The definition of glean is  to obtain information or to collect grain left behind after harvesting. An example of glean is when you ask questions to try to find out information. An example of glean is when you collect the grain remaining in the field after the reapers have finished harvesting the field.
FOOD STORAGE â HOW LONG CAN YOU KEEP... PORK ROAST, ALL CUTS (INCLUDING LOIN, TENDERLOIN, BOSTON BUTT, SIRLOIN, BLADE, CROWN, PICNIC, SHOULDER) â COOKED. Refrigerate within two hours of cooking.
As to the absolute time cooked meat will keep, it depends on the storage temperature and the amount of water left in the meat. I think most people just feel after four or five days that something about it just puts them off. So, except for mistakes, few people ever keep it around until it actually spoils.