Java!
Regards,
Sybrand Bakker, Oracle DBA
"Richard Brown (SPSD EAME)" <Richard.Brown_at_bedford.waii.com> wrote in
message news:3994232C.6B6310C0_at_bedford.waii.com...
>
> Has anyone noticed, or have an explanation for the massive increase in
memory resources
> required on a system after moving from Oracle 7.3.2.1 to 8i. I noticed
this on a Sun Ultra
> 10 (500Mb RAM) with Solaris 2.6 after building a new 8i db and instance
with identical
> init.ora parameters to an existing 7.3.2.1 db.
>
> Although the SGA was about 10% bigger, the system memory usage was a
massive 360% more
> (even if you don't include the two new processes). I realise there are a
raft of new
> default init parameters which may affect SGA size, and possibly account
for the 10%
> difference, but what on earth is causing the hike in system memory????
>
>
> 7.3.2.1
>
> Total System Global Area 5859944 bytes
> Fixed Size 39696 bytes
> Variable Size 4530008 bytes
> Database Buffers 1126400 bytes
> Redo Buffers 163840 bytes
>
> ps -lfe returns :
>
> F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY
TIME CMD
> 8 S oracle 19376 1 0 40 20 61454068 2612 60ebc03c 16:19:26 ?
0:01
> ora_dbwr_db7
> 8 S oracle 19378 1 0 40 20 60ff0db8 2612 60ebc04c 16:19:26 ?
0:01
> ora_lgwr_db7
> 8 S oracle 19380 1 0 41 20 628e6e70 2475 60ebc05c 16:19:26 ?
0:00
> ora_smon_db7
> 8 S oracle 19374 1 0 40 20 61dd69a8 2470 60ebc02c 16:19:26 ?
0:00
> ora_pmon_db7
>
> Size of processes = (Sum of SZ * 8) = 81352 Kb (79 Mb).
>
>
>
> 8i (8.1.5.1)
>
> Total System Global Area 6540688 bytes
> Fixed Size 64912 bytes
> Variable Size 5169152 bytes
> Database Buffers 1126400 bytes
> Redo Buffers 180224 bytes
>
> ps -lfe returns :
>
> F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY
TIME CMD
> 8 S oracle 19475 1 0 41 20 61334880 9125 60ebc07c 16:42:22 ?
0:00
> ora_dbw0_db8
> 8 S oracle 19477 1 0 41 20 60ff0db8 9116 60ebc08c 16:42:22 ?
0:00
> ora_lgwr_db8
> 8 S oracle 19481 1 3 40 20 61dd69a8 9119 60ebc0ac 16:42:22 ?
0:01
> ora_smon_db8
> 8 S oracle 19473 1 0 41 20 61dd4ea8 9184 60ebc06c 16:42:21 ?
0:00
> ora_pmon_db8
>
> Size of processes = (Sum of SZ * 8) = 292352 Kb (285 Mb).
>
> 8 S oracle 19483 1 0 41 20 61dd5c28 9110 60ebc0bc 16:42:22 ?
0:00
> ora_reco_db8
> 8 S oracle 19479 1 0 41 20 628e82b0 9113 60ebc09c 16:42:22 ?
0:00
> ora_ckpt_db8
>
> Size including the two extras = 438136 Kb (428 Mb)
>
>
>
> Where SZ = The total size of the process in virtual memory, including all
mapped files and
> devices, in pages. Where page size = 8192 bytes.
>
>
> Thanks Richard.
Received on Fri Aug 11 2000 - 00:00:00 CDT
