Single Status Update
We experience the slowness in loading invoice page after clicking complete order. I have tested with removing all third party and custom hooks and addons and using default template -six. Also increased our mysql and whmcs server RAM and also done whmcs support instruction below
"As a starting point, you may want to set max_connections to a low value like 50 and increase based on your available RAM. Other important setting are wait_timeout (at least 600, so MySQL doesn't drop connections too soon), table_definition_cache (at least 5000), sort_buffer (2-4M seems to be good), read_buffer (2-4M seems to be good) and max_allowed_packet (16M is usually fine)." But still no improvement.Why it is too slow after clicking completeorder button in whmcs.