = "https://greptimedb.blob.core.windows.net"
# sas_token = ""

# Example of using Gcs as the storage.
# [storage]
# type = "Gcs"
# bucket = "greptimedb"
# root = "data"
# scope = "test"
# credential_path = "123456"
# credential = "base64-credential"
# endpoint = "https://storage.googleapis.com"

## The query engine options.
[query]
## Parallelism of the query engine.
## Default to 0, which means the number of CPU cores.
parallelism = 0

## Memory pool size for query execution operators (aggregation, sorting, join).
## Supports absolute size (e.g., "2GB", "4GB") or percentage of system memory (e.g., "20%").
## Setting it to 0 disables the limit (unbounded, default behavior).
## When this limit is reached, queries will fail with ResourceExhausted error.
## NOTE: This does NOT limit memory used by table scans.
memory_pool_size = "50%"

## The data storage options.
[storage]
## The working home directory.
data_home = "./greptimedb_data"

## The storage type used to store the data.
## - `File`: the data is stored in the local file system.
## - `S3`: the data is stored in the S3 object storage.
## - `Gcs`: the data is stored in the Google Cloud Storage.
## - `Azblob`: the data is stored in the Azure Blob Storage.
## - `Oss`: the data is stored in the Aliyun OSS.
type = "File"

## The S3 bucket name.
## **It's only used when the storage type is `S3`, `Oss` and `Gcs`**.
## @toml2docs:none-default
bucket = "greptimedb"

## The S3 data will be stored in the specified prefix, for example, `s3://${bucket}/${root}`.
## **It's only used when the storage type is `S3`, `Oss` and `Azblob`**.
## @toml2docs:none-default
root = "greptimedb"

## The access key id of the aws account.
## It's **highly recommended** to use AWS IAM roles instead of hardcoding the access key id and secret key.
## **It's only used when the storage type is `S3` and `Oss`**.
## @toml2docs:none-default
access_key_id = "test"

## The secret access key of the aws account.
## It's **highly recommended** to use AWS IAM roles instead of hardcoding the access key id and secret key.
## **It's only used when the storage type is `S3`**.
## @toml2docs:none-default
secret_access_key = "test"

## The secret access key of the aliyun account.
## **It's only used when the storage type is `Oss`**.
## @toml2docs:none-default
access_key_secret = "test"

## The account key of the azure account.
## **It's only used when the storage type is `Azblob`**.
## @toml2docs:none-default
account_name = "test"

## The account key of the azure account.
## **It's only used when the storage type is `Azblob`**.
## @toml2docs:none-default
account_key = "test"

## The scope of the google cloud storage.
## **It's only used when the storage type is `Gcs`**.
## @toml2docs:none-default
scope = "test"

## The credential path of the google cloud storage.
## **It's only used when the storage type is `Gcs`**.
## @toml2docs:none-default
credential_path = "test"

## The credential of the google cloud storage.
## **It's only used when the storage type is `Gcs`**.
## @toml2docs:none-default
credential = "base64-credential"

## The container of the azure account.
## **It's only used when the storage type is `Azblob`**.
## @toml2docs:none-default
container = "greptimedb"

## The sas token of the azure account.
## **It's only used when the storage type is `Azblob`**.
## @toml2docs:none-default
sas_token = ""

## The endpoint of the S3 service.
## **It's only used when the storage type is `S3`, `Oss`, `Gcs` and `Azblob`**.
## @toml2docs:none-default
endpoint = "https://s3.amazonaws.com"

## The region of the S3 service.
## **It's only used when the storage type is `S3`, `Oss`, `Gcs` and `Azblob`**.
## @toml2docs:none-default
region = "us-west-2"

## The http client options to the storage.
## **It's only used when the storage type is `S3`, `Oss`, `Gcs` and `Azblob`**.
[storage.http_client]

## The maximum idle connection per host allowed in the pool.
pool_max_idle_per_host = 1024

## The timeout for only the connect phase of a http client.
connect_timeout = "30s"

## The total request timeout, applied from when the request starts connecting until the response body has finished.
## Also considered a total deadline.
timeout = "30s"

## The timeout for idle sockets being kept-alive.
pool_idle_timeout = "90s"

## To skip the ssl verification
## **Security Notice**: Setting `skip_ssl_validation = true` disables certificate verification, making connections vulnerable to man-in-the-middle attacks. Only use this in development or trusted private networks.
skip_ssl_validation = false

# Custom storage options
# [[storage.providers]]
# name = "S3"
# type = "S3"
# bucket = "greptimedb"
# root = "data"
# access_key_id = "test"
# secret_access_key = "123456"
# endpoint = "https://s3.amazonaws.com"
# region = "us-west-2"
# [[storage.providers]]
# name = "Gcs"
# type = "Gcs"
# bucket = "greptimedb"
# root = "data"
# scope = "test"
# credential_path = "123456"
# credential = "base64-credential"
# endpoint = "https://storage.googleapis.com"

## The region engine options. You can configure multiple region engines.
[[region_engine]]

## The Mito engine options.
[region_engine.mito]

## Number of region workers.
#+ num_workers = 8

## Request channel size of each worker.
worker_channel_size = 128

## Max batch size for a worker to handle requests.
worker_request_batch_size = 64

## Number of meta action updated to trigger a new checkpoint for the manifest.
manifest_checkpoint_distance = 10

## Whether to compress manifest and checkpoint file by gzip (default false).
compress_manifest = false

## Max number of running background flush jobs (default: 1/2 of cpu cores).
## @toml2docs:none-default="Auto"
#+ max_background_flushes = 4

## Max number of running background compaction jobs (default: 1/4 of cpu cores).
## @toml2docs:none-default="Auto"
#+ max_background_compactions = 2

## Max number of running background purge jobs (default: number of cpu cores).
## @toml2docs:none-default="Auto"
#+ max_background_purges = 8

## Memory budget for compaction tasks.
## Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").
## Setting it to 0 or "unlimited" disables the limit.
## @toml2docs:none-default="0"
#+ experimental_compaction_memory_limit = "0"

## Behavior when compaction cannot acquire memory from the budget.
## Options: "wait" (default, 10s), "wait(<duration>)", "fail"
## @toml2docs:none-default="wait"
#+ experimental_compaction_on_exhausted = "wait"

## Interval to auto flush a region if it has not flushed yet.
auto_flush_interval = "1h"

## Global write buffer size for all regions. If not set, it's default to 1/8 of OS memory with a max limitation of 1GB.
## @toml2docs:none-default="Auto"
#+ global_write_buffer_size = "1GB"

## Global write buffer size threshold to reject write requests. If not set, it's default to 2 times of `global_write_buffer_size`.
## @toml2docs:none-default="Auto"
#+ global_write_buffer_reject_size = "2GB"

## Cache size for SST metadata. Setting it to 0 to disable the cache.
## If not set, it's default to 1/32 of OS memory with a max limitation of 128MB.
## @toml2docs:none-default="Auto"
#+ sst_meta_cache_size = "128MB"

## Cache size for vectors and arrow arrays. Setting it to 0 to disable the cache.
## If not set, it's default to 1/16 of OS memory with a max limitation of 512MB.
## @toml2docs:none-default="Auto"
#+ vector_cache_size = "512MB"

## Cache size for pages of SST row groups. Setting it to 0 to disable the cache.
## If not set, it's default to 1/8 of OS memory.
## @toml2docs:none-default="Auto"
#+ page_cache_size = "512MB"

## Cache size for time series selector (e.g. `last_value()`). Setting it to 0 to disable the cache.
## If not set, it's default to 1/16 of OS memory with a max limitation of 512MB.
## @toml2docs:none-default="Auto"
#+ selector_result_cache_size = "512MB"

## Whether to enable the write cache, it's enabled by default when using object storage. It is recommended to enable it when using object storage for better performance.
enable_write_cache = false

## File system path for write cache, defaults to `{data_home}`.
write_cache_path = ""

## Capacity for write cache. If your disk space is sufficient, it is recommended to set it larger.
write_cache_size = "5GiB"

## TTL for write cache.
## @toml2docs:none-default
write_cache_ttl = "8h"

## Preload index (puffin) files into cache on region open (default: true).
## When enabled, index files are loaded into the write cache during region initialization,
## which can improve query performance at the cost of longer startup times.
preload_index_cache = true

## Percentage of write cache capacity allocated for index (puffin) files (default: 20).
## The remaining capacity is used for data (parquet) files.
## Must be between 0 and 100 (exclusive). For example, with a 5GiB write cache and 20% allocation,
## 1GiB is reserved for index files and 4GiB for data files.
index_cache_percent = 20

## Enable refilling cache on read operations (default: true).
## When disabled, cache refilling on read won't happen.
enable_refill_cache_on_read = true

## Capacity for manifest cache (default: 256MB).
manifest_cache_size = "256MB"

## Buffer size for SST writing.
sst_write_buffer_size = "8MB"

## Maximum number of SST files to scan concurrently.
max_concurrent_scan_files = 384

## Whether to allow stale WAL entries read during replay.
allow_stale_entries = false

## Memory limit for table scans across all queries.
## Supports absolute size (e.g., "2GB") or percentage of system memory (e.g., "20%").
## Setting it to 0 disables the limit.
scan_memory_limit = "50%"
## Controls what happens when a scan cannot get memory immediately.
## "fail" (default) fails fast and is the recommended option for most users.
## "wait" / "wait(<duration>)" waits for memory to become available. This is mainly
## for advanced tuning in bursty workloads where temporary contention is common and
## higher latency is acceptable.
## "wait" means "wait(10s)", not unlimited waiting.
scan_memory_on_exhausted = "fail"

## Minimum time interval between two compactions.
## To align with the old behavior, the default value is 0 (no restrictions).
min_compaction_interval = "0m"

## Whether to enable flat format as the default SST format.
default_flat_format = true

## The options for index in Mito engine.
[region_engine.mito.index]

## Auxiliary directory path for the index in filesystem, used to store intermediate files for
## creating the index and staging files for searching the index, defaults to `{data_home}/index_intermediate`.
## The default name for this directory is `index_intermediate` for backward compatibility.
##
## This path contains two subdirectories:
## - `__intm`: for storing intermediate files used during creating index.
## - `staging`: for storing staging files used during searching index.
aux_path = ""

## The max capacity of the staging directory.
staging_size = "2GB"

## The TTL of the staging directory.
## Defaults to 7 days.
## Setting it to "0s" to disable TTL.
staging_ttl = "7d"

## Cache size for inverted index metadata.
metadata_cache_size = "64MiB"

## Cache size for inverted index content.
content_cache_size = "128MiB"

## Page size for inverted index content cache.
content_cache_page_size = "64KiB"

## Cache size for index result.
result_cache_size = "128MiB"

## The options for inverted index in Mito engine.
[region_engine.mito.inverted_index]

## Whether to create the index on flush.
## - `auto`: automatically (default)
## - `disable`: never
create_on_flush = "auto"

## Whether to create the index on compaction.
## - `auto`: automatically (default)
## - `disable`: never
create_on_compaction = "auto"

## Whether to apply the index on query
## - `auto`: automatically (default)
## - `disable`: never
apply_on_query = "auto"

## Memory threshold for performing an external sort during index creation.
## - `auto`: automatically determine the threshold based on the system memory size (default)
## - `unlimited`: no memory limit
## - `[size]` e.g. `64MB`: fixed memory threshold
mem_threshold_on_create = "auto"

## Deprecated, use `region_engine.mito.index.aux_path` instead.
intermediate_path = ""

## The options for full-text index in Mito engine.
[region_engine.mito.fulltext_index]

## Whether to create the index on flush.
## - `auto`: automatically (default)
## - `disable`: never
create_on_flush = "auto"

## Whether to create the index on compaction.
## - `auto`: automatically (default)
## - `disable`: never
create_on_compaction = "auto"

## Whether to apply the index on query
## - `auto`: automatically (default)
## - `disable`: never
apply_on_query = "auto"

## Memory threshold for index creation.
## - `auto`: automatically determine the threshold based on the system memory size (default)
## - `unlimited`: no memory limit
## - `[size]` e.g. `64MB`: fixed memory threshold
mem_threshold_on_create = "auto"

## The options for bloom filter in Mito engine.
[region_engine.mito.bloom_filter_index]

## Whether to create the bloom filter on flush.
## - `auto`: automatically (default)
## - `disable`: never
create_on_flush = "auto"

## Whether to create the bloom filter on compaction.
## - `auto`: automatically (default)
## - `disable`: never
create_on_compaction = "auto"

## Whether to apply the bloom filter on query
## - `auto`: automatically (default)
## - `disable`: never
apply_on_query = "auto"

## Memory threshold for bloom filter creation.
## - `auto`: automatically determine the threshold based on the system memory size (default)
## - `unlimited`: no memory limit
## - `[size]` e.g. `64MB`: fixed memory threshold
mem_threshold_on_create = "auto"

[[region_engine]]
## Enable the file engine.
[region_engine.file]

[[region_engine]]
## Metric engine options.
[region_engine.metric]
## Whether to use sparse primary key encoding.
sparse_primary_key_encoding = true

## The logging options.
[logging]
## The directory to store the log files. If set to empty, logs will not be written to files.
dir = "./greptimedb_data/logs"

## The log level. Can be `info`/`debug`/`warn`/`error`.
## @toml2docs:none-default
level = "info"

## Enable OTLP tracing.
enable_otlp_tracing = false

## The OTLP tracing endpoint.
otlp_endpoint = "http://localhost:4318/v1/traces"

## Whether to append logs to stdout.
append_stdout = true

## The log format. Can be `text`/`json`.
log_format = "text"

## The maximum amount of log files.
max_log_files = 720

## The OTLP tracing export protocol. Can be `grpc`/`http`.
otlp_export_protocol = "http"

## Additional OTLP headers, only valid when using OTLP http
[logging.otlp_headers]
## @toml2docs:none-default
#Authorization = "Bearer my-token"
## @toml2docs:none-default
#Database = "My database"

## The percentage of tracing will be sampled and exported.
## Valid range `[0, 1]`, 1 means all traces are sampled, 0 means all traces are not sampled, the default value is 1.
## ratio > 1 are treated as 1. Fractions < 0 are treated as 0
[logging.tracing_sample_ratio]
default_ratio = 1.0

## The slow query log options.
[slow_query]
## Whether to enable slow query log.
#+ enable = false

## The record type of slow queries. It can be `system_table` or `log`.
## @toml2docs:none-default
#+ record_type = "system_table"

## The threshold of slow query.
## @toml2docs:none-default
#+ threshold = "10s"

## The sampling ratio of slow query log. The value should be in the range of (0, 1].
## @toml2docs:none-default
#+ sample_ratio = 1.0

## The tracing options. Only effect when compiled with `tokio-console` feature.
#+ [tracing]
## The tokio console address.
## @toml2docs:none-default
#+ tokio_console_addr = "127.0.0.1"

## The memory options.
[memory]
## Whether to enable heap profiling activation during startup.
## When enabled, heap profiling will be activated if the `MALLOC_CONF` environment variable
## is set to "prof:true,prof_active:false". The official image adds this env variable.
## Default is true.
enable_heap_profiling = true