This parameter specifies the number of entries that you require the password file to
accept. This number corresponds to the number of distinct users allowed to connect to
the database as SYSDBA or SYSOPER. The actual number of allowable entries can be
higher than the number of users, because the ORAPWD utility continues to assign
password entries until an operating system block is filled. For example, if your
operating system block size is 512 bytes, it holds four password entries. The number of
password entries allocated is always a multiple of four.

Entries can be reused as users are added to and removed from the password file. If
you intend to specify REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE, and to allow the
granting of SYSDBA and SYSOPER privileges to users, this parameter is required.

Caution: When you exceed the allocated number of password
entries, you must create a new password file. To avoid this
necessity, allocate a number of entries that is larger than you think
you will ever need.

orapwd参数之 : ENTRIES
1. 指定可以以sysdba 或 sysoper连接的不同的用户数
2. 实际的可连接数可比文件中指定的大 , 因为orapwd工具持续的分配密码入口知道操作系统块
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orapwd parameter : ENTRIES (43)

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