ClickHouse crashes without SSE4.2 CPU instructions
criticalconfigurationUpdated Feb 16, 2026(via Exa)
How to detect:
ClickHouse container crashes immediately with 'Illegal instruction (core dumped)' when CPU lacks SSE4.2 instruction set. This is a hard requirement - requires Intel Nehalem or newer, or AMD Bulldozer or newer processors. Virtual machines must have SSE4.2 pass-through enabled.
Recommended action:
Run 'grep sse4_2 /proc/cpuinfo' on the host to detect SSE4.2 support. If missing, enable SSE4.2 pass-through in VM hypervisor settings, or migrate to physical hardware with SSE4.2 support (Intel Nehalem+ or AMD Bulldozer+).