Set up docs MCPThese settings are available in system.settings and are autogenerated from the ClickHouse snapshot.
jemalloc_collect_profile_samples_in_trace_log
Collect jemalloc allocation and deallocation samples in trace log.
jemalloc_enable_profiler
Enable jemalloc profiler for the query. 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