Postgres up CPU to 340%

[KhaledAld]

I just setup Skygear server with docker-compose and Postgres.
when I use chat (send a message or typing ) Postgres is using up to 340% CPU.
This issue appears just when using chat.
Below is my compose file:

version: '2'

services:
db:
image: mdillon/postgis:9.5
ports:

• "5432:5432"
  volumes:
• db_data:/var/lib/postgresql/data

app:
image: quay.io/skygeario/skygear-server:latest
ports:

• "3001:3000"
  volumes:
• app_data:/go/src/app/data
  links:
• db
  command: skygear-server
  environment:
  DATABASE_URL: postgresql://postgres:@db/postgres?sslmode=disable
  APP_NAME: giftedChat
  API_KEY: larsa
  MASTER_KEY: larsa_comp
  TOKEN_STORE: jwt
  TOKEN_STORE_SECRET: jwt_secret
  PLUGINS: JS,CHAT
  JS_TRANSPORT: http
  JS_PATH: http://jsplugin:9000
  CHAT_TRANSPORT: zmq
  CHAT_PATH: chat
  CHAT_ARGS: tcp://0.0.0.0:5555
  ASSET_STORE: fs
  ASSET_STORE_URL_PREFIX: http://localhost:3000/files
  ASSET_STORE_SECRET: khaled_ald_gifted
  APNS_ENABLE: "YES"
  APNS_ENV: sandbox
  APNS_TYPE: token
  APNS_KEY_ID: xxxxxxxxxxxx
  APNS_TEAM_ID: xxxxxxxxxxxxx
  APNS_TOKEN_KEY_PATH: /app/data/cert/khaled.p8
  CUSTOM_TOKEN_SECRET: xxxxxxxxxxxxx

plugin:
build:
context: .
links:

• app
• db
  volumes:
• ./:/usr/src/app
  command: py-skygear chat
  environment:
  DATABASE_URL: postgresql://postgres:@db/postgres?sslmode=disable
  PUBSUB_URL: ws://app:3000/pubsub
  SKYGEAR_ADDRESS: tcp://app:5555
  SKYGEAR_ENDPOINT: http://app:3000
  APP_NAME: giftedChat
  API_KEY: larsa
  MASTER_KEY: larsa_comp
  TOKEN_STORE_SECRET: jwt_secret
  ASSET_STORE_URL_PREFIX: http://localhost:3000/
  ASSET_STORE: fs
  ASSET_STORE_SECRET: khaled_ald_gifted
  ZMQ_MAX_BOUNCE: 1

jsplugin:
image: quay.io/skygeario/skygear-node:canary
volumes:

• .:/usr/src/app
  environment:
  DATABASE_URL: postgres://postgres@db/postgres?sslmode=disable
  PUBSUB_URL: PUBSUB_URL=ws://app:3000/pubsub
  SKYGEAR_ENDPOINT: http://app:3000
  API_KEY: larsa
  MASTER_KEY: larsa_comp
  APP_NAME: giftedChat
  ASSET_STORE: fs
  ASSET_STORE_SECRET: khaled_ald_gifted
  ASSET_STORE_URL_PREFIX: http://localhost:3000/

volumes:
db_data:
driver: local
app_data:
driver: local

Any Suggestion ???