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MXS-1865 Update server version only when (re)connecting

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Updating it every iteration is needless.
This commit is contained in:
Esa Korhonen
2018-05-11 16:38:56 +03:00
parent 95815df1db
commit b29bae6e84
10 changed files with 101 additions and 76 deletions
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82
server/modules/monitor/mariadbmon/mariadbserver.cc
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@ -685,10 +685,18 @@ void MariaDBServer::monitor_server(MXS_MONITOR* base_monitor)
SERVER* srv = mon_srv->server;
MYSQL* conn = mon_srv->con; // mon_ping_or_connect_to_db() may have reallocated the MYSQL struct.
if (rval == MONITOR_CONN_OK)
if (mon_connection_is_ok(rval))
{
server_clear_status_nolock(srv, SERVER_AUTH_ERROR);
monitor_clear_pending_status(mon_srv, SERVER_AUTH_ERROR);
/* Store current status in both server and monitor server pending struct */
server_set_status_nolock(srv, SERVER_RUNNING);
monitor_set_pending_status(mon_srv, SERVER_RUNNING);
if (rval == MONITOR_CONN_NEWCONN_OK)
{
update_server_info();
}
}
else
{
@ -713,39 +721,6 @@ void MariaDBServer::monitor_server(MXS_MONITOR* base_monitor)
return;
}
/* Store current status in both server and monitor server pending struct */
server_set_status_nolock(srv, SERVER_RUNNING);
monitor_set_pending_status(mon_srv, SERVER_RUNNING);
/* Check whether current server is MaxScale Binlog Server */
MYSQL_RES *result;
if (mxs_mysql_query(conn, "SELECT @@maxscale_version") == 0 &&
(result = mysql_store_result(conn)) != NULL)
{
m_binlog_relay = true;
mysql_free_result(result);
}
else
{
m_binlog_relay = false;
}
/* Get server version string, also get/set numeric representation. */
mxs_mysql_set_server_version(conn, srv);
/* Set monitor version enum. */
uint64_t version_num = server_get_version(srv);
if (version_num >= 100000)
{
m_version = MariaDBServer::MARIADB_VERSION_100;
}
else if (version_num >= 5 * 10000 + 5 * 100)
{
m_version = MariaDBServer::MARIADB_VERSION_55;
}
else
{
m_version = MariaDBServer::MARIADB_VERSION_UNKNOWN;
}
/* Query a few settings. */
read_server_variables();
/* If gtid domain exists and server is 10.0, update gtid:s */
@ -790,6 +765,45 @@ void MariaDBServer::update_slave_status()
}
}
/**
* Update information which changes rarely. This method should be called after (re)connecting to a backend.
* Calling this every monitoring loop is overkill.
*/
void MariaDBServer::update_server_info()
{
auto conn = m_server_base->con;
// Check whether this server is a MaxScale Binlog Server.
MYSQL_RES *result;
if (mxs_mysql_query(conn, "SELECT @@maxscale_version") == 0 &&
(result = mysql_store_result(conn)) != NULL)
{
m_binlog_relay = true;
mysql_free_result(result);
}
else
{
m_binlog_relay = false;
}
/* Get server version string, also get/set numeric representation. These functions do not actually
* query the server, since the data was obtained when connecting. */
mxs_mysql_set_server_version(conn, m_server_base->server);
/* Set monitor version enum. */
uint64_t version_num = server_get_version(m_server_base->server);
if (version_num >= 100000)
{
m_version = MariaDBServer::MARIADB_VERSION_100;
}
else if (version_num >= 5 * 10000 + 5 * 100)
{
m_version = MariaDBServer::MARIADB_VERSION_55;
}
else
{
m_version = MariaDBServer::MARIADB_VERSION_UNKNOWN;
}
}
SlaveStatus::slave_io_running_t SlaveStatus::slave_io_from_string(const std::string& str)
{
slave_io_running_t rval = SLAVE_IO_NO;