In Oracle 10.2 and 11g the following describes "global cache freelist" event << global cache freelist All releasable locks are used and a new one has been requested. To make a resource element available, a resource element is pinged. Wait Time: The duration of the resource get operation to ping the resource element >> I think that LMS process does not fast enough to release locks. Michael On Fri, Oct 31, 2008 at 5:08 PM, Bort, Guillermo <guillermo.bort@xxxxxxx>wrote: > Not sure if it fits the case, but it's worth taking a look at. From the > RAC FAQ: > > > > What do I do if I see GC CR BLOCK LOST in my top 5 Timed Events in my AWR > Report? > > > > You should never see this or BLOCK RETRY events. This is most likely due to > a fault in your interconnect network. Work with your system administrator > or/and network administrator to find the fault. Check netstat -s > > > > Ip: > > 84884742 total packets received > > 1201 fragments dropped after timeout > > 3384 packet reassembles failed > > > > You do not want to see fragments dropped or packet reassemblies failed. > > > > ifconfig -a: > > > > eth0 Link encap:Ethernet HWaddr 00:0B:DB:4B:A2:04 > > inet addr:130.35.25.110 Bcast:130.35.27.255 Mask:255.255.252.0 > > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > > RX packets:21721236 errors:135 dropped:0 overruns:0 frame:95 > > TX packets:273120 errors:0 dropped:0 overruns:0 carrier:0 > > > > You do not want to see high number of errors. > > > > *Guillermo Alan Bort* > > DBA / DBA Main Team > > > > *EDS*, an HP company > > > > *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto: > oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Ajay Thotangare > *Sent:* Friday, October 31, 2008 12:48 PM > *To:* oracle-l@xxxxxxxxxxxxx > *Subject:* RAC waitevent: gc freelist on one node > > > > Hi, > > We have having a 3 node RAC and from last few days noticed performance of 1 > of node has degraded. In V$session session of that node, I always see lot of > sessions waiting on waitevent "gc freelist". I don't see this wait event on > other 2 nodes where performance is not affected. > > Not sure if this wait event is indicating something. I could not find any > documentation on this wait event Can somebody please explain me this wait > event or point me to right document. Does this wait event looks related to > degraded performance? > > Pls advice. > > --Ajay > > > -- Best Regards Michael Elkin