# The indexing speed become more and more slowly
**URL:** https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987
**Category:** Elasticsearch
**Created:** [March 4, 2013, 8:48am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987 "2013-03-04T08:48:05Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Hoony](https://discuss.elastic.co/u/Hoony)
#### Post date: [March 4, 2013, 8:48am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987/1 "2013-03-04T08:48:05Z")
Hi all,
```
My elasticsearch indexing become more and more slowly by the size of
```
index increase.
e.x.
The 1 GB file indexing need 10 min at the beginning, and it become
more and more slowly.
like here:
1time 1GB file ------------- 10min indexing
2time 1GB file ------------- 12min indexing
3time 1GB file ------------- 14min indexing
```
I found the indexing rate became 1 MB/s near the end.
Is it normal?
```
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### Author:  [@simonw\_2](https://discuss.elastic.co/u/simonw_2)
#### Post date: [March 4, 2013, 9:11am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987/2 "2013-03-04T09:11:33Z")
it's not 🙂 can we get more info about your cluster / setup. I am wondering
about things like:
- indexing rate
- are you doing bulk
- memory settings
- hardware configuration
- any special settings like merge throtteling or custom merge policies
- are you searching on the same cluster at the same time?
simon
On Monday, March 4, 2013 9:48:05 AM UTC+1, Hoony wrote:
> Hi all,
>
> ```
> My elasticsearch indexing become more and more slowly by the size of
>
> ```
>
> index increase.
> e.x.
> The 1 GB file indexing need 10 min at the beginning, and it become
> more and more slowly.
> like here:
> 1time 1GB file ------------- 10min indexing
> 2time 1GB file ------------- 12min indexing
> 3time 1GB file ------------- 14min indexing
>
> ```
> I found the indexing rate became 1 MB/s near the end.
>
> Is it normal?
>
> ```
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### Author:  [@Hoony](https://discuss.elastic.co/u/Hoony)
#### Post date: [March 5, 2013, 1:53am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987/3 "2013-03-05T01:53:49Z")
My cluster environment here:
- indexing rate - I am not sure what you need, because the rate is not
established and the speed becomes more and more slow , as I said before.
- are you doing bulk - I used bulk and the bulk size is 2000.
- memory settings - ram is 16GB and configured 8GB for ES
- hardware configuration - CPU 4core 3.3 ghz
- any special settings like merge throtteling or custom merge policies
- I used the default merge setting.
- are you searching on the same cluster at the same time? - I just
indexing without searching on my cluster at the same time.
在 2013年3月4日星期一UTC+9下午6时11分33秒，simonw写道：
> it's not 🙂 can we get more info about your cluster / setup. I am
> wondering about things like:
>
> - indexing rate
> - are you doing bulk
> - memory settings
> - hardware configuration
> - any special settings like merge throtteling or custom merge policies
> - are you searching on the same cluster at the same time?
>
> simon
>
> On Monday, March 4, 2013 9:48:05 AM UTC+1, Hoony wrote:
>
> > Hi all,
> >
> > ```
> > My elasticsearch indexing become more and more slowly by the size
> >
> > ```
> >
> > of index increase.
> > e.x.
> > The 1 GB file indexing need 10 min at the beginning, and it become
> > more and more slowly.
> > like here:
> > 1time 1GB file ------------- 10min indexing
> > 2time 1GB file ------------- 12min indexing
> > 3time 1GB file ------------- 14min indexing
> >
> > ```
> > I found the indexing rate became 1 MB/s near the end.
> >
> > Is it normal?
> >
> > ```
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---
### Author:  [@otisg](https://discuss.elastic.co/u/otisg)
#### Post date: [March 5, 2013, 2:56am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987/4 "2013-03-05T02:56:03Z")
Hi,
I think Hoony may be seeing the effect of Lucene segment merging, no?
We just did some ES indexing benchmarking and observed the same thing.
## Otis
ELASTICSEARCH Performance Monitoring - [Sematext Monitoring | Infrastructure Monitoring Service](http://sematext.com/spm/index.html)
On Monday, March 4, 2013 4:11:33 AM UTC-5, simonw wrote:
> it's not 🙂 can we get more info about your cluster / setup. I am
> wondering about things like:
>
> - indexing rate
> - are you doing bulk
> - memory settings
> - hardware configuration
> - any special settings like merge throtteling or custom merge policies
> - are you searching on the same cluster at the same time?
>
> simon
>
> On Monday, March 4, 2013 9:48:05 AM UTC+1, Hoony wrote:
>
> > Hi all,
> >
> > ```
> > My elasticsearch indexing become more and more slowly by the size
> >
> > ```
> >
> > of index increase.
> > e.x.
> > The 1 GB file indexing need 10 min at the beginning, and it become
> > more and more slowly.
> > like here:
> > 1time 1GB file ------------- 10min indexing
> > 2time 1GB file ------------- 12min indexing
> > 3time 1GB file ------------- 14min indexing
> >
> > ```
> > I found the indexing rate became 1 MB/s near the end.
> >
> > Is it normal?
> >
> > ```
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---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 2:48am UTC](https://discuss.elastic.co/t/the-indexing-speed-become-more-and-more-slowly/10987/5 "2017-07-06T02:48:23Z")