Thanks, i missed that.
After doing these changes, following is the observation:
1. The size of the pgstat file is 86KB. Last edited was when i moved the
file location to RAMdisk.
2. The issue persists. I am seeing continuous logs:
2012-01-05 00:00:06 JST WARNING: pgstat wait timeout
2012-01-05 00:00:14 JST WARNING: pgstat wait timeout
2012-01-05 00:00:26 JST WARNING: pgstat wait timeout
.
.
.
2012-01-05 15:36:25 JST WARNING: pgstat wait timeout
2012-01-05 15:36:37 JST WARNING: pgstat wait timeout
2012-01-05 15:36:45 JST WARNING: pgstat wait timeout
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