title: Avoid high daily charges with Cloud SQL
body: <p>So I am in a developing mode, and within 10 days of developing, I had a <strong>300$</strong> bill to Google.</p>
  <p>What I did :</p>
  <ol>
  <li>Created a test table, and added records to it - text and numbers.</li>
  <li>Performed multiple queries, from my Mac, I would say <strong>100 a day for 6 days</strong>.</li>
  <li>Have a table with around <strong>100k rows and 6 columns</strong>.</li>
  </ol>
  <p>This is what I do for every query (does reconnecting for every query cost more?) :</p>
  <pre><code>engine = sqlalchemy.create_engine('postgresql://' + username + ':' + password + '@' + host + ':' + port + '/' + database)
  df = pd.read_sql_query(current_query, engine)
  </code></pre>
  <ol start="4">
  <li>I am writing around 2000 rows at a time ( only me), and I was sometimes reading thousands of rows - for the development.</li>
  </ol>
  <p>You can see my charges <a href="https://i.stack.imgur.com/nGyBi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nGyBi.png" alt="here" /></a> and <a href="https://i.stack.imgur.com/CN2Fn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CN2Fn.png" alt="here" /></a></p>
  <ol start="5">
  <li>CPU show 1.4% constantly for 24 hours, but I do not use it all this time.</li>
  </ol>
  <p>I can see a <strong>daily</strong> charge of <strong>9$ for RAM and 8$ for CPU</strong>. The charge is <strong>constant</strong> and daily, so it seems it is not relate to my action.</p>
  <p>I talked with Google, and they could not explain the charge, nor you can see this on the <code>Console</code>.</p>
  <p>What can I do to understand exactly for what action they charged me ? it seems like a daily fixed amount.</p>
  <p>If this is how Google charge, it is scary to think how much would it cost with 10k users (or more)</p>