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/*-------------------------------------------------------------------------
*
* xlogdesc.c
* rmgr descriptor routines for access/transam/xlog.c
*
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/xlogdesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/xlog.h"
#include "access/xlog_internal.h"
#include "catalog/pg_control.h"
#include "utils/guc.h"
#include "utils/timestamp.h"
/*
* GUC support
*/
const struct config_enum_entry wal_level_options[] = {
{"minimal", WAL_LEVEL_MINIMAL, false},
{"archive", WAL_LEVEL_ARCHIVE, false},
{"hot_standby", WAL_LEVEL_HOT_STANDBY, false},
{NULL, 0, false}
};
void
xlog_desc(StringInfo buf, uint8 xl_info, char *rec)
{
uint8 info = xl_info & ~XLR_INFO_MASK;
if (info == XLOG_CHECKPOINT_SHUTDOWN ||
info == XLOG_CHECKPOINT_ONLINE)
{
CheckPoint *checkpoint = (CheckPoint *) rec;
appendStringInfo(buf, "checkpoint: redo %X/%X; "
"tli %u; prev tli %u; fpw %s; xid %u/%u; oid %u; multi %u; offset %u; "
"oldest xid %u in DB %u; oldest multi %u in DB %u; "
"oldest running xid %u; %s",
(uint32) (checkpoint->redo >> 32), (uint32) checkpoint->redo,
checkpoint->ThisTimeLineID,
checkpoint->PrevTimeLineID,
checkpoint->fullPageWrites ? "true" : "false",
checkpoint->nextXidEpoch, checkpoint->nextXid,
checkpoint->nextOid,
checkpoint->nextMulti,
checkpoint->nextMultiOffset,
checkpoint->oldestXid,
checkpoint->oldestXidDB,
checkpoint->oldestMulti,
checkpoint->oldestMultiDB,
checkpoint->oldestActiveXid,
(info == XLOG_CHECKPOINT_SHUTDOWN) ? "shutdown" : "online");
}
else if (info == XLOG_NOOP)
{
appendStringInfo(buf, "xlog no-op");
}
else if (info == XLOG_NEXTOID)
{
Oid nextOid;
memcpy(&nextOid, rec, sizeof(Oid));
appendStringInfo(buf, "nextOid: %u", nextOid);
}
else if (info == XLOG_SWITCH)
{
appendStringInfo(buf, "xlog switch");
}
else if (info == XLOG_RESTORE_POINT)
{
xl_restore_point *xlrec = (xl_restore_point *) rec;
appendStringInfo(buf, "restore point: %s", xlrec->rp_name);
}
else if (info == XLOG_BACKUP_END)
{
XLogRecPtr startpoint;
memcpy(&startpoint, rec, sizeof(XLogRecPtr));
appendStringInfo(buf, "backup end: %X/%X",
(uint32) (startpoint >> 32), (uint32) startpoint);
}
else if (info == XLOG_PARAMETER_CHANGE)
{
xl_parameter_change xlrec;
const char *wal_level_str;
const struct config_enum_entry *entry;
memcpy(&xlrec, rec, sizeof(xl_parameter_change));
/* Find a string representation for wal_level */
wal_level_str = "?";
for (entry = wal_level_options; entry->name; entry++)
{
if (entry->val == xlrec.wal_level)
{
wal_level_str = entry->name;
break;
}
}
appendStringInfo(buf, "parameter change: max_connections=%d max_prepared_xacts=%d max_locks_per_xact=%d wal_level=%s",
xlrec.MaxConnections,
xlrec.max_prepared_xacts,
xlrec.max_locks_per_xact,
wal_level_str);
}
else if (info == XLOG_FPW_CHANGE)
{
bool fpw;
memcpy(&fpw, rec, sizeof(bool));
appendStringInfo(buf, "full_page_writes: %s", fpw ? "true" : "false");
}
else if (info == XLOG_END_OF_RECOVERY)
{
xl_end_of_recovery xlrec;
memcpy(&xlrec, rec, sizeof(xl_end_of_recovery));
appendStringInfo(buf, "end_of_recovery: tli %u; prev tli %u; time %s",
xlrec.ThisTimeLineID, xlrec.PrevTimeLineID,
timestamptz_to_str(xlrec.end_time));
}
else
appendStringInfo(buf, "UNKNOWN");
}
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