Document that the "-P" option to pg_autovacuum is insecure on many
platforms, and suggest using ~/.pgpass instead.
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@ -36,9 +36,9 @@ list.
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pg_autovacuum requires that the statistics system be enabled and
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reporting row level stats. The overhead of the stats system has been
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shown to have a significant cost under certain workloads. For
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instance, a tight loop of queries performing "select 1" was found to
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run nearly 30% slower when stats were enabled. However, in practice,
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shown to be significant under certain workloads. For instance, a
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tight loop of queries performing "select 1" was found to run nearly
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30% slower when row-level stats were enabled. However, in practice,
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with more realistic workloads, the stats system overhead is usually
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nominal.
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@ -127,8 +127,11 @@ pg_autovacuum has the following optional arguments:
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-U username: Username pg_autovacuum will use to connect with, if not
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specified the current username is used.
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-P password: Password pg_autovacuum will use to connect with. *WARNING*
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When installed as a Windows Service, this option will be stored in plain
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text in the registry.
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This option is insecure. When installed as a Windows Service, this
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option will be stored in plain text in the registry. When used with
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most Unix variants, other users will be able to see the argument to
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the "-P" option via ps(1). The ~/.pgpass file can be used to
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specify a password more securely.
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-H host: host name or IP to connect to.
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-p port: port used for connection.
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-h help: list of command line options.
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