Scenario: A database keeps several counters that are updated frequently.
The update statement is simple:
UPDATE table SET count = count + 1
However, the updates are very frequent (not required show updated value constantly), so that it might be appropriate to find a way to upgrade in blocks (for save connections):
Instead of +1, +1, +1, +1, +1, +1, +1, +1, +1, +1 in short time periods (every one or few seconds), make a +80 in long time periods blocks (every 5 minutes).
How I can update counter value for save frequent connections?
(Note: I see UPDATE LOW_PRIORITY in MySQL databases, I find things similar)
A counter is a very simple thing. You could save the number in a text file if you want. Saving to a local file is usually easier on the server than running a query on the database and it sounds like you are already interested in reducing the load on the database. Use a file block (such as flock) if you are worried about the race condition; then have a script synchronize the database with the text file(s) with the frequency you think is appropriate (perhaps using a cron job).