[pgpool-committers: 1890] pgpool: This is the penultimate patch for integration of memory and exc
Muhammad Usama
m.usama at gmail.com
Wed May 7 20:27:25 JST 2014
This is the penultimate patch for integration of memory and exception manager APIs into pgpool.
The commit is very large mainly because of replacing of pool_error(), pool_debug() and pool_log() function calls to ereport(ERROR,..) ereport(DEBUG,..) and ereport(LOG,..)
Below is the description of few areas changed by the commit
Some Important Memory Contexts
============================
ProcessLoopContext:
This context resets at every main loop iteration of a process
TopMemoryContext:
This context is same as PostgreSQL's TopMemoryContext and lives for a life time of process.
ErrorContext:
Same as PostgreSQL's ErrorContext and used for error processing.
QueryContext:
Used by pgpool child process and it lives for single query cycle.
Lifecycle of Important Objects
==============================
SessionContext:
The session context consists of a backend and frontend connection and it lives for a single iteration of main child process loop.
So the session context object is created in ProcessLoopContext.
ProcessContext:
ConnectionPool:
BackendConnection:
The above objects are required for the life of process hence are created in TopMemoryContext which lives throughout the process life time.
Child Frontend connection:
Frontend connection object is placed in the ProcessLoopContext since new frontend connection is created at every main loop iteration of pgpool child process.
PCP Frontend connection:
This object can live till the pcp process so the object for pcp frontend is created in TopMemoryContext.
new configuration parameters
===========================
The patch also adds three new configuration parameters to control the error reporting style and details.
Parameters names and their behaviours are borrowed from PostgreSQL.
int log_error_verbosity; /* controls how much detail about error should be emitted */
int client_min_messages; /*controls which message should be sent to client */
int log_min_messages; /*controls which message should be emitted to server log */
Some other notable changes introduced by the patch.
================================================
The patch changes the error reporting behaviour and now pgpool-II tries to send all the error and log messages to the connected frontend clients (controllable by "client_min_messages" configuration pa
The patch added an extra call back "on_system_exit" to the elog API, which is not present in the PostgreSQL.
Branches
--------
EXCEPTION_MGR
master
Details
-------
http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=551101226e1ba8b4feaca4ac4a01fcd4528f4c8a
Modified Files
--------------
Makefile.in | 376 ++--
aclocal.m4 | 617 ++---
configure | 1303 ++++++-----
doc/Makefile.in | 156 +-
doc/pgpool-en.html | 38 +
src/Makefile.am | 6 +-
src/Makefile.in | 462 ++--
src/auth/md5.c | 7 +-
src/auth/pool_auth.c | 513 ++---
src/auth/pool_hba.c | 387 ++--
src/config/pool_config.c | 271 ++-
src/config/pool_config.l | 197 +-
src/context/pool_query_context.c | 116 +-
src/context/pool_session_context.c | 41 +-
src/include/Makefile.in | 161 +-
src/include/context/pool_session_context.h | 2 +-
src/include/pcp/pcp_stream.h | 1 +
src/include/pool.h | 7 +-
src/include/pool_config.h | 3 +
src/include/protocol/pool_proto_modules.h | 4 +-
src/include/protocol/protocol_defs.h | 19 +
src/include/utils/elog.h | 15 +-
src/include/utils/memutils.h | 4 +-
src/include/utils/pool_stream.h | 3 +-
src/libs/Makefile.in | 275 ++-
src/libs/pcp/Makefile.am | 7 +-
src/libs/pcp/Makefile.in | 285 ++-
src/libs/pcp/pcp.c | 280 +--
src/libs/pcp/pcp_error.c | 87 -
src/libs/pcp/pcp_stream.c | 385 ----
src/main/main.c | 36 +-
src/main/pgpool_main.c | 405 ++--
src/parallel_query/pool_rewrite_query.c | 241 +-
src/parser/Makefile.in | 291 ++-
src/parser/gram.c | 2989 ++++++++++++++++++++-----
src/parser/pool_string.c | 27 -
src/parser/scan.c | 72 +-
src/pcp_con/pcp_child.c | 10 +-
src/protocol/child.c | 437 ++--
src/protocol/pool_connection_pool.c | 91 +-
src/protocol/pool_process_query.c | 1393 ++++++------
src/protocol/pool_proto2.c | 134 +-
src/protocol/pool_proto_modules.c | 704 ++----
src/query_cache/pool_memqcache.c | 189 +-
src/rewrite/pool_lobj.c | 1 +
src/sample/pgpool.conf | 27 +
src/sample/pgpool.conf.sample | 26 +
src/sample/pgpool.conf.sample-master-slave | 26 +
src/sample/pgpool.conf.sample-replication | 26 +
src/sample/pgpool.conf.sample-stream | 26 +
src/streaming_replication/pool_worker_child.c | 4 +-
src/system_db/pool_system.c | 161 +-
src/test/pgpool_setup | 2 +-
src/tools/Makefile.in | 275 ++-
src/tools/pcp/Makefile.am | 26 +-
src/tools/pcp/Makefile.in | 348 ++-
src/tools/pgmd5/Makefile.in | 350 +--
src/utils/error/elog.c | 366 +--
src/utils/mmgr/mcxt.c | 8 +-
src/utils/pcp/pcp_error.c | 87 +
src/utils/pcp/pcp_stream.c | 392 ++++
src/utils/pcp/pcp_timeout.c | 12 +
src/utils/pool_error.c | 2 +-
src/utils/pool_params.c | 65 +-
src/utils/pool_process_reporting.c | 37 +-
src/utils/pool_select_walker.c | 14 +-
src/utils/pool_stream.c | 324 +--
src/utils/ps_status.c | 1 +
src/watchdog/Makefile.in | 229 +-
src/watchdog/watchdog.c | 14 +-
70 files changed, 9325 insertions(+), 6571 deletions(-)
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