比如：在ASE12.5中，执行sp_helpdevice master的结果为：

1> sp_helpdevice master
2> go
 device_name                    physical_name
         description
         status cntrltype device_number
         low
         high
----------------------------------------------------------------------------------------------------------------
 master                         e:\sybase125\data\master.dat
         special, dsync on, default disk, physical disk, 100.00 MB
              3         0             0
                                                                                        0
                                                                                    51199

(1 row affected)
(return status = 0)

上面输出结果中加粗标记出来的100.00MB表示master设备的总大小。至于master设备还剩余多少空间？master设备都分配给哪些数据库使用了？ASE15.x之前版本的存储过程sp_helpdevice不能给出答案。

在ASE15.0之后版本的系统存储过程sp_helpdevice增加了上述功能。比如：ASE15.0.3中执行sp_helpdevice master的结果如下：

1> sp_helpdevice master
2> go
 device_name physical_name
         description
         status cntrltype vdevno vpn_low vpn_high
-------------------------------------------------------------------------------------
         ------ --------- ------ ------- --------
 master      D:\sybase\data\master.dat
         file system device, special, MIRROR ENABLED, mirror = 'D:\sybase\data\master_mirr.dat', serial writes, dsync on, directio off, reads mirrored,
          default disk, physical disk, 80.00 MB, Free: 42.00 MB
            739         0      0       0    40959

(1 row affected)
 dbname      size          allocated           vstart lstart
 ----------- ------------- ------------------- ------ ------
 master           26.00 MB Dec  2 2009  6:58PM      4      0
 model             6.00 MB Dec  2 2009  6:58PM  13316      0
 sybsystemdb       6.00 MB Dec  2 2009  6:58PM  19460      0

(1 row affected)
(return status = 0)

上面的结果包含master设备的剩余空间：42MB，以及master设备上分配了master，model，sybsystemdb三个系统库，以及相应的数据库大小、分配日期等等。

那么，如何在ASE15.x之前的版本中查看设备的剩余空间以及设备上的数据库分配信息呢？

方法有两种：

1.使用sybase central这个sybase ASE自带的客户端工具。个人感觉ASE15以来自带的Sybase Central功能比较丰富，更加易用了。

在ASE12.5自带的Sybase Central上查看各设备的剩余空间：

在master设备上点右键，选择“属性”，切换到databases能够看到在master设备上各个数据库所分配的空间。

2.自己编写一个存储过程，比如：sp_helpdevice2。

我参考了ASE12.5.4和ASE15.0.3中的sp_helpdevice的语法完成该过程sp_helpdevice2的编写。分别在ASE v11.0.1, ASE v11.5.1， ASE v11.9.2, ASE v12.5, v12.5.0.3, v12.5.4 平台上进行了测试。

/*
* 此存储过程sp_helpdevice2适用于 ASE v11.x, v12.x,不能用于ASE15.x。实际上ASE15.x中的sp_helpdevice包含设备剩余空间以及设备上所分配的数据库的功能！
* ASE v11.x版本中系统表 sysusages中没有crdate这个表示设备段分配时间的字段，考虑到支持ASEv11.x，为了简单处理，没有在Allocation information 中列出设备段的具体分配时间！
*/

/*
* 此存储过程在ASE v11.0.1, ASE v11.5.1，ASE v11.9.2, ASE v12.5, v12.5.0.3, v12.5.4 平台测试通过！适用于 ASE v11.x, v12.x,不能用于ASE15。实际上ASE15.x中的sp_helpdevice完全能够实现该功能！
* ASE v11.x版本中系统表 sysusages中没有crdate这个表示设备段分配时间的字段，考虑到支持ASEv11.x为了简单处理，没有在Allocation information 中列出设备段的具体分配时间！
*/
use sybsystemprocs
go

if exists(select 1 from dbo.sysobjects where type='P' and name='sp_helpdevice2')
  drop procedure sp_helpdevice2
go

create procedure sp_helpdevice2
@devname varchar(30) = "%"
as

declare @numpgsmb float
declare @numpgsmb2 float
declare @Major_Version int

set nocount on
select @numpgsmb = (1048576. / @@pagesize)
select @numpgsmb2 = (1048576. / @@maxpagesize)
--select @version_as_num = @@version_as_integer
select @Major_Version= convert(int, right(substring(@@version,1,charindex('.',@@version)-1),2) )

if @Major_Version >= 15 or @Major_Version < 11
begin
    print "this procedure is available for ASE versions from v11.x to v12.5.x, not for ASE15.x!"
    return (1)
end

/*  See if the device exists.*/
if not exists (select *
            from master.dbo.sysdevices
                where name like @devname)
begin
    /* 17610, "No such i/o device exists." */
    raiserror 17610
    return (1)
end

/* total size of device */
select d.name,
    totalsizeMB = (1. + (d.high - d.low)) / @numpgsmb
  into #totalsize
    from master.dbo.sysdevices d
        where d.status & 2 = 2
            and name like @devname
        group by d.name

/* Calculate used size in MB */
select d.name,
    usedsizeMB = isnull(sum(u.size) / @numpgsmb2,0)
  into #usedsize                
    from master.dbo.sysdevices d, master.dbo.sysusages u
        where u.vstart >= d.low and u.vstart <= d.high                          
            and d.status & 2 = 2
            and d.name like @devname
        group by d.name
union
select d.name, 0.
from master.dbo.sysdevices d
  where not exists ( select 1 from master.dbo.sysusages u where u.vstart >= d.low and u.vstart <= d.high )
      and d.status & 2 = 2
      and d.name like @devname

set nocount off
/* Calculate the free size of device */
select d.name ,TotalSize = str(#totalsize.totalsizeMB,10,2), UsedSize = str(#usedsize.usedsizeMB,10,2),FreeSize = str(#totalsize.totalsizeMB - #usedsize.usedsizeMB,10,2),phyname = convert(varchar(50),d.phyname)
  from master.dbo.sysdevices d, #totalsize, #usedsize
  where    d.name = #totalsize.name
    and #totalsize.name = #usedsize.name
  order by low,high

if (select count(*) from master.dbo.sysdevices where name like @devname) = 1
begin
    print ""
    print "========================== Allocate Information =========================="
    /*if @Major_Version = 12
        select dbname = db_name(dbid), "size(MB)"=str(size/@numpgsmb2,10,2), allocated = u.crdate, vstart, lstart
          from master.dbo.sysusages u, master.dbo.sysdevices d
            where d.status & 2 = 2
              and d.name like @devname
              and (u.vstart >= d.low and u.vstart <= d.high )
           order by dbname,vstart
     else if @Major_Version = 11
     */
        select dbname = db_name(dbid), "size(MB)"=str(size/@numpgsmb2,10,2), vstart, lstart
          from master.dbo.sysusages u, master.dbo.sysdevices d
            where d.status & 2 = 2
              and d.name like @devname
              and (u.vstart >= d.low and u.vstart <= d.high )
           order by dbname,vstart

end

drop table #totalsize
drop table #usedsize
go

/* grant the execute privilege to public */
grant execute on sp_helpdevice2 to public
go

 

存储过程sp_helpdevice2的语法在此下载：sp_helpdevice2

使用存储过程sp_helpdevice2的输出结果见下图所示：

最后，存储过程sp_helpdevice2仅输出了一些基本信息，像设备的状态信息等还请结合自带的sp_helpdevice进行查看。

在chinaunix的sybase板块有讨论此博文主题的帖子：怎么查看设备文件上还有多少空间没有被分配出去

有什么建议欢迎在博文后面留言！

--更新： 2021-09-08

增加显示设备ID，数据库ID，设备内偏移页号。

use sybsystemprocs
go

if exists(select 1 from dbo.sysobjects where type='P' and name='sp_helpdevice2')
        drop procedure sp_helpdevice2
go

/*
* 此存储过程在ASE v11.0.1, ASE v11.5.1, ASE v11.9.2, ASE v12.0, ASE v12.5, v12.5.0.3, v12.5.2, v12.5.4 平台测试通过！适用于 ASE v11.x, v12.x,不能用于ASE15。实际上ASE15.x中的sp_helpdevice完全能够实现该功能！
* ASE v11.x及ASE v12.0版本中系统表 sysusages中没有crdate这个表示设备段分配时间的字段，考虑到支持ASE v11.x为了简单处理，没有在Database Allocation information 中列出设备段的具体分配时间！
* ASE v11.x及ASE v12.0只支持2K页面，没有全局变量@@maxpagesize，需要手工替换本存储过程源码中的@@maxpagesize为@@pagesize！
*/
create procedure sp_helpdevice2
        @devname varchar(30) = "%"
as

declare @numpgsmb float
declare @numpgsmb2 float
declare @Major_Version int
declare @Page2KMulti int

set nocount on
--select @version_as_num = @@version_as_integer
select @Major_Version= convert(int, right(substring(@@version, 1, charindex('.', @@version) - 1), 2))
if @Major_Version >= 15 or @Major_Version < 11
begin
    print "this procedure is available for ASE versions from v11.x to v12.5.x, not for ASE15.x!"
    return (1)
end

select @numpgsmb = (1048576. / @@pagesize)
select @numpgsmb2 = (1048576. / @@maxpagesize)
select @Page2KMulti = @@maxpagesize / 2048

/*  See if the device exists.*/
if not exists (select *
            from master.dbo.sysdevices
                where name like @devname)
begin
    /* 17610, "No such i/o device exists." */
    raiserror 17610
    return (1)
end

/* total size of device */
select d.name,
    totalsizeMB = (1. + (d.high - d.low)) / @numpgsmb
  into #totalsize
    from master.dbo.sysdevices d
        where d.status & 2 = 2
            and name like @devname
        group by d.name

/* Calculate used size in MB */
select d.name,
    usedsizeMB = isnull(sum(u.size) / @numpgsmb2,0)
  into #usedsize                
    from master.dbo.sysdevices d, master.dbo.sysusages u
        where u.vstart >= d.low and u.vstart <= d.high                          
            and d.status & 2 = 2
            and d.name like @devname
        group by d.name
union
select d.name, 0.
from master.dbo.sysdevices d
  where not exists ( select 1 from master.dbo.sysusages u where u.vstart >= d.low and u.vstart <= d.high )
      and d.status & 2 = 2
      and d.name like @devname

set nocount off
/* Calculate the free size of device */
select DevNo = d.low / power(2, 24),
            DevName = d.name,
            TotalSize = str(#totalsize.totalsizeMB, 10, 2),
            UsedSize = str(#usedsize.usedsizeMB, 10, 2),
            FreeSize = str(#totalsize.totalsizeMB - #usedsize.usedsizeMB, 10, 2),
            PhysName = convert(varchar(100), d.phyname)
  from master.dbo.sysdevices d, #totalsize, #usedsize
  where d.name = #totalsize.name
    and #totalsize.name = #usedsize.name
  order by low,high

if (select count(*) from master.dbo.sysdevices where name like @devname) = 1
begin
    print ""
    print "========================== Database Allocation Information =========================="
    /*if @Major_Version = 12
        select dbname = db_name(dbid), "size(MB)"=str(size/@numpgsmb2,10,2), allocated = u.crdate, vstart, lstart
          from master.dbo.sysusages u, master.dbo.sysdevices d
            where d.status & 2 = 2
              and d.name like @devname
              and (u.vstart >= d.low and u.vstart <= d.high )
           order by dbname,vstart
     else if @Major_Version = 11
     */
        select u.dbid, dbname = db_name(u.dbid),
                "size(MB)"=str(u.size / @numpgsmb2, 10, 2),
                u.vstart,
                (u.vstart  - d.low) / @Page2KMulti as offsetpage,
                u.lstart
        from master.dbo.sysusages u, master.dbo.sysdevices d
        where d.status & 2 = 2
                and d.name like @devname
                and (u.vstart >= d.low and u.vstart <= d.high )
        order by u.vstart
end

drop table #totalsize
drop table #usedsize
go

/* grant the execute privilege to public */
grant execute on sp_helpdevice2 to public
go
 

如果Sybase ASE 版本为v11.x及v12.0，只支持2K页面，没有全局变量@@maxpagesize，需要手工替换本存储过程源码中的@@maxpagesize为@@pagesize！

use sybsystemprocs
go

if exists(select 1 from dbo.sysobjects where type='P' and name='sp_helpdevice2')
        drop procedure sp_helpdevice2
go

/*
* 此存储过程在ASE v11.0.1, ASE v11.5.1, ASE v11.9.2, ASE v12.0, ASE v12.5, v12.5.0.3, v12.5.2, v12.5.4 平台测试通过！适用于 ASE v11.x, v12.x,不能用于ASE15。实际上ASE15.x中的sp_helpdevice完全能够实现该功能！
* ASE v11.x及ASE v12.0版本中系统表 sysusages中没有crdate这个表示设备段分配时间的字段，考虑到支持ASE v11.x为了简单处理，没有在Database Allocation information 中列出设备段的具体分配时间！
* ASE v11.x及ASE v12.0只支持2K页面，没有全局变量@@maxpagesize，需要手工替换本存储过程源码中的@@maxpagesize为@@pagesize！
*/
create procedure sp_helpdevice2
        @devname varchar(30) = "%"
as

declare @numpgsmb float
declare @numpgsmb2 float
declare @Major_Version int
declare @Page2KMulti int

set nocount on
--select @version_as_num = @@version_as_integer
select @Major_Version= convert(int, right(substring(@@version, 1, charindex('.', @@version) - 1), 2))
if @Major_Version >= 15 or @Major_Version < 11
begin
    print "this procedure is available for ASE versions from v11.x to v12.5.x, not for ASE15.x!"
    return (1)
end

select @numpgsmb = (1048576. / @@pagesize)
select @numpgsmb2 = (1048576. / @@pagesize)
select @Page2KMulti = @@pagesize / 2048

/*  See if the device exists.*/
if not exists (select *
            from master.dbo.sysdevices
                where name like @devname)
begin
    /* 17610, "No such i/o device exists." */
    raiserror 17610
    return (1)
end

/* total size of device */
select d.name,
    totalsizeMB = (1. + (d.high - d.low)) / @numpgsmb
  into #totalsize
    from master.dbo.sysdevices d
        where d.status & 2 = 2
            and name like @devname
        group by d.name

/* Calculate used size in MB */
select d.name,
    usedsizeMB = isnull(sum(u.size) / @numpgsmb2,0)
  into #usedsize                
    from master.dbo.sysdevices d, master.dbo.sysusages u
        where u.vstart >= d.low and u.vstart <= d.high                          
            and d.status & 2 = 2
            and d.name like @devname
        group by d.name
union
select d.name, 0.
from master.dbo.sysdevices d
  where not exists ( select 1 from master.dbo.sysusages u where u.vstart >= d.low and u.vstart <= d.high )
      and d.status & 2 = 2
      and d.name like @devname

set nocount off
/* Calculate the free size of device */
select DevNo = d.low / power(2, 24),
            DevName = d.name,
            TotalSize = str(#totalsize.totalsizeMB, 10, 2),
            UsedSize = str(#usedsize.usedsizeMB, 10, 2),
            FreeSize = str(#totalsize.totalsizeMB - #usedsize.usedsizeMB, 10, 2),
            PhysName = convert(varchar(100), d.phyname)
  from master.dbo.sysdevices d, #totalsize, #usedsize
  where d.name = #totalsize.name
    and #totalsize.name = #usedsize.name
  order by low,high

if (select count(*) from master.dbo.sysdevices where name like @devname) = 1
begin
    print ""
    print "========================== Database Allocation Information =========================="
    /*if @Major_Version = 12
        select dbname = db_name(dbid), "size(MB)"=str(size/@numpgsmb2,10,2), allocated = u.crdate, vstart, lstart
          from master.dbo.sysusages u, master.dbo.sysdevices d
            where d.status & 2 = 2
              and d.name like @devname
              and (u.vstart >= d.low and u.vstart <= d.high )
           order by dbname,vstart
     else if @Major_Version = 11
     */
        select u.dbid, dbname = db_name(u.dbid),
                "size(MB)"=str(u.size / @numpgsmb2, 10, 2),
                u.vstart,
                (u.vstart  - d.low) / @Page2KMulti as offsetpage,
                u.lstart
        from master.dbo.sysusages u, master.dbo.sysdevices d
        where d.status & 2 = 2
                and d.name like @devname
                and (u.vstart >= d.low and u.vstart <= d.high )
        order by u.vstart
end

drop table #totalsize
drop table #usedsize
go

/* grant the execute privilege to public */
grant execute on sp_helpdevice2 to public
go
 

—————————————————————————————————-

本文为andkylee个人原创，请在尊重作者劳动成果的前提下进行转载；

—- 转载务必注明原始出处 : http://www.dbainfo.net

—- 关键字：  ASE15之前版本 设备剩余空间 sp_helpdevice2

—————————————————————————————————-

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