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Add backend type to csvlog and optionally log_line_prefix

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The backend type, which corresponds to what
pg_stat_activity.backend_type shows, is added as a column to the
csvlog and can optionally be added to log_line_prefix using the new %b
placeholder.

Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Kuntal Ghosh <kuntalghosh.2007@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@2ndquadrant.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://www.postgresql.org/message-id/flat/c65e5196-4f04-4ead-9353-6088c19615a3@2ndquadrant.com
This commit is contained in:
Peter Eisentraut
2020-03-15 11:20:21 +01:00
parent d8cfa82d51
commit 70a7b4776b
4 changed files with 49 additions and 2 deletions
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28
src/backend/utils/error/elog.c
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@@ -72,6 +72,7 @@
#include "libpq/pqformat.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "postmaster/bgworker.h"
#include "postmaster/postmaster.h"
#include "postmaster/syslogger.h"
#include "storage/ipc.h"
@@ -2492,6 +2493,23 @@ log_line_prefix(StringInfo buf, ErrorData *edata)
padding > 0 ? padding : -padding);
break;
case 'b':
{
const char *backend_type_str;
if (MyProcPid == PostmasterPid)
backend_type_str = "postmaster";
else if (MyBackendType == B_BG_WORKER)
backend_type_str = MyBgworkerEntry->bgw_type;
else
backend_type_str = GetBackendTypeDesc(MyBackendType);
if (padding != 0)
appendStringInfo(buf, "%*s", padding, backend_type_str);
else
appendStringInfoString(buf, backend_type_str);
break;
}
case 'u':
if (MyProcPort)
{
@@ -2920,6 +2938,16 @@ write_csvlog(ErrorData *edata)
if (application_name)
appendCSVLiteral(&buf, application_name);
appendStringInfoChar(&buf, ',');
/* backend type */
if (MyProcPid == PostmasterPid)
appendCSVLiteral(&buf, "postmaster");
else if (MyBackendType == B_BG_WORKER)
appendCSVLiteral(&buf, MyBgworkerEntry->bgw_type);
else
appendCSVLiteral(&buf, GetBackendTypeDesc(MyBackendType));
appendStringInfoChar(&buf, '\n');
/* If in the syslogger process, try to write messages direct to file */