chore: increase sql conn acquire rate limits (#915)

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## Changes

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lib/pools/src/lib.rs

@@ -146,7 +146,7 @@ async fn crdb_from_env(_client_name: String) -> Result<Option<CrdbPool>, Error>
 			// Increase lifetime to mitigate: https://github.com/launchbadge/sqlx/issues/2854
 			//
 			// See max lifetime https://www.cockroachlabs.com/docs/stable/connection-pooling#set-the-maximum-lifetime-of-connections
-			.max_lifetime(Duration::from_secs(30 * 60))
+			.max_lifetime(Duration::from_secs(15 * 60))
 			// Remove connections after a while in order to reduce load
 			// on CRDB after bursts
 			.idle_timeout(Some(Duration::from_secs(3 * 60)))

lib/pools/src/utils/sql_query_macros.rs

@@ -6,10 +6,10 @@ lazy_static::lazy_static! {
 		governor::clock::DefaultClock,
 		governor::middleware::NoOpMiddleware
 	> = governor::RateLimiter::direct(
-		// Limit how many connections can be created to the database
-		governor::Quota::per_second(std::num::NonZeroU32::new(10).unwrap())
-			// Allow creating at most 5 connections at the same time
-			.allow_burst(std::num::NonZeroU32::new(5).unwrap())
+		// Limit how fast the pool size can grow in order to encourage reusuing existing
+		// connections instead of opening new ones.
+		governor::Quota::per_minute(std::num::NonZeroU32::new(10 * 60).unwrap())
+			.allow_burst(std::num::NonZeroU32::new(500).unwrap())
 	);
 }
 

svc/pkg/cluster/standalone/default-update/src/lib.rs

@@ -186,8 +186,8 @@ pub async fn run_from_env(use_autoscaler: bool) -> GlobalResult<()> {
 				.into_iter()
 				.map(|(pool_type, pool)| {
 					let desired_count = match pool_type {
-						PoolType::Ats => Some(pool.desired_count),
-						PoolType::Job | PoolType::Gg => {
+						PoolType::Ats | PoolType::Gg => Some(pool.desired_count),
+						PoolType::Job => {
 							if use_autoscaler {
 								None
 							} else {