[pgsql-jp: 39939] autovacuum機能について

[ikebe kenshi]

池辺です．
postgresql-8.3.7について質問です．
現在autovacuum機能をONにして利用しています．
しかし，pgAdminIIIを利用して，テーブルを参照しようとすると，
バキュームする？
みたいなメッセージが出ます．
これはこんなものなのでしょうか？それとも設定がまちがっているのでしょうか？
postgresql.confの内容は以下の通りです．
#------------------------------------------------------------------------------
# AUTOVACUUM PARAMETERS
#------------------------------------------------------------------------------

autovacuum = on            # Enable autovacuum subprocess?  'on' 
                    # requires track_counts to also be on.
#log_autovacuum_min_duration = -1    # -1 disables, 0 logs all actions and
                    # their durations,> 0 logs only
                    # actions running at least that time.
#autovacuum_max_workers = 3        # max number of autovacuum subprocesses
autovacuum_naptime = 1min        # time between autovacuum runs
autovacuum_vacuum_threshold = 50    # min number of row updates before
                    # vacuum
autovacuum_analyze_threshold = 50    # min number of row updates before 
                    # analyze
autovacuum_vacuum_scale_factor = 0.2    # fraction of table size before vacuum
autovacuum_analyze_scale_factor = 0.1    # fraction of table size before analyze
#autovacuum_freeze_max_age = 200000000    # maximum XID age before forced vacuum
                    # (change requires restart)
#autovacuum_vacuum_cost_delay = 20    # default vacuum cost delay for
                    # autovacuum, -1 means use
                    # vacuum_cost_delay
#autovacuum_vacuum_cost_limit = -1    # default vacuum cost limit for
                    # autovacuum, -1 means use
                    # vacuum_cost_limit


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