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These settings configure the ClickHouse server and are autogenerated from ClickHouse source.

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jemalloc_enable_background_threads

Enable jemalloc background threads. Jemalloc uses background threads to cleanup unused memory pages. Disabling it could lead to performance degradation.

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jemalloc_enable_global_profiler

Enable jemalloc’s allocation profiler for all threads. Jemalloc will sample allocations and all deallocations for sampled allocations. Profiles can be flushed using SYSTEM JEMALLOC FLUSH PROFILE which can be used for allocation analysis. Samples can also be stored in system.trace_log using config jemalloc_collect_global_profile_samples_in_trace_log or with query setting jemalloc_collect_profile_samples_in_trace_log. See Allocation Profiling
Last modified on July 23, 2026