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Bruce Momjian 603e153bb8 I don't like last minute patches before the final freeze, but I believe that ... this one could be useful for people experiencing out-of-memory crashes while executing queries which retrieve or use a very large number of tuples. The problem happens when storage is allocated for functions results used in a large query, for example: select upper(name) from big_table; select big_table.array[1] from big_table; select count(upper(name)) from big_table; This patch is a dirty hack that fixes the out-of-memory problem for the most common cases, like the above ones. It is not the final solution for the problem but it can work for some people, so I'm posting it. The patch should be safe because all changes are under #ifdef. Furthermore the feature can be enabled or disabled at runtime by the `free_tuple_memory' options in the pg_options file. The option is disabled by default and must be explicitly enabled at runtime to have any effect. To enable the patch add the follwing line to Makefile.custom: CUSTOM_COPT += -DFREE_TUPLE_MEMORY To enable the option at runtime add the following line to pg_option: free_tuple_memory=1 Massimo		27 years ago
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access	I don't like last minute patches before the final freeze, but I believe that	27 years ago
bootstrap	pgindent run over code.	27 years ago
catalog	Turns out OIDNAMELEN wasn't really being used at all!	27 years ago
commands	Change Assert(Ptp.t_data->t_xmax == tp.t_data->t_xmin) to :	27 years ago
executor	I don't like last minute patches before the final freeze, but I believe that	27 years ago
lib	Ooops ... dllist.c can't use Assert() when it is compiled into	27 years ago
libpq	Add configurable option controlling security checks in LO functions.	27 years ago
main	Change my-function-name-- to my_function_name, and optimizer renames.	27 years ago
nodes	equal() needs a case for Aggref nodes, as shown by:	27 years ago
optimizer	Fix errors in SELECT ... GROUP BY ... UNION SELECT ...	27 years ago
parser	Repair recently-introduced error in makeIndexable for LIKE:	27 years ago
port	pgindent run over code.	27 years ago
postmaster	Add startup-time check that -B is not unreasonably small for	27 years ago
regex	pgindent run over code.	27 years ago
rewrite	Make functions static or NOT_USED as appropriate.	27 years ago
storage	Removed bad Assert(!buf->ri_lock) when unlocking exclusively	27 years ago
tcop	1. Run all pg_dump queries in single serializable transaction.	27 years ago
tioga	Another pgindent run. Sorry folks.	27 years ago
utils	I don't like last minute patches before the final freeze, but I believe that	27 years ago
Makefile	Export include/utils/mcxt.h so that external stuff can include	27 years ago