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<?php
/*
* Copyright (c) 2008 Guillaume Lelarge <guillaume@lelarge.info>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
$buffer = $navigate_stats.'
<div id="pgContentWrap">
<h1>Cache Hit Ratio</h1>
';
$query = "SELECT datname,
blks_read,
blks_hit,
round((blks_hit::float/(blks_read+blks_hit+1)*100)::numeric, 2) as cachehitratio
FROM pg_stat_database
ORDER BY datname, cachehitratio";
$rows = pg_query($connection, $query);
if (!$rows) {
echo "An error occured.\n";
exit;
}
$buffer .= '<div class="tblBasic">
<table border="0" cellpadding="0" cellspacing="0" class="tblBasicGrey">
<tr>
<th class="colFirst" width="40%">Database Name</th>
<th class="colMid" width="20%">Blocks Read</th>
<th class="colMid" width="20%">Blocks Hit</th>
<th class="colLast" width="20%">Cache Hit Ratio (%)</th>
</tr>
';
while ($row = pg_fetch_array($rows)) {
$buffer .= tr()."
<td>";
if ($row['blks_read'] >= $row['blks_hit']) {
$buffer .= '<span class="txtImportant">';
}
$buffer .= $row['datname'];
if ($row['blks_read'] >= $row['blks_hit']) {
$buffer .= '</span>';
}
$buffer .= "</td>
<td>".$row['blks_read']."</td>
<td>".$row['blks_hit']."</td>
<td>".$row['cachehitratio']."</td>
</tr>";
}
$buffer .= '</table>
</div>
';
$buffer .= '<button id="showthesource">Show SQL commands!</button>
<div id="source">
<p>'.$query.'</p>
</div>';
$filename = $outputdir.'/cachehitratio.html';
include 'lib/fileoperations.php';
?>
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