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A few changes from repmgrd and improve the SQL of the repl_status

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view in order to actually show something useful
This commit is contained in:
Jaime Casanova
2010-10-01 02:26:39 -05:00
parent 533a4e31a0
commit 863a3fab53
2 changed files with 36 additions and 20 deletions
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22
repmgr.sql
View File

@@ -26,11 +26,23 @@ CREATE TABLE repl_monitor (
/*
* A useful view
* This view shows the latest monitor info about every node.
* Interesting thing to see:
* replication_lag: in bytes (this is how far the latest xlog record
* we have received is from master)
* apply_lag: in bytes (this is how far the latest xlog record
* we have applied is from the latest record we
* have received)
* time-lag: how many seconds are we from being up-to-date with master
*/
drop view if exists repl_status;
CREATE VIEW repl_status AS
SELECT *, now() - (select max(last_monitor_time) from repl_monitor b
where b.primary_node = a.primary_node
and b.standby_node = a.standby_node)
FROM repl_monitor a;
WITH monitor_info AS (SELECT *, ROW_NUMBER() OVER (PARTITION BY primary_node, standby_node
ORDER BY last_monitor_time desc)
FROM repl_monitor)
SELECT primary_node, standby_node, last_monitor_time, last_wal_primary_location,
last_wal_standby_location, pg_size_pretty(replication_lag) replication_lag,
pg_size_pretty(apply_lag) apply_lag,
age(now(), last_monitor_time) AS time_lag
FROM monitor_info a
WHERE row_number = 1;

34
repmgrd.c
View File

@@ -33,14 +33,14 @@ bool verbose = false;
static void help(const char *progname);
void checkClusterConfiguration(void);
void checkNodeConfiguration(char *conninfo);
void getPrimaryConnection(void);
static void checkClusterConfiguration(void);
static void checkNodeConfiguration(char *conninfo);
static void getPrimaryConnection(void);
void MonitorCheck(void);
void MonitorExecute(void);
static void MonitorCheck(void);
static void MonitorExecute(void);
unsigned long long int walLocationToBytes(char *wal_location);
static unsigned long long int walLocationToBytes(char *wal_location);
int
@@ -111,6 +111,13 @@ main(int argc, char **argv)
* and start monitor
*/
myLocalMode = is_standby(myLocalConn) ? STANDBY_MODE : PRIMARY_MODE;
if (myLocalMode == PRIMARY_MODE)
{
primaryId = myLocalId;
strcpy(primaryConninfo, conninfo);
primaryConn = myLocalConn;
}
checkClusterConfiguration();
checkNodeConfiguration(conninfo);
if (myLocalMode == STANDBY_MODE)
@@ -132,9 +139,7 @@ main(int argc, char **argv)
* This function ask if we are in recovery, if false we are the primary else
* we are a standby
*/
void
static void
getPrimaryConnection(void)
{
PGresult *res1;
@@ -199,7 +204,7 @@ getPrimaryConnection(void)
}
void
static void
MonitorCheck(void) {
/*
* Every 3 seconds, insert monitor info
@@ -215,8 +220,7 @@ MonitorCheck(void) {
/*
* Check if its time for next monitor call and if so, do it.
*/
void
static void
MonitorExecute(void)
{
PGresult *res;
@@ -291,7 +295,7 @@ MonitorExecute(void)
}
void
static void
checkClusterConfiguration(void)
{
PGresult *res;
@@ -324,7 +328,7 @@ checkClusterConfiguration(void)
}
void
static void
checkNodeConfiguration(char *conninfo)
{
PGresult *res;
@@ -372,7 +376,7 @@ checkNodeConfiguration(char *conninfo)
}
unsigned long long int
static unsigned long long int
walLocationToBytes(char *wal_location)
{
unsigned int xlogid;