opennms postgres connection slow

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http://serverfault.com – i am running the opennms application server on a physical server and the database on an ESXi VM. Recently the opennms webconsole has been very slow to load as such i deleted most of the events from the database table, now both servers have no load at all, and the psql connection from the application server to the database server is also very fast, but somehow opennms webconsole is still slow. this is the strace from the opennms process id: 18629 futex(0x2aaac77d8a84, FUTEX_WAIT_PRIVATE, 453, NULL <unfinished ...> 3015 futex(0x2aaabc4a2ee4, FUTEX_WAIT_PRIVATE, 323, NULL <unfinished (HowTos)