apt install libjemalloc2
mkdir /etc/systemd/system/openproject-web-1.service.d
mkdir /etc/systemd/system/openproject-worker-1.service.d
cat - >/etc/systemd/system/openproject-worker-1.service.d/jemalloc.conf <<END
[Service]
Environment=LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2
END
cp /etc/systemd/system/openproject-worker-1.service.d/jemalloc.conf /etc/systemd/system/openproject-web-1.service.d/jemalloc.conf
systemctl stop openproject
systemctl daemon-reload
systemctl start openproject