Number of DB updates potentially freezing site at same time daily

G’day All,

Am having an issue where my site freezes every night at the same time daily. The only thing I can make out is that there seems to be a backlog of mySQL transactions and commits. An example of some of the log entries in this time period is shown below:

120107 22:34:54InnoDB: Warning: cannot find a free slot for an undo log. Do you have too
InnoDB: many active transactions running concurrently?
120107 22:34:54InnoDB: Warning: cannot find a free slot for an undo log. Do you have too
InnoDB: many active transactions running concurrently?
120109 13:50:40 InnoDB: ERROR: the age of the last checkpoint is 120792770,
InnoDB: which exceeds the log group capacity 120792269.
InnoDB: If you are using big BLOB or TEXT rows, you must set the
InnoDB: combined size of log files at least 10 times bigger than the
InnoDB: largest such row.
120110 9:27:04 InnoDB: ERROR: the age of the last checkpoint is 120792284,
InnoDB: which exceeds the log group capacity 120792269.
InnoDB: If you are using big BLOB or TEXT rows, you must set the
InnoDB: combined size of log files at least 10 times bigger than the
InnoDB: largest such row.

Would anyone have an idea how to get to the root cause of this issue - am stumped after going through the various configs and scenarios.

TIA.