Build clickhouse without tcmalloc. cmake -D ENABLE_TCMALLOC=0

Copy clickhouse binary to your server.
scp programs/clickhouse server:~

ssh to your server

Stop clickhouse:
sudo service clickhouse-server stop

Run clickhouse with heap profiler from the terminal:
sudo -u clickhouse LD_PRELOAD=/usr/lib/libtcmalloc.so HEAPPROFILE=/var/log/clickhouse-server/heap.hprof ./clickhouse server --config /etc/clickhouse-server/config.xml

Profiles will appear in /var/log/clickhouse-server/