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TCP Keepalive

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Aikesheng Open Source Community
Aikesheng Open Source Community
Dec 4, 2020 · Databases

Effect of Floating IP (SIP) Switch on MySQL Connections and the Importance of TCP Keepalive

The article describes an experiment that shows when a floating IP (SIP) moves between MySQL servers, existing client connections experience long delays until TCP keepalive detects the failure, highlighting the need to configure shorter keepalive intervals for high‑availability database deployments.

Database ConnectivityFloating IPHigh Availability
0 likes · 4 min read
Effect of Floating IP (SIP) Switch on MySQL Connections and the Importance of TCP Keepalive
Efficient Ops
Efficient Ops
Mar 5, 2019 · Operations

Why Your Redis and MySQL Connections Time Out on Alibaba Cloud—and How to Fix Them

This article explains how idle TCP connections are silently dropped by Alibaba Cloud security groups, causing Redis client timeouts and MySQL JDBC CommunicationsExceptions, and provides step‑by‑step diagnostics and configuration changes—including TCP keepalive and wait_timeout tweaks—to prevent the failures.

Alibaba CloudConnection TimeoutHikariCP
0 likes · 20 min read
Why Your Redis and MySQL Connections Time Out on Alibaba Cloud—and How to Fix Them