I had a client with a fairly large multisite. He needed the size limits for new media uploads to be around 8 megs. I tried adjusting php.ini
upload_max_filesize = 8M
poas_max_size = 8M
Nope, still limited. I tried adding define(‘WP_MEMORY_LIMIT’, ‘8M’); to the wp-config.php file, still limited to 1MB when trying to upload. Well, it’s simple. In the WP Network Admin go to Network Settings, scroll to the bottom and voila:
Site upload space Limit total size of files uploaded to “Max upload file size” set in KB’s. Just changed that to 8000 and everything was a go!