<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Displaying Replication Statistics</title> <link rel="stylesheet" href="gettingStarted.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Getting Started with the Oracle Berkeley DB SQL APIs" /> <link rel="up" href="sqlrep.html" title="Chapter 4. Using Replication with the SQL API" /> <link rel="prev" href="reppragma.html" title="Replication PRAGMAs" /> <link rel="next" href="rep_usageexamples.html" title="Replication Usage Examples" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 12.1.6.1</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Displaying Replication Statistics</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="reppragma.html">Prev</a> </td> <th width="60%" align="center">Chapter 4. Using Replication with the SQL API</th> <td width="20%" align="right"> <a accesskey="n" href="rep_usageexamples.html">Next</a></td> </tr> </table> <hr /> </div> <div class="sect1" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title" style="clear: both"><a id="repstatistics"></a>Displaying Replication Statistics</h2> </div> </div> </div> <p> You can display a brief summary of replication statistics using <code class="literal">.stat :rep:</code>. This command displays the most basic information about replication status, as well as some information that is useful for troubleshooting. </p> <pre class="programlisting">dbsql> .stat :rep: Replication summary statistics Environment configured as a replication client Startup complete 1/50232 Maximum permanent LSN 2 Number of environments in the replication group 0 Number of failed message sends 0 Number of messages ignored due to pending recovery 0 Number of log records currently queued </pre> <p> In the above output: </p> <div class="itemizedlist"> <ul type="disc"> <li> <p> <code class="literal">Environment configured as a replication client</code> </p> <p> Identifies the current role of the site within the replication group. In this example, the current site is not the master site. <span class="emphasis"><em>Replication client</em></span> is another term for <span class="emphasis"><em>replica</em></span>. </p> </li> <li> <p> <code class="literal">Startup complete</code> </p> <p> Indicates that this replica site has completed its synchronization with the master site. Replica synchronization can take some time if there are many master transactions with which it needs to catch up. </p> </li> <li> <p> <code class="literal">Maximum permanent LSN</code> </p> <p> Identifies the most recent log record that is durably replicated on a master or acknowledged by a replica. You can compare a replica's maximum permanent LSN to the master's maximum permanent LSN to determine if the replica is caught up with the master. </p> </li> <li> <p> <code class="literal">Number of failed message sends</code> </p> <p> If this number is increasing, it could be an indication of network or communications problems between sites in the replication group. </p> </li> <li> <p> <code class="literal">Number of messages ignored due to pending recovery</code> </p> <p> If this number is increasing, this site is ignoring messages because it is starting up or recovering and may need some time to catch up with the rest of the replication group. </p> </li> <li> <p> <code class="literal">Number of log records currently queued</code> </p> <p> If this number is increasing, it means that connections to other sites may be unavailable or congested and that there may be delays in durably replicating master transactions. </p> </li> </ul> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="reppragma.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="sqlrep.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="rep_usageexamples.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Replication PRAGMAs </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Replication Usage Examples</td> </tr> </table> </div> </body> </html>