Werk #18280: BI: revert improve compiler performance with multi-core processing

Component	BI
Title	BI: revert improve compiler performance with multi-core processing
Date	Jul 15, 2025
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p35 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Werk #17897 introduced multi-core processing when compiling aggregations. This was intended to improve performance. However, users have reported very high system resource usage. So, it was determined to rollback this feature and investigate the underlying issue.

The bug was introduced in the following versions:

• 2.3.0p33
• 2.4.0p1

We recommended updating to the next release if you were affected by this issue. There is no user intervention necessary as the compilation occurs in the background.

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