Syncing Bitcoin core | Bitcointalksearch.org

ABCbits

legendary

Activity: 2870

Merit: 7490

Crypto Swap Exchange

Quote from: xShadezz on March 26, 2021, 09:46:21 PM

and now my rate is suddenly 0.01% and it takes forever to finihs the reamining blocks is that normal?

The rate is when you just open Bitcoin Core is misleading because,
1. Bitcoin Core only connect to 2 nodes during startup
2. There's not enough historic data (how long to download/verify each block) to make good estimation

Quote from: NotATether on March 27, 2021, 12:42:35 AM

Quote from: ranochigo on March 26, 2021, 11:11:21 PM

It can be misleading as it often freezes the UI while synchronizing.

This isn't supposed to happen because the Qt window is supposed to be in a separate thread from the transaction verification thread, and there's only one verification thread only, unless the UI is sleep-waiting on the verification thread to finish (??) in which case it makes sense that it freezes because the verification thread is constantly waiting on disk I/O.

It also happens to me (on Bitcoin Core 0.21.0)

odolvlobo

legendary

Activity: 4354

Merit: 3260

Quote from: xShadezz on March 26, 2021, 09:46:21 PM

I have a question about syncing my bitcoin core. I didnt use it for a few weeks and had to update a few thousand blocks I did this yesterday with a rate of 4% per hour. I fully synced it now 24h later I opened it again to resync what happend in those 24h and now my rate is suddenly 0.01% and it takes forever to finihs the reamining blocks is that normal?

I think the problem is probably related to connecting to peers in order to obtain the blocks. The rate should improve as you connect to more peers.

ranochigo

legendary

Activity: 2982

Merit: 4193

Quote from: NotATether on March 27, 2021, 12:42:35 AM

This isn't supposed to happen because the Qt window is supposed to be in a separate thread from the transaction verification thread, and there's only one verification thread only, unless the UI is sleep-waiting on the verification thread to finish (??) in which case it makes sense because the verification thread is constantly waiting on disk I/O.

It happens: https://bitcointalksearch.org/topic/m.56287394.

Quote from: NotATether on March 27, 2021, 12:42:35 AM

Your CPU usage while Bitcoin Core is freezing is fairly low, right? The other way it would make sense that it's freezing is when you're low on memory and Core "thrashes" the disk with more dbcache that it has to move between disk and RAM.

I have limited my dbcache to 100MB before and it didn't help one bit. There is literally no way for the UI to be freezing due to resource constraints on my computer. Free ram usually hovers around 7GB or so and my NVMe isn't a bottleneck at all.

NotATether

legendary

Activity: 1568

Merit: 6660

bitcoincleanup.com / bitmixlist.org

Quote from: ranochigo on March 26, 2021, 11:11:21 PM

It can be misleading as it often freezes the UI while synchronizing.

This isn't supposed to happen because the Qt window is supposed to be in a separate thread from the transaction verification thread, and there's only one verification thread only, unless the UI is sleep-waiting on the verification thread to finish (??) in which case it makes sense that it freezes because the verification thread is constantly waiting on disk I/O.

Your CPU usage while Bitcoin Core is freezing is fairly low, right? The other way it would make sense that it's freezing is when you're low on memory and Core "thrashes" the disk with more dbcache that it has to move between disk and RAM.

ranochigo

legendary

Activity: 2982

Merit: 4193

Blocks were generated in those 24 hours for which the client has to synchronize to catch up. From my experience, the synchronization when there are lesser blocks to catch up is much slower. It can be misleading as it often freezes the UI while synchronizing. It should be fine as long as you are able to wait for a bit.

My fairly powerful computer freezes as it starts to synchronize and only displays the initial rate which is usually fairly low (0.05%).

xShadezz

newbie

Activity: 8

Merit: 0

Hey there,

I have a question about syncing my bitcoin core. I didnt use it for a few weeks and had to update a few thousand blocks I did this yesterday with a rate of 4% per hour. I fully synced it now 24h later I opened it again to resync what happend in those 24h and now my rate is suddenly 0.01% and it takes forever to finihs the reamining blocks is that normal?

Topic: Syncing Bitcoin core (Read 110 times)