<p>It didn't goto zero. You can look at alternate sources <a href="https://core.jochen-hoenicke.de/queue/#2d" rel="noreferrer">https://core.jochen-hoenicke.de/queue/#2d</a> . What happened most probably is that blockchain.info's node went down/rebooted momentarily.</p>

CC BY-SA 3.0
2017-09-03T12:10:53.253Z
If that was the case I would have expected to see it recover, but it never did, seems like they started to ignore spam transactions (transactions with very low fees)
trampster
CC BY-SA 3.0
2017-08-29T11:47:47.373Z
2017-08-29T11:47:47.373Z
dark knight
<p>It looks like the node whose mempool size is used to generate this chart was rebooted. Also, this node appears to be running an old version of Core or another node software, because recent versions of Core persist the mempool across restarts.</p>

<p>Also see: 
<a href="https://bitcoin.stackexchange.com/q/46152/5406">How do transactions leave the memory pool?</a></p>

CC BY-SA 3.0
2017-08-31T00:41:24.367Z
2017-08-31T00:41:24.367Z
Murch
<p>65000 transactions is subtracted. <a href="https://bitcoinfees.21.co" rel="nofollow noreferrer">They are still there</a> (55441+14199) as long they are not canceled. The reason of subtraction seems to be too low fees, lesser than 30 satoshi. Maybe blockchain.info do not want to count "spam and attacks" in the statistics? It happened around 12:00 here in sweden. And a break out +$200 in Bitcoin price followed around 15:30.</p>

<p>The pools are only in the nodes. What they do when it gets full is up to them. </p>

<p><a href="https://i.sstatic.net/c5YJ3.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/c5YJ3.png" alt="https://bitcoinfees.21.co"></a></p>

CC BY-SA 3.0
2017-08-30T14:50:25.183Z
Made some edits to correct myself ;)
Pauli Sudarshan Terho
CC BY-SA 3.0
2017-08-30T10:46:42.177Z
2017-08-30T15:25:42.387Z
2017-08-30T15:25:42.387Z
Pauli Sudarshan Terho
<p>What caused the huge drop of the mempool from 60 MB to Less then 1 MB?</p>

<p>These transaction didn't get processed there was no 60 MB block mined at the time.</p>

<p>This occurred at 10:38 pm 29th August 2017 NZ time</p>

<p><a href="https://i.sstatic.net/E5c37.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/E5c37.png" alt="Mempool dropping to zero"></a></p>

<mempool>
Why did the Mempool suddenly drop to zero
trampster
# Why did the Mempool suddenly drop to zero

(Asked by: username_0 on 2017-08-29)

What caused the huge drop of the mempool from 60 MB to Less then 1 MB?

These transaction didn't get processed there was no 60 MB block mined at the time.

This occurred at 10:38 pm 29th August 2017 NZ time

[![Mempool dropping to zero](https://i.sstatic.net/E5c37.png)](https://i.sstatic.net/E5c37.png)

**Tags:** mempool


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## 3 answers

### Answer by username_1 on 2017-08-29. Score: 6

It didn't goto zero. You can look at alternate sources <https://core.jochen-hoenicke.de/queue/#2d> . What happened most probably is that blockchain.info's node went down/rebooted momentarily.

> **Comments:**
> **username_0**: If that was the case I would have expected to see it recover, but it never did, seems like they started to ignore spam transactions (transactions with very low fees)  

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### Answer by username_2 on 2017-08-31. Score: 1

It looks like the node whose mempool size is used to generate this chart was rebooted. Also, this node appears to be running an old version of Core or another node software, because recent versions of Core persist the mempool across restarts.

Also see:
[How do transactions leave the memory pool?](https://bitcoin.stackexchange.com/q/46152/5406)


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### Answer by username_3 on 2017-08-30. Score: -3

65000 transactions is subtracted. [They are still there](https://bitcoinfees.21.co) (55441+14199) as long they are not canceled. The reason of subtraction seems to be too low fees, lesser than 30 satoshi. Maybe blockchain.info do not want to count "spam and attacks" in the statistics? It happened around 12:00 here in sweden. And a break out +$200 in Bitcoin price followed around 15:30.

The pools are only in the nodes. What they do when it gets full is up to them.

[![https://bitcoinfees.21.co](https://i.sstatic.net/c5YJ3.png)](https://i.sstatic.net/c5YJ3.png)

> **Comments:**
> **username_3**: Made some edits to correct myself ;)  

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