Upon logging in OEM thorugh web browser, Performance grid is not displaying any data.

error from emoms.tr:


2008-03-06 11:08:08,228 [MetricCollector:SITEMAP_THREAD151:15] ERROR em.MetricEngine run.377 - MetricCollectorThread[MetricCollector:SITEMAP_THREAD151:15] encountered class java.lang.OutOfMemoryError -- null
java.lang.OutOfMemoryError
2008-03-06 11:08:14,728 [MetricCollector:SITEMAP_THREAD151:15] ERROR em.MetricEngine run.377 - MetricCollectorThread[MetricCollector:SITEMAP_THREAD151:15] encountered class java.lang.OutOfMemoryError -- null
java.lang.OutOfMemoryError