100% swap, how to reduce its usage?

Hi All,
Hoping you could offer some suggestions.
RAM --> 256 GB
oracle 11.2.0.2 on RHEL 5.7
has 2 databases on this database server, with each allocated 50GB.(MEMORY_MAX_TARGET=MEMORY_TARGET=50G)
free -h
lnx133:/app/oracle/product/agent11.2:>free -g
total used free shared buffers cached
Mem: 251 34 217 0 0 31
-/+ buffers/cache: 3 248
Swap: 17 17 0
Why does this command show 34GB used for RAM? & also if RAM is available why has swap space jumped upto 100%? this started happening last week.
vmstat output is as follows
lnx133:/app/oracle/product/agent11.2:>vmstat 2 5
procs -----------memory---------- -swap -----io---- system -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 18545588 228141920 140932 32580436 0 0 128 72 0 0 1 0 98 0 0
0 0 18545588 228141664 140988 32580408 0 0 0 114 1048 2809 0 0 100 0 0
0 0 18545588 228142128 140996 32580452 0 0 0 54 1010 2775 0 0 100 0 0
0 0 18545588 228141632 141036 32580420 0 0 0 84 1017 2790 0 0 100 0 0
0 0 18545588 228141728 141088 32580412 0 0 0 38 1015 2795 0 0 100 0 0
swap in/out is 0 from the output? please help me connect these dots.

l0gman wrote:
Hi All,
Hoping you could offer some suggestions.
RAM --> 256 GB
oracle 11.2.0.2 on RHEL 5.7
has 2 databases on this database server, with each allocated 50GB.(MEMORY_MAX_TARGET=MEMORY_TARGET=50G)
free -h
lnx133:/app/oracle/product/agent11.2:>free -g
total used free shared buffers cached
Mem: 251 34 217 0 0 31
-/+ buffers/cache: 3 248
Swap: 17 17 0
Why does this command show 34GB used for RAM? & also if RAM is available why has swap space jumped upto 100%? this started happening last week.
vmstat output is as follows
lnx133:/app/oracle/product/agent11.2:>vmstat 2 5
procs -----------memory---------- -swap -----io---- system -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 18545588 228141920 140932 32580436 0 0 128 72 0 0 1 0 98 0 0
0 0 18545588 228141664 140988 32580408 0 0 0 114 1048 2809 0 0 100 0 0
0 0 18545588 228142128 140996 32580452 0 0 0 54 1010 2775 0 0 100 0 0
0 0 18545588 228141632 141036 32580420 0 0 0 84 1017 2790 0 0 100 0 0
0 0 18545588 228141728 141088 32580412 0 0 0 38 1015 2795 0 0 100 0 0
swap in/out is 0 from the output? please help me connect these dots.How do I ask a question on the forums?
SQL and PL/SQL FAQ
scroll down to #9 to learn how to use tags so that data column alignment is maintained.
when SI & SO rates are *ZERO* then RAM is *NOT* a bottleneck & you should calm your worries.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

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