Shridhar Daithankar wrote: > Perhaps you could attempt to store a fix small number of records per row, say > 4-6? Or may be a smaller fixed size array, That should make the row overhead > less intrusive... Thanks, I didn't like your idea, but it helped me come up with another idea: (timeseries_id integer, top text, middle text, bottom text); The entire timeseries is the concatenation of 'top' (a few records), 'middle' (millions of records), and 'bottom' (a few records). To get the last record, or to append a record, you only read/write 'bottom', which is very fast. Whenever the entire timeseries is written (a less frequent operation), the division into these three parts will be redone, thus keeping 'bottom' small. ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to majordomo@xxxxxxxxxxxxxx)