open-dsi
/
postgres
mirror of https://github.com/postgres/postgres
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Adjust pgstat message definitions so that the target message size is

Browse Source 
specified in just one place and adhered to exactly, rather than just more
or less.  A side effect is to increase PGSTAT_ACTIVITY_SIZE (maximum
reported query length) from 256 to nearly 1000.
REL8_0_STABLE
Tom Lane 22 years ago
parent b2ca707746
commit 0ceeb4cbbe
2 changed files with 139 additions and 149 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 49
      src/backend/postmaster/pgstat.c
  2. 239
      src/include/pgstat.h

49
src/backend/postmaster/pgstat.c
Unescape View File

@ -13,7 +13,7 @@
*
* Copyright (c) 2001-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.75 2004/06/14 18:08:18 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.76 2004/06/26 16:32:02 tgl Exp $
* ----------
*/
#include "postgres.h"
@ -22,12 +22,10 @@
#include <fcntl.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <signal.h>
#include <time.h>
@ -55,6 +53,47 @@
#include "utils/syscache.h"
/* ----------
* Paths for the statistics files. The %s is replaced with the
* installation's $PGDATA.
* ----------
*/
#define PGSTAT_STAT_FILENAME "%s/global/pgstat.stat"
#define PGSTAT_STAT_TMPFILE "%s/global/pgstat.tmp.%d"
/* ----------
* Timer definitions.
* ----------
*/
#define PGSTAT_STAT_INTERVAL 500 /* How often to write the status
* file; in milliseconds. */
#define PGSTAT_DESTROY_DELAY 10000 /* How long to keep destroyed
* objects known, to give delayed
* UDP packets time to arrive;
* in milliseconds. */
#define PGSTAT_DESTROY_COUNT (PGSTAT_DESTROY_DELAY / PGSTAT_STAT_INTERVAL)
#define PGSTAT_RESTART_INTERVAL 60 /* How often to attempt to restart
* a failed statistics collector;
* in seconds. */
/* ----------
* Amount of space reserved in pgstat_recvbuffer().
* ----------
*/
#define PGSTAT_RECVBUFFERSZ ((int) (1024 * sizeof(PgStat_Msg)))
/* ----------
* The initial size hints for the hash tables used in the collector.
* ----------
*/
#define PGSTAT_DB_HASH_SIZE 16
#define PGSTAT_BE_HASH_SIZE 512
#define PGSTAT_TAB_HASH_SIZE 512
/* ----------
* GUC parameters
* ----------
@ -2760,7 +2799,7 @@ pgstat_recv_activity(PgStat_MsgActivity *msg, int len)
/*
* Here we check explicitly for 0 return, since we don't want to
* mangle the activity of an active backend by a delayed packed from a
* mangle the activity of an active backend by a delayed packet from a
* dead one.
*/
if (pgstat_add_backend(&msg->m_hdr) != 0)
@ -2768,7 +2807,7 @@ pgstat_recv_activity(PgStat_MsgActivity *msg, int len)
entry = &(pgStatBeTable[msg->m_hdr.m_backendid - 1]);
strncpy(entry->activity, msg->m_what, PGSTAT_ACTIVITY_SIZE);
StrNCpy(entry->activity, msg->m_what, PGSTAT_ACTIVITY_SIZE);
entry->activity_start_sec =
GetCurrentAbsoluteTimeUsec(&entry->activity_start_usec);

239
src/include/pgstat.h
Unescape View File

@ -5,7 +5,7 @@
*
* Copyright (c) 2001-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.24 2004/06/14 18:08:19 tgl Exp $
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.25 2004/06/26 16:32:04 tgl Exp $
* ----------
*/
#ifndef PGSTAT_H
@ -16,38 +16,6 @@
#include "utils/rel.h"
/* ----------
* Paths for the statistics files. The %s is replaced with the
* installations $PGDATA.
* ----------
*/
#define PGSTAT_STAT_FILENAME "%s/global/pgstat.stat"
#define PGSTAT_STAT_TMPFILE "%s/global/pgstat.tmp.%d"
/* ----------
* Timer definitions.
* ----------
*/
#define PGSTAT_STAT_INTERVAL 500 /* How often to write the status */
/* file; in milliseconds. */
#define PGSTAT_DESTROY_DELAY 10000 /* How long to keep destroyed */
/* objects known, to give delayed */
/* UDP packets time to arrive; */
/* in milliseconds. */
#define PGSTAT_DESTROY_COUNT (PGSTAT_DESTROY_DELAY / PGSTAT_STAT_INTERVAL)
#define PGSTAT_RESTART_INTERVAL 60 /* How often to attempt to restart */
/* a failed statistics collector; in seconds. */
/* ----------
* How much of the actual query string to send to the collector.
* ----------
*/
#define PGSTAT_ACTIVITY_SIZE 256
/* ----------
* The types of backend/postmaster -> collector messages
* ----------
@ -61,22 +29,6 @@
#define PGSTAT_MTYPE_DROPDB 6
#define PGSTAT_MTYPE_RESETCOUNTER 7
/* ----------
* Amount of space reserved in pgstat_recvbuffer().
* ----------
*/
#define PGSTAT_RECVBUFFERSZ ((int) (1024 * sizeof(PgStat_Msg)))
/* ----------
* The initial size hints for the hash tables used in the collector.
* ----------
*/
#define PGSTAT_DB_HASH_SIZE 16
#define PGSTAT_BE_HASH_SIZE 512
#define PGSTAT_TAB_HASH_SIZE 512
/* ----------
* The data type used for counters.
* ----------
@ -84,82 +36,6 @@
typedef int64 PgStat_Counter;
/* ------------------------------------------------------------
* Statistic collector data structures follow
* ------------------------------------------------------------
*/
/* ----------
* PgStat_StatDBEntry The collectors data per database
* ----------
*/
typedef struct PgStat_StatDBEntry
{
Oid databaseid;
HTAB *tables;
int n_backends;
PgStat_Counter n_connects;
PgStat_Counter n_xact_commit;
PgStat_Counter n_xact_rollback;
PgStat_Counter n_blocks_fetched;
PgStat_Counter n_blocks_hit;
int destroy;
} PgStat_StatDBEntry;
/* ----------
* PgStat_StatBeEntry The collectors data per backend
* ----------
*/
typedef struct PgStat_StatBeEntry
{
Oid databaseid;
Oid userid;
int procpid;
char activity[PGSTAT_ACTIVITY_SIZE];
AbsoluteTime activity_start_sec;
int activity_start_usec;
} PgStat_StatBeEntry;
/* ----------
* PgStat_StatBeDead Because UDP packets can arrive out of
* order, we need to keep some information
* about backends that are known to be
* dead for some seconds. This info is held
* in a hash table of these structs.
* ----------
*/
typedef struct PgStat_StatBeDead
{
int procpid;
int backendid;
int destroy;
} PgStat_StatBeDead;
/* ----------
* PgStat_StatTabEntry The collectors data table data
* ----------
*/
typedef struct PgStat_StatTabEntry
{
Oid tableid;
PgStat_Counter numscans;
PgStat_Counter tuples_returned;
PgStat_Counter tuples_fetched;
PgStat_Counter tuples_inserted;
PgStat_Counter tuples_updated;
PgStat_Counter tuples_deleted;
PgStat_Counter blocks_fetched;
PgStat_Counter blocks_hit;
int destroy;
} PgStat_StatTabEntry;
/* ------------------------------------------------------------
* Message formats follow
* ------------------------------------------------------------
@ -181,7 +57,15 @@ typedef struct PgStat_MsgHdr
} PgStat_MsgHdr;
/* ----------
* PgStat_TabEntry A table slot in a MsgTabstat
* Space available in a message. This will keep the UDP packets below 1K,
* which should fit unfragmented into the MTU of the lo interface on most
* platforms. Does anybody care for platforms where it doesn't?
* ----------
*/
#define PGSTAT_MSG_PAYLOAD (1000 - sizeof(PgStat_MsgHdr))
/* ----------
* PgStat_TableEntry Per-table info in a MsgTabstat
* ----------
*/
typedef struct PgStat_TableEntry
@ -234,27 +118,22 @@ typedef struct PgStat_MsgBeterm
* to parse a query.
* ----------
*/
#define PGSTAT_ACTIVITY_SIZE PGSTAT_MSG_PAYLOAD
typedef struct PgStat_MsgActivity
{
PgStat_MsgHdr m_hdr;
char m_what[PGSTAT_ACTIVITY_SIZE];
} PgStat_MsgActivity;
/* ----------
* How many table entries fit into a MsgTabstat. Actually,
* this will keep the UDP packets below 1K, what should fit
* unfragmented into the MTU of the lo interface on most
* platforms. Does anybody care for platforms where it doesn't?
* ----------
*/
#define PGSTAT_NUM_TABENTRIES ((1000 - sizeof(PgStat_MsgHdr)) \
/ sizeof(PgStat_TableEntry))
/* ----------
* PgStat_MsgTabstat Sent by the backend to report table
* and buffer access statistics.
* ----------
*/
#define PGSTAT_NUM_TABENTRIES ((PGSTAT_MSG_PAYLOAD - 3 * sizeof(int)) \
/ sizeof(PgStat_TableEntry))
typedef struct PgStat_MsgTabstat
{
PgStat_MsgHdr m_hdr;
@ -264,19 +143,14 @@ typedef struct PgStat_MsgTabstat
PgStat_TableEntry m_entry[PGSTAT_NUM_TABENTRIES];
} PgStat_MsgTabstat;
/* ----------
* How many Oid entries fit into a MsgTabpurge.
* ----------
*/
#define PGSTAT_NUM_TABPURGE ((1000 - sizeof(PgStat_MsgHdr)) \
/ sizeof(Oid))
/* ----------
* PgStat_MsgTabpurge Sent by the backend to tell the collector
* about dead tables.
* ----------
*/
#define PGSTAT_NUM_TABPURGE ((PGSTAT_MSG_PAYLOAD - sizeof(int)) \
/ sizeof(Oid))
typedef struct PgStat_MsgTabpurge
{
PgStat_MsgHdr m_hdr;
@ -325,6 +199,83 @@ typedef union PgStat_Msg
} PgStat_Msg;
/* ------------------------------------------------------------
* Statistic collector data structures follow
* ------------------------------------------------------------
*/
/* ----------
* PgStat_StatDBEntry The collectors data per database
* ----------
*/
typedef struct PgStat_StatDBEntry
{
Oid databaseid;
HTAB *tables;
int n_backends;
PgStat_Counter n_connects;
PgStat_Counter n_xact_commit;
PgStat_Counter n_xact_rollback;
PgStat_Counter n_blocks_fetched;
PgStat_Counter n_blocks_hit;
int destroy;
} PgStat_StatDBEntry;
/* ----------
* PgStat_StatBeEntry The collectors data per backend
* ----------
*/
typedef struct PgStat_StatBeEntry
{
Oid databaseid;
Oid userid;
int procpid;
AbsoluteTime activity_start_sec;
int activity_start_usec;
char activity[PGSTAT_ACTIVITY_SIZE];
} PgStat_StatBeEntry;
/* ----------
* PgStat_StatBeDead Because UDP packets can arrive out of
* order, we need to keep some information
* about backends that are known to be
* dead for some seconds. This info is held
* in a hash table of these structs.
* ----------
*/
typedef struct PgStat_StatBeDead
{
int procpid;
int backendid;
int destroy;
} PgStat_StatBeDead;
/* ----------
* PgStat_StatTabEntry The collectors data table data
* ----------
*/
typedef struct PgStat_StatTabEntry
{
Oid tableid;
PgStat_Counter numscans;
PgStat_Counter tuples_returned;
PgStat_Counter tuples_fetched;
PgStat_Counter tuples_inserted;
PgStat_Counter tuples_updated;
PgStat_Counter tuples_deleted;
PgStat_Counter blocks_fetched;
PgStat_Counter blocks_hit;
int destroy;
} PgStat_StatTabEntry;
/* ----------
* GUC parameters
* ----------

Write Preview
Loading…
Cancel
Save