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[merge 12/8/25] default MaxConnsPerHost to 2048 #3245

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[merge 12/8/25] default MaxConnsPerHost to 2048 #3245

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b640c37
default MaxConnsPerHost to 2048
lucix-aws Dec 4, 2025
69cf058
changelog
lucix-aws Dec 4, 2025
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8 changes: 8 additions & 0 deletions .changelog/e8481985f9794c4082447339c1d71a63.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
{
"id": "e8481985-f979-4c40-8244-7339c1d71a63",
"type": "feature",
"description": "The default value of MaxConnsPerHost in HTTP clients created by the SDK is now 2048, down from unlimited. See #3243.",
"modules": [
"."
]
}
2 changes: 2 additions & 0 deletions aws/transport/http/client.go
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Expand Up @@ -18,6 +18,7 @@ var (
// Default connection pool options
DefaultHTTPTransportMaxIdleConns = 100
DefaultHTTPTransportMaxIdleConnsPerHost = 10
DefaultHTTPTransportMaxConnsPerHost = 2048

// Default connection timeouts
DefaultHTTPTransportIdleConnTimeout = 90 * time.Second
Expand Down Expand Up @@ -186,6 +187,7 @@ func defaultHTTPTransport() *http.Transport {
TLSHandshakeTimeout: DefaultHTTPTransportTLSHandleshakeTimeout,
MaxIdleConns: DefaultHTTPTransportMaxIdleConns,
MaxIdleConnsPerHost: DefaultHTTPTransportMaxIdleConnsPerHost,
MaxConnsPerHost: DefaultHTTPTransportMaxConnsPerHost,
IdleConnTimeout: DefaultHTTPTransportIdleConnTimeout,
ExpectContinueTimeout: DefaultHTTPTransportExpectContinueTimeout,
ForceAttemptHTTP2: true,
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