max_execution_time instant error

You may also be running into a memory limit. Try bumping that up and see what happens.

My memory_limit size was 256MB. I set 512MB – the same situation. ((

check your server error logs. Without that information, we’re just shooting in the dark at this point.

there are no errors in the apache2 log file

Try turning on debugging in your wp-config.php, see if that starts showing any errors.

It’s very strange, but it turned out that there is no table ewwwio_images.
I created it using the functions ewww_image_optimizer_install_table from file common.php

After this process has started.
He has already done an hour …
Maybe I should make some data into the table (now empty)?

Yeah, that table should not stay empty for long. If it is, something else is going very wrong.

Are you using the metaslider plugin?

no

did you get it all working right, or are you still having any trouble with the process?

When debug mode is disabled I get the message: “Operation timed out, you may need to increase the max_execution_time for PHP”.

When debug mode is enabled, the process is not completed.
I only see a rotating circle. I waited for over an hour – the process was not completed. I think that nothing had happened.

See if you can check your server error logs for more information (ask your webhost if you don’t know where to find those).

I get the following message:
Allowed memory size of 268435456 bytes exhausted (tried to allocate 4294916270 bytes) in /…./wp-content/plugins/ewww-image-optimizer/ewww-image-optimizer.php

Why plugin wants so much RAM ?!

Yeah, you need to increase the max memory. The amount of RAM depends on how many images you are asking it to scan. EWWW tries to be as efficient as possible, but if you ask it to scan a folder with thousands of images, all bets are off. I’ve never seen it ask for 4GB before though…

I ask it to scan a folder with only one image (for test)