Very Slow Sync of Tracing Node

• OpenEthereum version: 2.5.2 stable
• Operating system: Linux
• Installation: homebrew / one-line installer
• Fully synchronized: no
• Network: ethereum
• Restarted: no

I was syncing the tracing node a MacBook and the sync occurred faster than on the server, however, the server is significantly more powerful than the MacBook. The current sync speed is approximately 1-3 blocks per second and the sync became exponentially slow after block 5,000,000.

The parameters of the config are presented below: --max-peers=40 --min-peers=20 --pruning=fast --tracing=on --cache-size=30000 --no-serve-light --no-periodic-snapshot --no-secretstore --no-ipc --jsonrpc-hosts all --jsonrpc-interface all --no-ws --scale-verifiers --mode=active