Ayub,
On 6/14/21 17:10, Ayub Khan wrote:
On Thu, 10 Jun 2021, 08:10 Ayub Khan, <ayub...@gmail.com> wrote:
Seeing client write waits on postgresql as attached in the image. Is there
any bottle neck which is causing the client write waits on postgresql ?
Below is the test setup
Jmeter-->(load balanced tomcat on ec2 instances)---->rds read replicas
All these are running on different ec2 instances in AWS cloud in the same
region
below is the config of the http connector on tomcat:
<Connector port="8080"
protocol="org.apache.coyote.http11.Http11NioProtocol"
connectionTimeout="120000" maxThreads="50000"
maxConnections="50000"
URIEncoding="UTF-8"
redirectPort="8443" />
Below are the specs of the server:
Ec2 instance which is running tomcat 8.5
c5.9x large
36 vpcu
72GB memory
10GBPS network
EBS band width 9500
postgresql RDS db.r6g.16xlarge
512 GB memory
64 VCPU
25 Gibs network
AWS Gravitron cpu
In jprofiler I see that the threads are waiting on reading the response
from database side
If those threads are waiting, they shouldn't be using any CPU time at
all. If they are all waiting on your database, it seems that your
database is taking a long time to respond to requests.
With 50000 threads, maybe you are making too many requests against your
(possibly underpowered) database to make any progress.
-chris
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