Werk #20087: check-httpv2: reduce runtime overhead per check invocation

Component

Checks & agents

Title

check-httpv2: reduce runtime overhead per check invocation

Date

Jun 2, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

3.0.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p6	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p32	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, each invocation of check-httpv2 started a pool of worker threads to handle the HTTP request. Because the check only performs a single request, it could not benefit from the additional threads. On the contrary, starting the threads produced significant overhead related to the number of CPUs of the system.

The check now runs on a single thread, reducing the CPU and memory overhead of each invocation. This is particularly noticeable on sites that monitor many HTTP endpoints.

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