Some NeoFS Testnet storage nodes (nagisa, ai, yu) are periodically killed by OOM signal from OS. All these nodes has ~2GB RAM. We need to detect the reason and try to prevent it.

Possible reasons:

• incoming RPC spikes (server doesn't limit the incoming connections)
• outgoing RPC spikes (internal routines with API communication)
• internal work on some event (e.g. new epoch)
• ???

Observations also show that memory consuming sometimes happens almost simultaneously on different nodes, which can hint either at an external load spike on the container, or global event processing.