1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*-------------------------------------------------------------------------
*
* standbydesc.c
* rmgr descriptor routines for storage/ipc/standby.c
*
* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/standbydesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "storage/standby.h"
static void
standby_desc_running_xacts(StringInfo buf, xl_running_xacts *xlrec)
{
int i;
appendStringInfo(buf, "nextXid %u latestCompletedXid %u oldestRunningXid %u",
xlrec->nextXid,
xlrec->latestCompletedXid,
xlrec->oldestRunningXid);
if (xlrec->xcnt > 0)
{
appendStringInfo(buf, "; %d xacts:", xlrec->xcnt);
for (i = 0; i < xlrec->xcnt; i++)
appendStringInfo(buf, " %u", xlrec->xids[i]);
}
if (xlrec->subxid_overflow)
appendStringInfoString(buf, "; subxid ovf");
}
void
standby_desc(StringInfo buf, XLogRecord *record)
{
char *rec = XLogRecGetData(record);
uint8 info = record->xl_info & ~XLR_INFO_MASK;
if (info == XLOG_STANDBY_LOCK)
{
xl_standby_locks *xlrec = (xl_standby_locks *) rec;
int i;
for (i = 0; i < xlrec->nlocks; i++)
appendStringInfo(buf, "xid %u db %u rel %u ",
xlrec->locks[i].xid, xlrec->locks[i].dbOid,
xlrec->locks[i].relOid);
}
else if (info == XLOG_RUNNING_XACTS)
{
xl_running_xacts *xlrec = (xl_running_xacts *) rec;
standby_desc_running_xacts(buf, xlrec);
}
}
const char *
standby_identify(uint8 info)
{
const char *id = NULL;
switch (info)
{
case XLOG_STANDBY_LOCK:
id = "LOCK";
break;
case XLOG_RUNNING_XACTS:
id = "RUNNING_XACTS";
break;
}
return id;
}
|
