152 Commits

Author	SHA1	Message	Date
Tom Lane	af5ced9cfd	Further work on connecting the free space map (which is still just a ... stub) into the rest of the system. Adopt a cleaner approach to preventing deadlock in concurrent heap_updates: allow RelationGetBufferForTuple to select any page of the rel, and put the onus on it to lock both buffers in a consistent order. Remove no-longer-needed isExtend hack from API of ReleaseAndReadBuffer.	2001-06-29 21:08:25 +00:00
Tom Lane	e0c9301c87	Install infrastructure for shared-memory free space map. Doesn't actually ... do anything yet, but it has the necessary connections to initialization and so forth. Make some gestures towards allowing number of blocks in a relation to be BlockNumber, ie, unsigned int, rather than signed int. (I doubt I got all the places that are sloppy about it, yet.) On the way, replace the hardwired NLOCKS_PER_XACT fudge factor with a GUC variable.	2001-06-27 23:31:40 +00:00