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proxy: reduce number of concurrent connections (#7620)

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## Problem

Usually, the connection itself is quite fast (bellow 10ms for p999:
https://neonprod.grafana.net/goto/aOyn8vYIg?orgId=1).

It doesn't make a lot of sense to wait for a lot of time for the lock,
if it takes a lot of time to acquire it, probably, something goes wrong.

We also spawn a lot of retries, but they are not super helpful (0 means
that it was connected successfully, 1, most probably, that it was
re-request of the compute node address
https://neonprod.grafana.net/goto/J_8VQvLIR?orgId=1). Let's try to keep
a small number of retries.
This commit is contained in:
Anna Khanova
2024-05-06 21:03:25 +02:00
committed by GitHub
parent 7dd58e1449
commit f1b654b77d
1 changed files with 3 additions and 3 deletions
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6
proxy/src/config.rs
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@@ -536,9 +536,9 @@ pub struct RetryConfig {
impl RetryConfig {
/// Default options for RetryConfig.
/// Total delay for 8 retries with 100ms base delay and 1.6 backoff factor is about 7s.
/// Total delay for 5 retries with 200ms base delay and 2 backoff factor is about 6s.
pub const CONNECT_TO_COMPUTE_DEFAULT_VALUES: &'static str =
"num_retries=8,base_retry_wait_duration=100ms,retry_wait_exponent_base=1.6";
"num_retries=5,base_retry_wait_duration=200ms,retry_wait_exponent_base=2";
/// Total delay for 8 retries with 100ms base delay and 1.6 backoff factor is about 7s.
/// Cplane has timeout of 60s on each request. 8m7s in total.
pub const WAKE_COMPUTE_DEFAULT_VALUES: &'static str =
@@ -592,7 +592,7 @@ impl ConcurrencyLockOptions {
pub const DEFAULT_OPTIONS_WAKE_COMPUTE_LOCK: &'static str = "permits=0";
/// Default options for [`crate::console::provider::ApiLocks`].
pub const DEFAULT_OPTIONS_CONNECT_COMPUTE_LOCK: &'static str =
"shards=64,permits=50,epoch=10m,timeout=500ms";
"shards=64,permits=10,epoch=10m,timeout=10ms";
// pub const DEFAULT_OPTIONS_WAKE_COMPUTE_LOCK: &'static str = "shards=32,permits=4,epoch=10m,timeout=1s";