DR: Needed to send a ping message but failed. 1

Hi All, I am running IDS 11.70 FC7 on AIX server. I am running primary, HDR (async) and RSS server, I have noticed an increase in the frequency of following messages: DR: Needed to send a ping message but failed. 1 I have checked the network connectivity between primary and secondary and it is normal and its not showing any glitches. Can someone help me that what particular i can monitor when it start logging these messages in the online.log, so that i could tune that particular item to improve the performance of both primary & secondary. One thing i noticed that when this message appears in the log, the next checkpoint is taking more time to complete than normal. Also i noticed that during this time, there were some user sessions (in the output of onstat -u command) which were showing the following flags: G-BPX-- (which indicates the waiting for write of the logical log buffer) I have checked the IO activity for the disk and CPU utilizations and they are very normal. Thanks in advance. Regards, Khan