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In v11, disable JIT by default (it's still enabled by default in HEAD).

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Per discussion, JIT isn't quite mature enough to ship enabled-by-default.

I failed to resist the temptation to do a bunch of copy-editing on the
related documentation.  Also, clean up some inconsistencies in which
section of config.sgml the JIT GUCs are documented in vs. what guc.c
and postgresql.config.sample had.

Discussion: https://postgr.es/m/20180914222657.mw25esrzbcnu6qlu@alap3.anarazel.de
This commit is contained in:
Tom Lane
2018-09-15 17:24:35 -04:00
parent f13e2d1cec
commit 0fdadfb019
6 changed files with 152 additions and 155 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/backend/jit/jit.c
View File

@ -32,8 +32,8 @@
/* GUCs */
bool jit_enabled = true;
char *jit_provider = "llvmjit";
bool jit_enabled = false;
char *jit_provider = NULL;
bool jit_debugging_support = false;
bool jit_dump_bitcode = false;
bool jit_expressions = true;

4
src/backend/utils/misc/guc.c
View File

@ -1752,7 +1752,7 @@ static struct config_bool ConfigureNamesBool[] =
NULL
},
&jit_enabled,
true,
false,
NULL, NULL, NULL
},
@ -3872,7 +3872,7 @@ static struct config_string ConfigureNamesString[] =
},
{
{"jit_provider", PGC_POSTMASTER, FILE_LOCATIONS,
{"jit_provider", PGC_POSTMASTER, CLIENT_CONN_PRELOAD,
gettext_noop("JIT provider to use."),
NULL,
GUC_SUPERUSER_ONLY

15
src/backend/utils/misc/postgresql.conf.sample
View File

@ -321,11 +321,12 @@
#parallel_setup_cost = 1000.0 # same scale as above
#jit_above_cost = 100000 # perform JIT compilation if available
# and query more expensive, -1 disables
#jit_optimize_above_cost = 500000 # optimize JITed functions if query is
# more expensive, -1 disables
#jit_inline_above_cost = 500000 # attempt to inline operators and
# functions if query is more expensive,
# and query more expensive than this;
# -1 disables
#jit_inline_above_cost = 500000 # inline small functions if query is
# more expensive than this; -1 disables
#jit_optimize_above_cost = 500000 # use expensive JIT optimizations if
# query is more expensive than this;
# -1 disables
#min_parallel_table_scan_size = 8MB
@ -351,6 +352,7 @@
#join_collapse_limit = 8 # 1 disables collapsing of explicit
# JOIN clauses
#force_parallel_mode = off
#jit = off # allow JIT compilation
#------------------------------------------------------------------------------
@ -615,13 +617,12 @@
#shared_preload_libraries = '' # (change requires restart)
#local_preload_libraries = ''
#session_preload_libraries = ''
#jit_provider = 'llvmjit' # JIT library to use
# - Other Defaults -
#dynamic_library_path = '$libdir'
#jit = on # allow JIT compilation
#jit_provider = 'llvmjit' # JIT implementation to use
#------------------------------------------------------------------------------
# LOCK MANAGEMENT