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What do you mean by MySQL goes offline? What error do you get on the page? Is it a “freeze” of pages or an actual DB error connection?
If the DB is actually shutdown, you should be able to see a shutdown/startup in the error log. Otherwise I’d suspect your DB engine is MyISAM, which does table level locks (vs row-level locks) on the whole table and makes editing posts simultaneously not possible.
Run these commands to get a feel of things:
mysql -u root -e "show table status" unixy_whmcs1|grep -i myisam
If you get many MyISAM tables, it’s probably time to switch to InnoDB.
Cheers
Yes I’d definitely switch to InnoDB. This issue would go away. Here’s a quick one liner:
mysql -u root -e "show tables" <my_db> | while read tbl; do echo mysql -u root -e "alter table ${tbl} engine=InnoDB" <my_db>; done