Long fuzzy checkpoints

In last few days I observed potentialy alarming thing in Infomix log: long fuzzy checkpoints. That is, few times a day I get fuzzy checkpoint that lasts for 5-10 seconds. Maybe it doesn't sound so long, but this is the statistics that I gathered for last three months. Number of fuzzy chkpoints of duration 0 [s] = 14528 Number of fuzzy chkpoints of duration 1 [s] = 1441 Number of fuzzy chkpoints of duration 2 [s] = 380 Number of fuzzy chkpoints of duration 3 [s] = 50 Number of fuzzy chkpoints of duration 4 [s] = 9 Number of fuzzy chkpoints of duration 5 [s] = 6 Number of fuzzy chkpoints of duration 6 [s] = 3 Number of fuzzy chkpoints of duration 7 [s] = 3 Number of fuzzy chkpoints of duration 8 [s] = 0 Number of fuzzy chkpoints of duration 9 [s] = 5 Number of fuzzy chkpoints of duration 10 [s] = 1 ... etc. All those long (>= 5 s) fuzzy checkpoints happened this week. At the same time whenever I run 'onstat -R' it shows very little dirty buffers in LRU queues. Am I supposed to worry about all this? If yes, what could be the solution to the problem? Thanks everyone.