#h      event   clock absdiff pctdiff
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_null_getpage+128       815812813.328709 - -
_null_getpage+128       815812813.353830 - -
_null_getpage+128       815812813.357169 - -
_null_getpage+128       815812813.375844 - -
_null_getpage+128       815812813.378358 - -
#  | /home/johnh/BIN/DB/dbrow 
#  | /home/johnh/BIN/DB/dbcol event clock