[USERGRID-1340] High response time for activity post in group

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.2.0
• Fix Version/s: 2.2.0
• Component/s: Stack

Environment

OS: Ubuntu 14.04;
Cassandra version: 2.2.6 (DataStax);
Elasticsearch version: 1.4.4;
Tomcat version: 7;
JDK version: 1.8.0_65 (Oracle);
Usergrid version: 2.2.0 (Master branch, 3rd May, 2016)

• Assignee: Unassigned
• Reporter: Jaskaran
• Created: 02/Mar/17 06:09
• Updated: 02/Mar/17 06:09

Description

I'm writing this regarding a new issue that I'm facing with latest 'master'
branch of Usergrid (last commit on 3rd May, 2016). Note, this branch has
some fixes over 2.1.0 release and hence I'm using it.

Issue is related to the response time of activity post in a group (with
users > 500) which is quite high (~ 3 sec) in comparison to the response
time in older (release 2.1.0) build.

Below are the replication steps:

1. Make a group.
2. Make few users (say 10) member of above group.
3. Make an activity post in that group by one of the member user and note
down the response time.
4. Now, make more users (>500) member of this group.
5. Repeat step 3.

API: POST http://host/<org_id>/<app_id>/groups/<group_id>/activities
Post Body:
{
"actor":

{ "uuid": "<member_user_id>" }

, "verb": "post", "comment":
"Hello"
}

I'm facing this issue repeatedly. Please suggest if anything has changed
implementation-wise or am I doing something wrong here.