I spoted that my monerod nad monero-blockchain-imports slows down my HDD drive to craw (v0.17.1.9 from [https://www.getmonero.org/downloads/#cli](https://www.getmonero.org/downloads/#cli) ) . Other programs are working just fine with speeds around 80MB/s both ways. But when i was starting monerod or blockchain import my speeds was slowing down to crawl - 100-200kb/s.
I dig a bit into this issue and i spoted that monerod for some reason is spaming like crazy fsyncs - orders to synchronize write cache to drive. I understand it's made to protecy my data from being unavailable, but it's spamming them 6 times per second - it's far more often than PostgreSQL and sqlite3. So i installed eat-my-data lib which disables fsyncs, osyncs and similar slow downs ( [https://www.flamingspork.com/projects/libeatmydata/](https://www.flamingspork.com/projects/libeatmydata/) ) and my speeds from 200kb/s went into stable 2MB/s.
Another plus is that i can still use my drive like normal - Thunderbird which have some email accounts on the same hdd is not longer freezing - movies are plaing without issues. Yeah - your data are not as secure as They was in case of power failure, but i think there should be some option to disable this fsync spam - user experience is much better, SSD live will be much greater thanks to write cache working as intended - and you can use your computer without issues when full node is running.
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