/**
* Reduces the number of rows held in this Cache object.
*
* <p>Cleanup is done by checking the accessCount of the Rows and removing the rows with the
* lowest access count.
*
* <p>Index operations require that up to 5 recently accessed rows remain in the cache.
*/
private synchronized void cleanUp() throws IOException {
int removeCount = cacheMap.size() / 2;
int accessTarget = cacheMap.getAccessCountCeiling(removeCount, removeCount / 8);
ObjectCacheHashMap.ObjectCacheIterator it = cacheMap.iterator();
int savecount = 0;
for (; it.hasNext(); ) {
CachedObject r = (CachedObject) it.next();
if (it.getAccessCount() <= accessTarget) {
if (!r.isKeepInMemory()) {
if (r.hasChanged()) {
rowTable[savecount++] = r;
}
it.remove();
cacheBytesLength -= r.getStorageSize();
}
}
}
cacheMap.setAccessCountFloor(accessTarget);
saveRows(savecount);
}
/** Writes out all modified cached Rows. */
public synchronized void saveAll() throws IOException {
Iterator it = cacheMap.iterator();
int savecount = 0;
for (; it.hasNext(); ) {
CachedObject r = (CachedObject) it.next();
if (r.hasChanged()) {
rowTable[savecount++] = r;
}
}
saveRows(savecount);
Trace.printSystemOut(saveAllTimer.elapsedTimeToMessage("Cache.saveRow() total row save time"));
Trace.printSystemOut("Cache.saveRow() total row save count = " + saveRowCount);
Trace.printSystemOut(makeRowTimer.elapsedTimeToMessage("Cache.makeRow() total row load time"));
Trace.printSystemOut("Cache.makeRow() total row load count = " + makeRowCount);
Trace.printSystemOut(sortTimer.elapsedTimeToMessage("Cache.sort() total time"));
}