diff --git a/config/docker/Dockerfile.danbooru b/config/docker/Dockerfile.danbooru
index 746eb4d4e..9e203e696 100644
--- a/config/docker/Dockerfile.danbooru
+++ b/config/docker/Dockerfile.danbooru
@@ -61,6 +61,7 @@ RUN \
 FROM base as production
 
 ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2
+ENV MALLOC_CONF=background_thread:true,narenas:2,dirty_decay_ms:1000,muzzy_decay_ms:0,tcache:false
 
 COPY --from=development /root /root
 COPY --from=development /danbooru /danbooru