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Add client_hostname field to pg_stat_activity.

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Peter Eisentraut, reviewed by Steve Singer, Alvaro Herrera, and me.
This commit is contained in:
Robert Haas
2011-02-17 16:03:28 -05:00
parent a3e8486dff
commit 4a25bc145a
8 changed files with 69 additions and 23 deletions
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28
src/backend/postmaster/pgstat.c
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@@ -2223,6 +2223,7 @@ pgstat_fetch_global(void)
static PgBackendStatus *BackendStatusArray = NULL;
static PgBackendStatus *MyBEEntry = NULL;
static char *BackendClientHostnameBuffer = NULL;
static char *BackendAppnameBuffer = NULL;
static char *BackendActivityBuffer = NULL;
@@ -2240,11 +2241,13 @@ BackendStatusShmemSize(void)
mul_size(NAMEDATALEN, MaxBackends));
size = add_size(size,
mul_size(pgstat_track_activity_query_size, MaxBackends));
size = add_size(size,
mul_size(NAMEDATALEN, MaxBackends));
return size;
}
/*
* Initialize the shared status array and activity/appname string buffers
* Initialize the shared status array and several string buffers
* during postmaster startup.
*/
void
@@ -2286,6 +2289,24 @@ CreateSharedBackendStatus(void)
}
}
/* Create or attach to the shared client hostname buffer */
size = mul_size(NAMEDATALEN, MaxBackends);
BackendClientHostnameBuffer = (char *)
ShmemInitStruct("Backend Client Host Name Buffer", size, &found);
if (!found)
{
MemSet(BackendClientHostnameBuffer, 0, size);
/* Initialize st_clienthostname pointers. */
buffer = BackendClientHostnameBuffer;
for (i = 0; i < MaxBackends; i++)
{
BackendStatusArray[i].st_clienthostname = buffer;
buffer += NAMEDATALEN;
}
}
/* Create or attach to the shared activity buffer */
size = mul_size(pgstat_track_activity_query_size, MaxBackends);
BackendActivityBuffer = (char *)
@@ -2386,16 +2407,21 @@ pgstat_bestart(void)
beentry->st_databaseid = MyDatabaseId;
beentry->st_userid = userid;
beentry->st_clientaddr = clientaddr;
beentry->st_clienthostname[0] = '\0';
beentry->st_waiting = false;
beentry->st_appname[0] = '\0';
beentry->st_activity[0] = '\0';
/* Also make sure the last byte in each string area is always 0 */
beentry->st_clienthostname[NAMEDATALEN - 1] = '\0';
beentry->st_appname[NAMEDATALEN - 1] = '\0';
beentry->st_activity[pgstat_track_activity_query_size - 1] = '\0';
beentry->st_changecount++;
Assert((beentry->st_changecount & 1) == 0);
if (MyProcPort && MyProcPort->remote_hostname)
strlcpy(beentry->st_clienthostname, MyProcPort->remote_hostname, NAMEDATALEN);
/* Update app name to current GUC setting */
if (application_name)
pgstat_report_appname(application_name);