Please refer below details.
>Did you create Solrconfig.xml for the collection from scratch after upgrading and reindexing?
Yes, We have created collection from scratch and also re-indexing.
>Was it based on the latest template?
Yes, It was as per latest template.
>What happens if you reexecute the query?
Not more visible difference. Minor change in milliseconds.
>Are there other processes/containers running on the same VM?
>How much heap and how much total memory you have?
My heap and total memory are same as Solr 6.1.0. heap memory 5 gb and total memory 25gb. As per me there is no issue related to memory.
>Maybe also you need to increase the corresponding caches in the config.
We are not using cache in both version.
Both version have same configuration.
From: Jörn Franke <[EMAIL PROTECTED]>
Sent: Thursday, May 21, 2020 7:05 PM
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Subject: Re: Query takes more time in Solr 8.5.1 compare to 6.1.0 version
Did you create Solrconfig.xml for the collection from scratch after upgrading and reindexing? Was it based on the latest template?
If not then please try this. Maybe also you need to increase the corresponding caches in the config.
What happens if you reexecute the query?
Are there other processes/containers running on the same VM?
How much heap and how much total memory you have? You should only have a minor fraction of the memory as heap and most of it „free“ (this means it is used for file caches).
> Am 21.05.2020 um 15:24 schrieb vishal patel <[EMAIL PROTECTED]>:
> Any one is looking this issue?
> I got same issue.
> Vishal Patel
> From: jay harkhani <[EMAIL PROTECTED]>
> Sent: Wednesday, May 20, 2020 7:39 PM
> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> Subject: Query takes more time in Solr 8.5.1 compare to 6.1.0 version
> Currently I upgrade Solr version from 6.1.0 to 8.5.1 and come across one issue. Query which have more ids (around 3000) and grouping is applied takes more time to execute. In Solr 6.1.0 it takes 677ms and in Solr 8.5.1 it takes 26090ms. While take reading we have same solr schema and same no. of records in both solr version.
> Please refer below details for query, logs and thead dump (generate from Solr Admin while execute query).
> Query : https://drive.google.com/file/d/1bavCqwHfJxoKHFzdOEt-mSG8N0fCHE-w/view
> Logs and Thread dump stack trace
> Solr 8.5.1 : https://drive.google.com/file/d/149IgaMdLomTjkngKHrwd80OSEa1eJbBF/view
> Solr 6.1.0 : https://drive.google.com/file/d/13v1u__fM8nHfyvA0Mnj30IhdffW6xhwQ/view
> To analyse further more we found that if we remove grouping field or we reduce no. of ids from query it execute fast. Is anything change in 8.5.1 version compare to 6.1.0 as in 6.1.0 even for large no. Ids along with grouping it works faster?
> Can someone please help to isolate this issue.
> Jay Harkhani.