<div dir="ltr"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt" id="docs-internal-guid-bdd666ee-7d5a-cdbe-e9a1-cf426a4534f4"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Hello, Stackers.</span></p>
<br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">    </span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">I’d like to start thread related to Monitoring of provisioned resources.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Taking a look at production-ready solutions for monitoring shows us that almost all this systems are requiring plugin/agent deployment to provide online server monitoring, up-to-date statistics, etc.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">    </span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Monitoring question was raised at previous design summit, but there no discussions, proposals were made.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">    </span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">I’d like to start discussion related to in-VM Database monitoring. <br>
</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">For now trove-guestagent sends its status once it’s being modified. For monitoring perspective this type of reporting covers only availability/accessibility of deployed database.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">    </span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">But what about other metrics? After certain research i’ve collected next abstract set of metrics and its units for databases:</span></p>
<br><div dir="ltr" style="margin-left:0pt"><table style="border:medium none;border-collapse:collapse"><colgroup><col width="251"><col width="373"></colgroup><tbody><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">CPUUtilization</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The percentage of CPU utilization.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Percent</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">DatabaseConnections</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The number of database connections in use.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Count</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">DiskQueueDepth</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The number of outstanding IOs (read/write requests) waiting to access the disk.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Count</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">FreeableMemory</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The amount of available random access memory.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">FreeStorageSpace</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The amount of available storage space.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">SwapUsage</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The amount of swap space used on the DB Instance.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">ReadIOPS</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average number of disk I/O operations per second.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Count/Second</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">WriteIOPS</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average number of disk I/O operations per second.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Count/Second</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">ReadLatency</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average amount of time taken per disk I/O operation.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Seconds</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">WriteLatency</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average amount of time taken per disk I/O operation.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Seconds</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">ReadThroughput</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average number of bytes read from disk per second.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes/Second</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">WriteThroughput</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The average number of bytes written to disk per second.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes/Second</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">NetworkReceiveThroughput</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The incoming (Receive) network traffic on the DB instance, including both customer database traffic and Amazon RDS traffic used for monitoring and replication.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
<br></td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">NetworkTransmitThroughput</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The outgoing (Transmit) network traffic on the DB instance, including both customer database traffic and Amazon RDS traffic used for monitoring and replication.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
</td></tr></tbody></table></div><br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">And the list of specific metrics specific for datastores:</span></p>
<ol style="margin-top:0pt;margin-bottom:0pt"><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Cassandra (see [1])</span></p>
</li><li dir="ltr" style="list-style-type:decimal;font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">MongoDB (see [2])</span></p>
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<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Redis (see [3])</span></p>
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<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Couchbase (see [4])</span></p>
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<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">MySQL (see [5])<br>
</span></p></li></ol><div dir="ltr" style="margin-left:0pt"><table style="border:medium none;border-collapse:collapse"><colgroup><col width="251"><col width="373"></colgroup><tbody><tr style="height:123px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px">
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">BinLogDiskUsage</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The amount of disk space occupied by binary logs on the master. Applies to MySQL read replicas.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Bytes</span></p>
</td></tr><tr style="height:0px"><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">ReplicaLag</span></p>
</td><td style="border-width:1px;border-style:solid;border-color:rgb(0,0,0);vertical-align:top;padding:7px"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The amount of time a Read Replica DB Instance lags behind the source DB Instance. Applies to MySQL read replicas.</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">The ReplicaLag metric reports the value of the Seconds_Behind_Master field of the MySQL SHOW SLAVE STATUS command. For more information, see [6]</span><a href="http://dev.mysql.com/doc/refman/5.6/en/show-slave-status.html" style="text-decoration:none"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline"> </span></a><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline"></span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Units: Seconds</span></p>
</td></tr></tbody></table></div><br><br><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">To receive all metrics we might need to adopt guestagent to send them as part of notification process (by using periodic task mechanism), as the part of ceilometer integration.</span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline"><br>
So, the major goal of this thread is to collect all use cases and requirements and build out suitable monitoring feature design (step by step, of course).</span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline"><br>
<br>Thoughts?</span><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline"><br>
<br>Links:</span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">[1] </span><a href="http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_monitoring_c.html" style="text-decoration:none"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(17,85,204);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline">http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_monitoring_c.html</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">[2] </span><a href="http://blog.mongodb.org/post/62152249344/the-top-5-metrics-to-watch-in-mongodb" style="text-decoration:none"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(17,85,204);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline">http://blog.mongodb.org/post/62152249344/the-top-5-metrics-to-watch-in-mongodb</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">[3] </span><a href="http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/CacheMetrics.Redis.html" style="text-decoration:none"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(17,85,204);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline">http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/CacheMetrics.Redis.html</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">[4] </span><a href="http://blog.couchbase.com/monitoring-couchbase-cluster" style="text-decoration:none"><span style="font-size:16px;font-family:'Times New Roman';color:rgb(17,85,204);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline">http://blog.couchbase.com/monitoring-couchbase-cluster</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0)"><span style="font-size:16px;font-family:'Times New Roman';background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;vertical-align:baseline">[5] <a href="http://www.hyperic.com/products/mysql-monitoring">http://www.hyperic.com/products/mysql-monitoring</a></span></span><span style="font-size:16px;font-family:'Times New Roman';color:rgb(17,85,204);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline"><br>
</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0)"><span style="font-size:16px;font-family:'Times New Roman';background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;vertical-align:baseline">[6] <a href="http://dev.mysql.com/doc/refman/5.6/en/show-slave-status.html">http://dev.mysql.com/doc/refman/5.6/en/show-slave-status.html</a></span></span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0)"><span style="font-size:16px;font-family:'Times New Roman';background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;vertical-align:baseline"><br>
</span></span></p><br><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Best regards,</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:19px;font-family:'Times New Roman';color:rgb(0,0,0);background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline">Denis Makogon</span></p>
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