25 Commits (fe90c54800a2e6799664f372a8636adbb1fc5a06)

Author	SHA1	Message	Date
Bruce Momjian	fe90c54800	Add var defines for no testandset	27 years ago
Tom Lane	642d21a59b	Move default NBuffers setting into config.h, and rename it ... to DEF_NBUFFERS for readability. Make sure the default value is OK according to postmaster.c's new sanity check for -B values.	27 years ago
Bruce Momjian	07842084fe	pgindent run over code.	27 years ago
Tom Lane	bcfdc9df04	Repair some pretty serious problems in dynahash.c and ... shared memory space allocation. It's a wonder we have not seen bug reports traceable to this area ... it's quite clear that the routine dir_realloc() has never worked correctly, for example.	27 years ago
Bruce Momjian	6724a50787	Change my-function-name-- to my_function_name, and optimizer renames.	27 years ago
Vadim B. Mikheev	3f7fbf85dc	Initial MVCC code. ... New code for locking buffer' context.	27 years ago
Bruce Momjian	fa1a8d6a97	OK, folks, here is the pgindent output.	28 years ago
Bruce Momjian	54aabaa800	Rename BindingTable to ShmemIndex.	28 years ago
Bruce Momjian	679d39b9c8	Goodbye ABORT. Hello ERROR for all errors.	28 years ago
Bruce Momjian	0d9fc5afd6	Change elog(WARN) to elog(ERROR) and elog(ABORT).	28 years ago
Vadim B. Mikheev	32cd09ac6d	Good Bye, Time Travel!	29 years ago
Bruce Momjian	3f365ba0fc	Inline memset() as MemSet().	29 years ago
Bruce Momjian	8cb4154492	Inline frequently called functions.	29 years ago
Bruce Momjian	319dbfa736	Another PGINDENT run that changes variable indenting and case label indenting. Also static variable indenting.	29 years ago
Bruce Momjian	1ccd423235	Massive commit to run PGINDENT on all *.c and *.h files.	29 years ago
Bruce Momjian	79e78f0b80	Added SCO support, from Daniel Harris.	29 years ago
Vadim B. Mikheev	d3dfc664d0	PrintBufferUsage() changed to report about shared, local and direct ... blocks transfferes.	29 years ago
Marc G. Fournier	159f8c63ad	From: Dan McGuirk <mcguirk@indirect.com> ... Reply-To: hackers@hub.org, Dan McGuirk <mcguirk@indirect.com> To: hackers@hub.org Subject: [HACKERS] tmin writeback optimization I was doing some profiling of the backend, and noticed that during a certain benchmark I was running somewhere between 30% and 75% of the backend's CPU time was being spent in calls to TransactionIdDidCommit() from HeapTupleSatisfiesNow() or HeapTupleSatisfiesItself() to determine that changed rows' transactions had in fact been committed even though the rows' tmin values had not yet been set. When a query looks at a given row, it needs to figure out whether the transaction that changed the row has been committed and hence it should pay attention to the row, or whether on the other hand the transaction is still in progress or has been aborted and hence the row should be ignored. If a tmin value is set, it is known definitively that the row's transaction has been committed. However, if tmin is not set, the transaction referred to in xmin must be looked up in pg_log, and this is what the backend was spending a lot of time doing during my benchmark. So, implementing a method suggested by Vadim, I created the following patch that, the first time a query finds a committed row whose tmin value is not set, sets it, and marks the buffer where the row is stored as dirty. (It works for tmax, too.) This doesn't result in the boost in real time performance I was hoping for, however it does decrease backend CPU usage by up to two-thirds in certain situations, so it could be rather beneficial in high-concurrency settings.	29 years ago
Bruce Momjian	ac3c926c42	Fix typo in struct name.	29 years ago
Bruce Momjian	4eadf2d6cd	More autosize structure error checks.	29 years ago
Bruce Momjian	fa937b5e6b	Remove SB_PAD. Compute padding at compile time.	29 years ago
Vadim B. Mikheev	1c297d429e	No more LateWrite.	29 years ago
Bruce Momjian	4b2b8592a0	Compile and warning cleanup	30 years ago
Marc G. Fournier	66637f4a2f	Clean up Makefile ... Add #include "postgres.h" as required Remove #include "utils/elog.h"	30 years ago
Marc G. Fournier	d31084e9d1	Postgres95 1.01 Distribution - Virgin Sources	30 years ago