<p>That is referring to what is now called the mempool.</p>

<p>The wiki is unmaintained, and contains mostly outdated or incomplete information. I would suggest you use the bitcoin.org documentation instead.</p>

CC BY-SA 3.0
2017-06-09T19:12:47.197Z
And what about the orphan transactions? Are they in a separate data structure called orphan pool?
Önder Gürcan
CC BY-SA 3.0
2017-06-09T19:25:29.490Z
Yes, as I explained here: https://bitcoin.stackexchange.com/a/54322/208
Pieter Wuille
CC BY-SA 3.0
2017-06-09T18:28:06.183Z
2017-06-09T18:28:06.183Z
Pieter Wuille
<p>As far I know, unconfirmed transactions are stored in the <em>memory pool</em>. However, in <a href="https://en.bitcoin.it/wiki/Protocol_rules" rel="nofollow noreferrer">the Bitcoin wiki</a>, I see a data structure called <em>transaction pool</em>. Are they the same thing or not? Also for the orphan transactions, as far as I know they are stored in data structure called <em>orphan pool</em>, right?</p>

<unconfirmed-transactions><terminology><mempool>
Are memory pool and transaction pool the same thing?
Önder Gürcan
# Are memory pool and transaction pool the same thing?

(Asked by: username_0 on 2017-06-09)

As far I know, unconfirmed transactions are stored in the *memory pool*. However, in [the Bitcoin wiki](https://en.bitcoin.it/wiki/Protocol_rules), I see a data structure called *transaction pool*. Are they the same thing or not? Also for the orphan transactions, as far as I know they are stored in data structure called *orphan pool*, right?

**Tags:** unconfirmed-transactions, terminology, mempool


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## 1 answers

### Answer by username_1 on 2017-06-09. Score: 3 | Accepted answer

That is referring to what is now called the mempool.

The wiki is unmaintained, and contains mostly outdated or incomplete information. I would suggest you use the bitcoin.org documentation instead.

> **Comments:**
> **username_0**: And what about the orphan transactions? Are they in a separate data structure called orphan pool?  
> **username_1**: Yes, as I explained here: https://bitcoin.stackexchange.com/a/54322/208  

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