bitcoin core v0.19.1 slow to start?

[callmejoe]

recently upgraded from v0.18.0 to v.0.19.1.  seems slower to start to me.  verifying last 6 blocks takes longer than usual. used to take about 40 secs, now takes 90 secs.  and updating the blockchain takes a little while to get going.

it's not terrible, just wondering if anyone else experienced it too.

[jackg]

Any chance you could post more info? What operating system are you on, can you post the relevant parts of the debug log?.

It could be that there's more segwit Txs in blocks or blocks are somewhat fuller or the startup procedure for core may have changed.

[HCP]

just wondering if anyone else experienced it too.

Can't say I've noticed any real difference in speed of start up with 0.19.0.1 to be honest... Running on Windows 10 with the blocks folder actually sitting on an old HDD. It seems to be about the same if not slightly faster to start for me.

[Carlton Banks]

seems the same as 0.18.1 to me


this could be a coincidence based thing. It's somewhat random which 6 blocks were last when you quit the Bitcoin app, and they'll be the same 6 Bitcoin checks when you start it up again. Those blocks could (by sheer chance) be slow to verify. This could be because the blocks are all larger than average, or more subtly because they contain transactions with scripts that take alot of time to evaluate.

The following are typical causes of degraded disk performance:

• encrypting the disk
• allowing a Copy-on-write filesystem to become more than 60%-80% full
• allowing any disk that's also the main system disk to become 80%-90% full
• compressing the disk

if any of those factors came into play recently, they'll make a difference to Bitcoin's disk based performance

[callmejoe]

thanks for all the feedback everyone.

i'll keep playing around with it.