Statistics Buffer is full

Hi Everybody,


    I got this logged in my log file last night on my production
database while doing vacuumdb with analyze option , is this normal ?
does it affect the system anyway ? is there anyway to get rid of these
messages ?

2005-05-06 00:31:03 EDT%%% LOG:  statistics buffer is full
2005-05-06 00:31:15 EDT%%% LOG:  statistics buffer is full
2005-05-06 00:31:15 EDT%%% LOG:  statistics buffer is full
2005-05-06 00:31:15 EDT%%% LOG:  statistics buffer is full
2005-05-06 00:31:15 EDT%%% LOG:  statistics buffer is full


Thanks!
Pallav