With the default of 20 active plans the max size of a temporary lob is 1/80 of the storage space. With the default of 50 gb that is approximately 625 mb. A single large temporary lob or set of lobs (for example from using copylobs) could easily exceed that. Once we added TEIID-5584, we do a better job of recovering from out of disk situations (the biggest possible downside is that in high concurrency situations more sessions than necessary may be killed). So with this change we strike a different balance that will allow for a larger max size. With the default of 20 active plans we'll now allow a max size of 1/6 th of the storage space - anything larger than that is certainly indicative of a problem that should be killed immediately. The actual calculation is max space / max active plans ^ .6 so that even much higher numbers of active plans can still have rather large lobs.
Quality Risk
Major
With the default of 20 active plans the max size of a temporary lob is 1/80 of the storage space. With the default of 50 gb that is approximately 625 mb. A single large temporary lob or set of lobs (for example from using copylobs) could easily exceed that. Once we added
TEIID-5584, we do a better job of recovering from out of disk situations (the biggest possible downside is that in high concurrency situations more sessions than necessary may be killed). So with this change we strike a different balance that will allow for a larger max size. With the default of 20 active plans we'll now allow a max size of 1/6 th of the storage space - anything larger than that is certainly indicative of a problem that should be killed immediately. The actual calculation is max space / max active plans ^ .6 so that even much higher numbers of active plans can still have rather large lobs.