PGPool memory requirements

What amount of physical memory is recommended for a dedicated PGPool machine running connection pooling & load balancing, but no query cache? I see num_init_children(96) * max_pool(2) * number_of_backends(2) = 384 lines in SHOW pool_pools; and the modal average seems to be about 99M per PID, with a couple of 1G outliers # top for 20 pgpool processes $ top -p $(pgrep pgpool | head -20 | tr "\\n" "," | sed 's/,$//') Tasks: 20 total, 0 running, 20 sleeping, 0 stopped, 0 zombie %Cpu(s): 3.1 us, 4.0 sy, 0.0 ni, 92.2 id, 0.0 wa, 0.0 hi, 0.7 si, 0.0 st KiB Mem : 1784080 total, 22068 free, 1629960 used, 132052 buff/cache KiB Swap: 4194300 total, 437328 free, 3756972 used. 71276 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 15407 root 20 0 97828 872 708 S 0.3 0.0 5:52.95 pgpool 8076 root 20 0 101664 2800 1708 S 0.0 0.2 0:06.51 pgpool 9597 root 20 0 101656 4508 1264 S 0.0 0.3 0:18.85 pgpool 13603 root 20 0 149936 35548 984 S 0.0 2.0 1:13.56 pgpool 13634 root 20 0 151848 39364 984 S 0.0 2.2 1:00.25 pgpool 13677 root 20 0 149424 37812 1180 S 0.0 2.1 0:28.03 pgpool 13680 root 20 0 153416 34948 1180 S 0.0 2.0 0:32.97 pgpool 15397 root 20 0 97820 828 668 S 0.0 0.0 0:33.05 pgpool 15399 root 20 0 97884 240 132 S 0.0 0.0 1:41.48 pgpool 15402 root 20 0 93636 72 0 S 0.0 0.0 0:07.12 pgpool 15405 root 20 0 93636 280 172 S 0.0 0.0 0:42.39 pgpool 17121 root 20 0 101676 2016 1648 S 0.0 0.1 0:03.39 pgpool 17206 root 20 0 97824 72 0 S 0.0 0.0 0:00.00 pgpool 17207 root 20 0 97820 164 56 S 0.0 0.0 0:00.27 pgpool 21348 root 20 0 3871428 1.090g 1536 S 0.0 64.1 429:48.53 pgpool 21917 root 20 0 102672 2832 1696 S 0.0 0.2 0:49.46 pgpool 22117 root 20 0 101692 2868 1752 S 0.0 0.2 0:16.57 pgpool 22436 root 20 0 101692 4644 3464 S 0.0 0.3 0:31.12 pgpool 23037 root 20 0 101692 3776 1780 S 0.0 0.2 0:20.52 pgpool 23142 root 20 0 101664 980 936 S 0.0 0.1 0:08.60 pgpool