Try running the command "free" I think, although I don't know why and would love for someone on this list to answer this question that this is a better actual representation of the free memory on the box. I am running the same config as you, only 3 boxes with 8 gig of RAM each and Oracle RAC. My hunch is that top and vmstat are showing the actual memory locations that are empty, where a "free" command shows the memory addresses that while may have something in them, are able to be recycled and used. Can someone verify that I am right or way off base? Thanks -Troy ----- Original Message ----- From: qua nong <quanong_os@xxxxxxxxx> Date: Thursday, March 15, 2007 9:02 pm Subject: RHEL 4 - Memory Problem To: redhat-list@xxxxxxxxxx > Hi list, > > We have a AMD with RHEL4 64 installed and the Oracle 10g > installed as well. > It has the latest kernel update 2.6.9-42.0.8.ELsmp but the > memory is always being used by some unexplained processes. > > There are 4 CPUs, 16 GB RAM, 33GB swap but memory used = 16148872k > > Even when oracle is shutdown, a memory use is still > nearly 16GB. CPU is 99.4 % in idle, and I/O is too quiet. This > is quite difficult to explain. > > Could anyone have any idea ? > > Here is the display of the top command > > top - 14:57:33 up 30 days, 22:29, 3 users, load > average: 0.22, 0.10, 0.02 > Tasks: 121 total, 1 running, 120 > sleeping, 0 stopped, 0 zombie > Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 99.4% > id, 0.6% wa, 0.0% hi, 0.0% si > Mem: 16360260k total, 16198280k used, 161980k > free, 256496k buffers > Swap: 33551744k total, 186960k used, 33364784k free, > 14973940k cached > > vmstat 2 > procs -----------memory---------- ---swap-- -----io---- --system- > - ----cpu---- > r b swpd free > buff cache si so > bi bo in cs us > sy id wa > 0 0 186960 161420 256496 14973940 > 0 0 1 > 112 3 1 0 > 0 99 1 > 0 0 186960 162284 256496 14973940 > 0 0 0 170 > 1021 2162 0 0 100 0 > 0 0 186960 162276 256496 14973940 > 0 0 > 0 44 1009 2149 0 0 100 0 > 0 0 186960 162284 256496 14973940 > 0 0 > 0 42 1008 2244 0 0 99 0 > 0 0 186960 162292 256496 14973940 > 0 0 > 0 48 1011 2164 0 0 99 0 > 0 0 186960 162292 256496 14973940 > 0 0 > 0 56 1006 2118 0 0 100 0 > 0 0 186960 162292 256496 14973940 > 0 0 > 0 66 1011 2154 0 0 98 2 > > > > cat /proc/meminfo > MemTotal: 16360260 kB > MemFree: 162740 kB > Buffers: 256496 kB > Cached: 14973940 kB > SwapCached: 9724 kB > Active: 2709340 kB > Inactive: 12799980 kB > HighTotal: 0 kB > HighFree: 0 kB > LowTotal: 16360260 kB > LowFree: 162740 kB > SwapTotal: 33551744 kB > SwapFree: 33364784 kB > Dirty: 332 kB > Writeback: 140 kB > Mapped: 1147256 kB > Slab: 608056 kB > CommitLimit: 41731872 kB > Committed_AS: 7853044 kB > PageTables: 39080 kB > VmallocTotal: 536870911 kB > VmallocUsed: 16760 kB > VmallocChunk: 536854071 kB > HugePages_Total: 0 > HugePages_Free: 0 > Hugepagesize: 2048 kB > > > > > > > > > > ____________________________________________________________________________________ > Never miss an email again! > Yahoo! Toolbar alerts you the instant new Mail arrives. > http://tools.search.yahoo.com/toolbar/features/mail/ > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject÷subscribe > https://www.redhat.com/mailman/listinfo/redhat-list > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Troy Knabe Senior Systems Administrator Computing and Information Services 4J School District knabe@xxxxxxxxxxx Ph: 541.687.3587 Cell: 541.968.0780 -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list
