Streaming Replication

[ning chan <ninchan8328@xxxxxxxxx>]

Hi,

I am new to PG Streaming Replication and I have a simple question hopefully someone can answer this easily.

I setup a Primary Hot Standby and they are connecting each other without problem.
Looking at the wal sender process, both servers pointing to the same location as follow:

Primary:
postgres  3018  0.0  0.1 203888  3024 ?        Ss   19:25   0:00 postgres: wal sender process postgres 10.89.94.31(43169) streaming 0/D913018

Standby:
postgres  3645  0.0  0.1 212556  3096 ?        Ss   19:25   0:00 postgres: wal receiver process   streaming 0/D913018

My question is when looking at the standby processes, I see startup process as follow:

postgres  3320  0.0  0.0 203048  2084 ?        Ss   18:11   0:00 postgres: startup process   recovering 00000001000000000000000D

What is that suppose to mean?

Is it really recovering some data from WAL record in the pg_xlog folder?

Thanks~
Ning