[20190321]smem的显示缺陷.txt
[20190321]smem的显示缺陷.txt
1.smem 加入-m参数显示存在缺陷,map的信息不全:
# smem -tk -m -u oracle -p "oraclepeis|ora_"
map pids avgpss pss
/u01/app/oracle/product/10.2.0/db_1/dbs/ 15 0 0
[vdso] 308 0 0
[vsyscall] 308 0 0
/lib64/libaio.so.1.0.1 308 3.0k 1.1m
/lib64/libnsl-2.12.so 308 7.0k 2.1m
/lib64/ld-2.12.so 308 7.0k 2.1m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 7.0k 2.1m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 7.0k 2.1m
/lib64/libdl-2.12.so 308 7.0k 2.1m
/lib64/libnss_files-2.12.so 308 7.0k 2.2m
/lib64/libpthread-2.12.so 308 7.0k 2.2m
/lib64/libm-2.12.so 308 7.0k 2.3m
/lib64/libc-2.12.so 308 12.0k 3.7m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 14.0k 4.2m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 21.0k 6.5m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 21.0k 6.5m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 32.0k 9.7m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 56.0k 17.1m
[stack] 308 80.0k 24.1m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 103.0k 31.2m
/u01/app/oracle/product/10.2.0/db_1/bin/ 308 127.0k 38.3m
<anonymous> 308 242.0k 72.8m
[heap] 308 466.0k 140.5m
/dev/zero 308 561.0k 168.9m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 589.0k 177.4m
/u01/app/oracle/product/10.2.0/db_1/lib/ 308 1.4m 417.1m
/sysv94f021f8 308 2.8m 876.1m
-----------------------------------------------------------------
27 8023 6.5m 2.0g
--//map部分显示宽度不足.可以加宽到80.很容易修改python的脚本,我不懂python,看一下源代码就可以了.
--//修改前注意备份!!
# diff -nur smem.org smem
--- smem.org 2019-03-21 11:18:59.117243470 +0800
+++ smem 2013-03-28 11:01:07.000000000 +0800
@@ -330,7 +330,7 @@
pt = maptotals(p)
fields = dict(
- map=('map', lambda n: n, '%-80.80s', len,
+ map=('map', lambda n: n, '%-40.40s', len,
'mapping name'),
count=('count', lambda n: pt[n]['count'], '% 5s', sum,
'number of mappings found'),
# smem.org -tk -m -u oracle -p "oraclepeis|ora_"
map pids avgpss pss
/u01/app/oracle/product/10.2.0/db_1/dbs/hc_peis.dat 15 0 0
[vdso] 151 0 0
[vsyscall] 151 0 0
/lib64/libaio.so.1.0.1 151 3.0k 588.0k
/u01/app/oracle/product/10.2.0/db_1/lib/libclsra10.so 151 7.0k 1.1m
/lib64/libnsl-2.12.so 151 7.0k 1.1m
/lib64/libnss_files-2.12.so 151 7.0k 1.1m
/u01/app/oracle/product/10.2.0/db_1/lib/libskgxn2.so 151 7.0k 1.1m
/lib64/libdl-2.12.so 151 7.0k 1.1m
/lib64/ld-2.12.so 151 7.0k 1.1m
/lib64/libpthread-2.12.so 151 7.0k 1.1m
/lib64/libm-2.12.so 151 8.0k 1.2m
/lib64/libc-2.12.so 151 14.0k 2.2m
/u01/app/oracle/product/10.2.0/db_1/lib/libdbcfg10.so 151 15.0k 2.2m
/u01/app/oracle/product/10.2.0/db_1/lib/libocrb10.so 151 22.0k 3.4m
/u01/app/oracle/product/10.2.0/db_1/lib/libskgxp10.so 151 22.0k 3.4m
/u01/app/oracle/product/10.2.0/db_1/lib/libocr10.so 151 34.0k 5.0m
/u01/app/oracle/product/10.2.0/db_1/lib/libocrutl10.so 151 61.0k 9.0m
[stack] 151 97.0k 14.4m
/u01/app/oracle/product/10.2.0/db_1/lib/libhasgen10.so 151 110.0k 16.3m
/u01/app/oracle/product/10.2.0/db_1/bin/oracle 151 222.0k 32.8m
<anonymous> 151 265.0k 39.2m
[heap] 151 488.0k 72.0m
/u01/app/oracle/product/10.2.0/db_1/lib/libnnz10.so 151 640.0k 94.4m
/dev/zero 151 950.0k 140.1m
/u01/app/oracle/product/10.2.0/db_1/lib/libjox10.so 151 1.5m 221.0m
/sysv94f021f8 151 5.8m 880.7m
---------------------------------------------------------------------------------------------------------
27 3941 10.2m 1.5g
--//pids表示查询的进程数量,它是将pss平均分摊到各个用户.
--//sysv94f021f8表示共享内存段.
# ipcs -m
------ shared memory segments --------
key shmid owner perms bytes nattch status
0x94f021f8 32768 oracle 640 1176502272 151
--//key=0x94f021f8,不过后面的pss如果计算的不是很清楚感觉应该是1176502272/1024/1024 = 1122m.难道不过全部加载吗?
--//nattch表示连接使用共享内存段的进程数.正好151可以与smem显示的pids对上.不再生产系统折腾,换测试机器测试.
2.测试环境:
# smem -tk -m -u oracle -p "oraclebook|ora_"
map pids avgpss pss
/sysv00000000 26 0 0
/sysve8a8ec10 26 0 0
/u01/app/oracle/product/11.2.0.4/dbhome_1/dbs/hc_book.dat 21 0 0
[vdso] 26 0 0
[vsyscall] 26 0 0
/lib64/libnss_dns-2.5.so 1 24.0k 24.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnque11.so 6 5.0k 30.0k
/lib64/libresolv-2.5.so 1 35.0k 35.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclsra11.so 26 4.0k 104.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrutl11.so 26 4.0k 104.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxn2.so 26 4.0k 104.0k
/usr/lib64/libaio.so.1.0.1 26 4.0k 104.0k
/usr/lib64/libnuma.so.1 26 4.0k 104.0k
/lib64/libdl-2.5.so 26 8.0k 208.0k
/lib64/libnsl-2.5.so 26 8.0k 208.0k
/lib64/librt-2.5.so 26 8.0k 208.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libdbcfg11.so 26 8.0k 208.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnfsodm11.so 26 8.0k 208.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxp11.so 26 8.0k 208.0k
/lib64/libnss_files-2.5.so 26 8.0k 212.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrb11.so 26 9.0k 234.0k
/lib64/libpthread-2.5.so 26 9.0k 237.0k
/lib64/ld-2.5.so 26 10.0k 260.0k
/lib64/libm-2.5.so 26 12.0k 328.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocr11.so 26 14.0k 364.0k
/lib64/libc-2.5.so 26 22.0k 581.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libcell11.so 26 69.0k 1.8m
[stack] 26 82.0k 2.1m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libhasgen11.so 26 162.0k 4.1m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnnz11.so 26 231.0k 5.9m
[heap] 26 418.0k 10.6m
/dev/zero 26 793.0k 20.1m
/u01/app/oracle/product/11.2.0.4/dbhome_1/bin/oracle 26 1.3m 35.1m
<anonymous> 26 1.6m 42.4m
---------------------------------------------------------------------------------------------------------
34 809 4.9m 126.1m
--//奇怪在共享内存段使用0.
# ipcs -m
------ shared memory segments --------
key shmid owner perms bytes nattch status
0x00000000 349011969 oracle 640 12582912 26
0x00000000 349044738 oracle 640 633339904 26
0xe8a8ec10 349077507 oracle 640 2097152 26
3.关闭hugepages看看.
vm.nr_hugepages = 0
vm.nr_overcommit_hugepages = 0
# grep -i page /proc/meminfo
anonpages: 249336 kb
pagetables: 18228 kb
anonhugepages: 0 kb
hugepages_total: 0
hugepages_free: 0
hugepages_rsvd: 0
hugepages_surp: 0
hugepagesize: 2048 kb
# ipcs -m
------ shared memory segments --------
key shmid owner perms bytes nattch status
0x00000000 349208577 oracle 640 12582912 22
0x00000000 349241346 oracle 640 633339904 22
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0xe8a8ec10 349274115 oracle 640 2097152 22
# smem -tk -m -u oracle -p "oraclebook|ora_"
map pids avgpss pss
/sysve8a8ec10 22 0 0
/u01/app/oracle/product/11.2.0.4/dbhome_1/dbs/hc_book.dat 20 0 0
[vdso] 22 0 0
[vsyscall] 22 0 0
/lib64/libnss_dns-2.5.so 1 24.0k 24.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnque11.so 4 6.0k 24.0k
/lib64/libresolv-2.5.so 1 35.0k 35.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclsra11.so 22 4.0k 88.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrutl11.so 22 4.0k 88.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxn2.so 22 4.0k 88.0k
/usr/lib64/libaio.so.1.0.1 22 4.0k 88.0k
/usr/lib64/libnuma.so.1 22 4.0k 88.0k
/lib64/libdl-2.5.so 22 8.0k 176.0k
/lib64/libnsl-2.5.so 22 8.0k 176.0k
/lib64/librt-2.5.so 22 8.0k 176.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libdbcfg11.so 22 8.0k 176.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnfsodm11.so 22 8.0k 176.0k
/lib64/libnss_files-2.5.so 22 8.0k 179.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrb11.so 22 9.0k 198.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxp11.so 22 9.0k 198.0k
/lib64/libpthread-2.5.so 22 9.0k 200.0k
/lib64/ld-2.5.so 22 10.0k 220.0k
/lib64/libm-2.5.so 22 12.0k 281.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocr11.so 22 14.0k 308.0k
/lib64/libc-2.5.so 22 22.0k 492.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libcell11.so 22 70.0k 1.5m
[stack] 22 73.0k 1.6m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libhasgen11.so 22 166.0k 3.6m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnnz11.so 22 232.0k 5.0m
[heap] 22 420.0k 9.0m
/dev/zero 22 572.0k 12.3m
/u01/app/oracle/product/11.2.0.4/dbhome_1/bin/oracle 22 1.6m 34.4m
<anonymous> 22 1.8m 38.6m
/sysv00000000 22 4.0m 88.6m
---------------------------------------------------------------------------------------------------------
34 686 9.1m 198.0m
--///sysv00000000那行pss=88.6m.
sys@book> select /*+ full(a) */ count(*) from sh.sales a;
count(*)
----------
918843
[root@gxqyydg4 ip=100.78 /etc ] # smem -tk -m -u oracle -p "oraclebook|ora_"
map pids avgpss pss
/sysve8a8ec10 22 0 0
/u01/app/oracle/product/11.2.0.4/dbhome_1/dbs/hc_book.dat 20 0 0
[vdso] 22 0 0
[vsyscall] 22 0 0
/lib64/libnss_dns-2.5.so 1 24.0k 24.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnque11.so 4 6.0k 24.0k
/lib64/libresolv-2.5.so 1 35.0k 35.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclsra11.so 22 4.0k 88.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrutl11.so 22 4.0k 88.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxn2.so 22 4.0k 88.0k
/usr/lib64/libaio.so.1.0.1 22 4.0k 88.0k
/usr/lib64/libnuma.so.1 22 4.0k 88.0k
/lib64/libdl-2.5.so 22 8.0k 176.0k
/lib64/libnsl-2.5.so 22 8.0k 176.0k
/lib64/librt-2.5.so 22 8.0k 176.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libdbcfg11.so 22 8.0k 176.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnfsodm11.so 22 8.0k 176.0k
/lib64/libnss_files-2.5.so 22 8.0k 179.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocrb11.so 22 9.0k 198.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libskgxp11.so 22 9.0k 198.0k
/lib64/libpthread-2.5.so 22 9.0k 200.0k
/lib64/ld-2.5.so 22 10.0k 220.0k
/lib64/libm-2.5.so 22 12.0k 282.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libocr11.so 22 14.0k 308.0k
/lib64/libc-2.5.so 22 22.0k 492.0k
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libcell11.so 22 70.0k 1.5m
[stack] 22 76.0k 1.6m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libhasgen11.so 22 166.0k 3.6m
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libnnz11.so 22 232.0k 5.0m
[heap] 22 420.0k 9.0m
/dev/zero 22 642.0k 13.8m
/u01/app/oracle/product/11.2.0.4/dbhome_1/bin/oracle 22 1.6m 35.0m
<anonymous> 22 1.8m 38.7m
/sysv00000000 24 6.0m 143.7m
---------------------------------------------------------------------------------------------------------
34 747 11.0m 262
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