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wip: add configuration for future feature (client concurrent db limits)

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Greg Heartsfield 2022-12-17 23:19:48 -06:00
parent 43222d44e5
commit 8598e443d8
2 changed files with 13 additions and 3 deletions
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12
config.toml
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@ -62,14 +62,22 @@ reject_future_seconds = 1800
[limits] [limits]
# Limit events created per second, averaged over one minute. Must be # Limit events created per second, averaged over one minute. Must be
# an integer. If not set (or set to 0), defaults to unlimited. # an integer. If not set (or set to 0), defaults to unlimited. Note:
#messages_per_sec = 0 # this is for the server as a whole, not per-connection.
# messages_per_sec = 0
# Limit client subscriptions created per second, averaged over one # Limit client subscriptions created per second, averaged over one
# minute. Must be an integer. If not set (or set to 0), defaults to # minute. Must be an integer. If not set (or set to 0), defaults to
# unlimited. # unlimited.
#subscriptions_per_min = 0 #subscriptions_per_min = 0
# UNIMPLEMENTED...
# Limit how many concurrent database connections a client can have.
# This prevents a single client from starting too many expensive
# database queries. Must be an integer. If not set (or set to 0),
# defaults to unlimited (subject to subscription limits).
#db_conns_per_client = 0
# Limit the maximum size of an EVENT message. Defaults to 128 KB. # Limit the maximum size of an EVENT message. Defaults to 128 KB.
# Set to 0 for unlimited. # Set to 0 for unlimited.
#max_event_bytes = 131072 #max_event_bytes = 131072

4
src/config.rs
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@ -53,7 +53,8 @@ pub struct Retention {
pub struct Limits { pub struct Limits {
pub messages_per_sec: Option<u32>, // Artificially slow down event writing to limit disk consumption (averaged over 1 minute) pub messages_per_sec: Option<u32>, // Artificially slow down event writing to limit disk consumption (averaged over 1 minute)
pub subscriptions_per_min: Option<u32>, // Artificially slow down request (db query) creation to prevent abuse (averaged over 1 minute) pub subscriptions_per_min: Option<u32>, // Artificially slow down request (db query) creation to prevent abuse (averaged over 1 minute)
pub max_event_bytes: Option<usize>, // Maximum size of an EVENT message pub db_conns_per_client: Option<u32>, // How many concurrent database queries (not subscriptions) may a client have?
pub max_event_bytes: Option<usize>, // Maximum size of an EVENT message
pub max_ws_message_bytes: Option<usize>, pub max_ws_message_bytes: Option<usize>,
pub max_ws_frame_bytes: Option<usize>, pub max_ws_frame_bytes: Option<usize>,
pub broadcast_buffer: usize, // events to buffer for subscribers (prevents slow readers from consuming memory) pub broadcast_buffer: usize, // events to buffer for subscribers (prevents slow readers from consuming memory)
@ -216,6 +217,7 @@ impl Default for Settings {
limits: Limits { limits: Limits {
messages_per_sec: None, messages_per_sec: None,
subscriptions_per_min: None, subscriptions_per_min: None,
db_conns_per_client: None,
max_event_bytes: Some(2 << 17), // 128K max_event_bytes: Some(2 << 17), // 128K
max_ws_message_bytes: Some(2 << 17), // 128K max_ws_message_bytes: Some(2 << 17), // 128K
max_ws_frame_bytes: Some(2 << 17), // 128K max_ws_frame_bytes: Some(2 << 17), // 128K