oracle orion hugepages_settings.sh（支持OEL 7,4.1内核）

zhjh256 2021-08-07 原文

orion需要首先配置hugepage，否则会出现下列错误。

[root@yyxxdb01 ~]# /opt/app/11.2.0/grid_home/bin/orion -run oltp -testname mytest

ORION: ORacle IO Numbers — Version 11.2.0.4.0

************************ Large Pages Information *******************

Parameter use_large_pages = onlyPer process system memlock (soft) limit = 64 KB

Large Pages unused system wide = 0 (0 KB)

Large Pages configured system wide = 0 (0 KB)

Large Page size = 2048 KB

ERROR:

Failed to allocate shared global region with large pages, unix errno = 12.

Aborting the run of Orion. ORA-27137: unable to allocate Large Pages to create a shared memory segment

ACTION:

Total Orion I/O Buf Area size is 6144 KB. Prior to next instance restart:

1. Increase the number of unused large pages (page size 2048 KB)

to at least 3 (6144 KB) to allocate 100% Orion I/O Buf Area

with large pages.

2. Large pages are automatically locked into physical memory.

Increase the per process memlock (soft) limit to at least 8192 KB to lock

100% Orion I/O Buf Area\’s large pages into physical memory

*******************************************************************

Increase huge pages as suggested or set -hugenotneeded flag on command line

Failed to create shared memory of size 1051296 (orion_setup_shmem:skgmcreate)

Linux-x86_64 Error: 12: Cannot allocate memory

Additional information: 2097152

orion_parse_args: orion_setup_shmem failed

#!/bin/bash

#

# hugepages_settings.sh

#

# Linux bash script to compute values for the

# recommended HugePages/HugeTLB configuration

#

# Note: This script does calculation for all shared memory

# segments available when the script is run, no matter it

# is an Oracle RDBMS shared memory segment or not.

# Check for the kernel version

KERN=`uname -r | awk -F. \'{ printf("%d.%d\n",$1,$2); }\'`

# Find out the HugePage size

HPG_SZ=`grep Hugepagesize /proc/meminfo | awk {\'print $2\'}`

# Start from 1 pages to be on the safe side and guarantee 1 free HugePage

NUM_PG=1

# Cumulative number of pages required to handle the running shared memorysegments

for SEG_BYTES in `ipcs -m | awk {\'print $5\'} | grep "[0-9][0-9]*"`

do

   MIN_PG=`echo "$SEG_BYTES/($HPG_SZ*1024)" | bc -q`

   if [ $MIN_PG -gt 0 ]; then

      NUM_PG=`echo "$NUM_PG+$MIN_PG+1" | bc -q`

   fi

done

# Finish with results

case $KERN in

   \'2.4\') HUGETLB_POOL=`echo "$NUM_PG*$HPG_SZ/1024" | bc -q`;

          echo "Recommended setting: vm.hugetlb_pool = $HUGETLB_POOL" ;;

   \'2.6\' | \'3.8\' | \'4.1\') echo "Recommended setting: vm.nr_hugepages = $NUM_PG" ;;

    *) echo "Unrecognizedkernel version $KERN. Exiting." ;;

esac

# End