?? cache.jsp
字號:
<%
/**
* $RCSfile: cache.jsp,v $
* $Revision: 1.1.1.1 $
* $Date: 2002/09/09 13:50:25 $
*/
%>
<%@ page import="java.util.*,
java.text.*,
com.jivesoftware.util.*,
com.jivesoftware.forum.*,
com.jivesoftware.forum.database.*,
com.jivesoftware.forum.util.*"
%>
<%! // global variables
// decimal formatter for cache values
static final DecimalFormat mbFormat = new DecimalFormat("#0.00");
static final DecimalFormat percentFormat = new DecimalFormat("#0.0");
// cache identifiers, names
static final int[] CACHE_TYPES = {
DatabaseCacheManager.FORUM_CACHE,
DatabaseCacheManager.THREAD_CACHE,
DatabaseCacheManager.MESSAGE_CACHE,
DatabaseCacheManager.USER_CACHE,
DatabaseCacheManager.USER_PERMS_CACHE,
DatabaseCacheManager.GROUP_CACHE
};
static final String[] CACHE_NAMES = {
"Forum",
"Thread",
"Message",
"User",
"User Permissions",
"Group"
};
// variable for the VM memory monitor box
static final int NUM_BLOCKS = 50;
%>
<%@ include file="include/global.jsp" %>
<% // get parameters
boolean cacheEnabled = ParamUtils.getBooleanParameter(request,"cacheEnabled");
boolean doCache = ParamUtils.getBooleanParameter(request,"doCache");
boolean clearCache = ParamUtils.getBooleanParameter(request,"clearCache");
// Get the underlying DbForumFactory
DbForumFactory dbForumFactory = null;
try {
dbForumFactory = (DbForumFactory)(((DbForumFactoryProxy)forumFactory).getProxiedForumFactory());
} catch (Exception e) {}
// Get a cache manager
DatabaseCacheManager cacheManager = dbForumFactory.getCacheManager();
if (clearCache) {
for (int i=0; i<CACHE_TYPES.length; i++) {
cacheManager.clear(CACHE_TYPES[i]);
}
response.sendRedirect("cache.jsp");
return;
}
// turn the cache on or off
if (doCache) {
cacheManager.setCacheEnabled(cacheEnabled);
response.sendRedirect("cache.jsp");
return;
}
cacheEnabled = cacheManager.isCacheEnabled();
%>
<%@ include file="include/header.jsp" %>
<p>
<% // Title of this page and breadcrumbs
String title = "Cache Settings";
String[][] breadcrumbs = {
{"Main", "main.jsp"},
{"Cache Settings", "cache.jsp"}
};
%>
<%@ include file="include/title.jsp" %>
<font size="-1">
Jive Forums relies on its cache to process forum data efficiently. Use this panel
to monitor and modify your cache settings. There are very few circumstances where
you should entirely disable cache However, you can edit the cache sizes to tune for
minimal memory use or maximum performance.
</font>
<p>
<font size="-1"><b>Cache Status</b></font>
<ul>
<font size="-1">
You can enable or disable caching in the Jive system by using the form
below. Disabling cache will severely degrade performance.
</font>
<form action="cache.jsp">
<input type="hidden" name="doCache" value="true">
<table bgcolor="<%= tableBorderColor %>" cellpadding="0" cellspacing="0" border="0" width="300">
<td>
<table bgcolor="<%= tableBorderColor %>" cellpadding="3" cellspacing="1" border="0" width="100%">
<tr bgcolor="#ffffff">
<td align="center"<%= (cacheEnabled)?" bgcolor=\"#99cc99\"":"" %>>
<font size="-1">
<input type="radio" name="cacheEnabled" value="true" id="rb01"
<%= (cacheEnabled)?"checked":"" %>>
<label for="rb01"><%= (cacheEnabled)?"<b>On</b>":"On" %></label>
</font>
</td>
<td align="center"<%= (!cacheEnabled)?" bgcolor=\"#cc6666\"":"" %>>
<font size="-1">
<input type="radio" name="cacheEnabled" value="false" id="rb02"
<%= (!cacheEnabled)?"checked":"" %>>
<label for="rb02"><%= (!cacheEnabled)?"<b>Off</b>":"Off" %></label>
</font>
</td>
<td align="center">
<input type="submit" value="Update">
</td>
</tr>
</table>
</td>
</table>
</form>
<% if (cacheEnabled) { %>
<p>
<font size="-1">
Clear all caches by clicking the button below.
</font>
<form action="cache.jsp">
<input type="hidden" name="clearCache" value="true">
<input type="submit" value="Clear All Caches">
</form>
<% } %>
</ul>
<% if (cacheEnabled) { %>
<p>
<font size="-1"><b>Cache Performance Summary</b></font>
<ul>
<font size="-1">
Below is a summary of all caches. To adjust the
size of each cache, click the "Edit Cache Sizes" button below.
<p>
Effectiveness
measures how well your cache is working. If the effectiveness is low, that
usually means that the cache is too small. Caches for which this may be
the case are flagged below.
</font>
<p>
<table bgcolor="<%= tableBorderColor %>" cellpadding="0" cellspacing="0" border="0">
<td>
<table cellpadding="4" cellspacing="1" border="0" width="100%">
<tr bgcolor="#eeeeee">
<td align="center"><font size="-2" face="verdana"><b>CACHE TYPE</b></font></td>
<td align="center"><font size="-2" face="verdana"><b>SIZE</b></font></td>
<td align="center"><font size="-2" face="verdana"><b>OBJECTS</b></font></td>
<td align="center"><font size="-2" face="verdana"><b>EFFECTIVENESS</b></font></td>
</tr>
<% // cache variables
double memUsed;
double totalMem;
double freeMem;
double hitPercent;
long hits;
long misses;
// Loop through each cache, print out its info
for( int i=0; i<CACHE_TYPES.length; i++ ) {
String name = CACHE_NAMES[i];
int type = CACHE_TYPES[i];
memUsed = (double)cacheManager.getSize(type)/(1024*1024);
totalMem = (double)cacheManager.getMaxSize(type)/(1024*1024);
freeMem = 100 - 100*memUsed/totalMem;
hits = cacheManager.getHits(type);
misses = cacheManager.getMisses(type);
if (hits + misses == 0) {
hitPercent = 0.0;
}
else {
hitPercent = 100*(double)hits/(hits+misses);
}
boolean lowEffec = (hits > 500 && hitPercent < 85.0 && freeMem < 20.0);
%>
<tr bgcolor="#ffffff">
<td><font size="-1"><%= name %></font></td>
<td align="right">
<font size="-1">
<%= mbFormat.format(totalMem) %> MB,
<%= percentFormat.format(freeMem)%>% free
</font>
</td>
<td align="right">
<font size="-1">
<%= cacheManager.getNumElements(type) %>
</font>
</td>
<td align="right">
<font size="-1">
<% if (lowEffec) { %>
<font color="#ff0000"><b><%= percentFormat.format(hitPercent)%>%</b></font>
<% } else { %>
<b><%= percentFormat.format(hitPercent)%>%</b>
<% } %>
(<%= hits %> hits, <%= misses %> misses)
</font>
</td>
</tr>
<% } %>
</table>
</td>
</table>
<p>
<form action="editCache.jsp">
<input type="submit" value="Edit Cache Sizes">
</form>
</ul>
<% } // end if cacheEnabled %>
<p>
<font size="-1"><b>Java VM Memory</b></font>
<ul>
<% // The java runtime
Runtime runtime = Runtime.getRuntime();
double freeMemory = (double)runtime.freeMemory()/(1024*1024);
double totalMemory = (double)runtime.totalMemory()/(1024*1024);
double usedMemory = totalMemory - freeMemory;
double percentFree = ((double)freeMemory/(double)totalMemory)*100.0;
int free = 100-(int)Math.round(percentFree);
%>
<table border=0>
<tr><td><font size="-1">Used Memory:</font></td>
<td><font size="-1"><%= mbFormat.format(usedMemory) %> MB</font></td>
</tr>
<tr><td><font size="-1">Total Memory:</font></td>
<td><font size="-1"><%= mbFormat.format(totalMemory) %> MB</font></td>
</tr>
</table>
<br>
<table border=0><td>
<table bgcolor="#000000" cellpadding="1" cellspacing="0" border="0" width="200" align=left>
<td>
<table bgcolor="#000000" cellpadding="1" cellspacing="1" border="0" width="100%">
<% for (int i=0; i<NUM_BLOCKS; i++) {
if ((i*(100/NUM_BLOCKS)) < free) {
%>
<td bgcolor="#00ff00" width="<%= (100/NUM_BLOCKS) %>%"><img src="images/blank.gif" width="1" height="15" border="0"></td>
<% } else { %>
<td bgcolor="#006600" width="<%= (100/NUM_BLOCKS) %>%"><img src="images/blank.gif" width="1" height="15" border="0"></td>
<% }
}
%>
</table>
</td>
</table></td><td>
<font size="-1">
<b><%= percentFormat.format(percentFree) %>% free</b>
</font>
</td></table>
</ul>
<% // Destroy the runtime reference
runtime = null;
%>
<%@ include file="include/footer.jsp" %>
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