<p>RDS and Argus are closely integrated and provide complete performance monitoring service. You can view the resource usage of RDS PostgreSQL service with Argus service. The following is the detailed information of common monitoring items:</p> <table border="1" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="background-color:#ededed; vertical-align:top"> <p><strong>Parameter</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:150px"> <p><strong>Name</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:490px"> <p><strong>Description</strong></p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_connections_active</p> </td> <td style="vertical-align:top; width:150px"> <p>active connections</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the active connections of an instance. The unit is number.&nbsp;&nbsp;</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_connections_idle</p> </td> <td style="vertical-align:top; width:150px"> <p>idle connection</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the idle connections of an instance. The unit is number.&nbsp;</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_connections_idle_tx</p> </td> <td style="vertical-align:top; width:150px"> <p>idle tx connection</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the current idle transaction connections of an instance. The unit is number.</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_connections_total</p> </td> <td style="vertical-align:top; width:150px"> <p>total connection count</p> </td> <td style="vertical-align:top; width:490px"> <p>Maximum connections of an instance. The unit is number. Total connections = active connections + idle connections + idle transaction connections</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_connections_pct</p> </td> <td style="vertical-align:top; width:150px"> <p>connection used percent</p> </td> <td style="vertical-align:top; width:490px"> <p>It is the ratio of connection quantity to maximum connections. The unit is percentage (%). Total connection/Max connection</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_cpu_used</p> </td> <td style="vertical-align:top; width:150px"> <p>cup busy</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the CPU usage ratio of an instance. The unit is percentage (%).</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_men_used</p> </td> <td style="vertical-align:top; width:150px"> <p>memory used percent</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the memory usage ratio of an instance. The unit is percentage (%).</p> </td> </tr> <tr> <td style="vertical-align:top"> <p>pg_disk_used</p> </td> <td style="vertical-align:top; width:150px"> <p>disk used percent</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the disk usage ratio of an instance. The unit is percentage (%).</p> <p>Usage ratio of disk = total disk usage/storage specifications of an instance.</p> </td> </tr> <tr> <td> <p>pg_disk_used_total</p> </td> <td style="width:150px"> <p>total disk usage</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the total disk usage of an instance. The unit is GB.</p> <p>Total disk usage = data disk usage + WAL disk usage.</p> </td> </tr> <tr> <td> <p>pg_disk_used_data</p> </td> <td style="width:150px"> <p>data disk usage</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the data disk usage of an instance. The unit is GB.</p> </td> </tr> <tr> <td> <p>pg_disk_used_wal</p> </td> <td style="width:150px"> <p>wal disk usage</p> </td> <td style="vertical-align:top; width:490px"> <p>It counts the WAL disk usage of an instance. The unit is GB.</p> </td> </tr> <tr> <td> <p>pg_status</p> </td> <td style="width:150px"> <p>database usable</p> </td> <td style="vertical-align:top; width:490px"> <p>The value range of monitoring status of an RDS PostgreSQL instance is:</p> <p>&bull;&nbsp; 0: Instance connection is abnormal.</p> <p>&bull;&nbsp; 1: Instance connection is normal.</p> </td> </tr> <tr> <td> <p>pg_read_io_percent</p> </td> <td style="width:150px"> <p>io read percent</p> </td> <td style="vertical-align:top; width:490px"> <p>Read I/O of an instance = number of reads of the current instance per unit time/maximum IOPS.</p> </td> </tr> <tr> <td> <p>pg_read_mb_percent</p> </td> <td style="width:150px"> <p>read throughput</p> </td> <td style="vertical-align:top; width:490px"> <p>Read throughput of an instance = bits that are read of the instance per unit time/maximum bits that are read per unit time.</p> </td> </tr> <tr> <td> <p>pg_write_io_percent</p> </td> <td style="width:150px"> <p>io write percent</p> </td> <td style="vertical-align:top; width:490px"> <p>Write I/O of an instance = bits that are written of the instance per unit time/maximum IOPS.</p> </td> </tr> <tr> <td> <p>pg_write_mb_percent</p> </td> <td style="width:150px"> <p>write throughput</p> </td> <td style="vertical-align:top; width:490px"> <p>Write throughput of an instance = bits that are written of the instance per unit time/maximum bits that are written per unit time.</p> </td> </tr> </tbody> </table>