Fix for user-1001.slice Memory Limits

Problem

The user-1001.slice had:

MemoryMax=32G (hard cap - OOM kill at limit)
MemorySwapMax=0 (swap disabled)

This caused hard process kills when memory hit 32G instead of allowing the kernel to reclaim memory gracefully or use swap.

Solution

Changed to:

MemoryHigh=32G (soft cap - kernel applies pressure and reclaims)
MemoryMax=infinity (no hard kill)
MemorySwapMax=infinity (can use system swap)

Configuration Files

Persistent configs in /etc/systemd/system.control/user-1001.slice.d/:

50-MemoryHigh.conf: MemoryHigh=34359738368 (32G)
50-MemoryMax.conf: MemoryMax=infinity
50-MemorySwapMax.conf: MemorySwapMax=infinity

Verification

# Current cgroup values
cat /sys/fs/cgroup/user.slice/user-1001.slice/memory.high     # 34359738368 (32G)
cat /sys/fs/cgroup/user.slice/user-1001.slice/memory.max      # max (unlimited)
cat /sys/fs/cgroup/user.slice/user-1001.slice/memory.swap.max # max (unlimited)

# systemd properties
systemctl show user-1001.slice | grep -E "MemoryMax|MemoryHigh|MemorySwapMax"

How It Was Done

sudo systemctl set-property -- user-1001.slice MemoryMax=infinity MemorySwapMax=infinity MemoryHigh=32G

The systemctl set-property command without --runtime makes the changes persistent across reboots by creating drop-in files in /etc/systemd/system.control/.

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