Hi All, After we have extended disks in an Oracle server the RMAN backup is killed by the OOM killer. The full archive runs fine (ie, low memory usage) but the incremental immediately pushes all allocated memory into swap and then the OOM killer kicks in.
The guest is running 64bit SLES11 SP1 and Oracle 11G. The guest has 6G memory and 4G swap. When the OOM condition occurs we indeed have almost all memory and swap in use. Oracle advised to change the /proc/sys/vm/lower_zone_protection value. However this item is not present in the guest. Looking a bit further into this, it looks like the lower_zone_protection is (or was?) designed to free low memory in 32 bit systems. How can we tune this system to avoid getting hit by the OOM condition? Either to tune RMAN into lowering the memory usage or to tune memory in a way that RMAN can continue processing. Met vriendelijke groet/With kind regards/Mit freundlichen Grüßen, Berry van Sleeuwen Flight Forum 3000 5657 EW Eindhoven * +31 (0)6 22564276 [cid:[email protected]] [cid:[email protected]] ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
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