(b)另外我从帮助上看到是这样解释的：
GPGSLO: lowest amount freemem can be before pages are stolen from processes.
GPGSHI: once pages are stolen from processes, don't stop before freemem reaches this value.
这儿所指的“freemem”是sar -r 输出的freemem吗？
（2）sarcheck发现有如下问题：
The following indication(s) of a memory shortage were seen: The reclaim
rate was at least one quarter of the page fault rate in only 0.0 percent －－》中间这句话不太明白
of the samples. This statistic can be used to confirm the presence of
an occasional memory-poor condition.
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
The average swap out transfer request rate was 705.9 per second, which
is an indication of a memory-poor condition.
（疑问：swap out transfer request rate的值是怎么算出来的？）
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
The average number of free pages usually did not stray far above the
value of GPGSHI. This indicates that vhand, the page stealing daemon,
was usually active and the memory poor condition seen on this system has
resulted in increased CPU overhead as well as additional disk activity.
（疑问：我的sar -r 输出：
15:05:32 freemem freeswp availrmem availsmem (-r)
15:05:33 520623 1048576 797295 404552
15:05:34 520522 1048576 797295 404434
15:05:35 520433 1048576 797295 404345
系统的GPGSHI＝6000，freemem=520623是远大于GPGSHI的值的，可是为什么说sarcheck为什么说不是呢？（The average number of free pages usually did not stray far above the value of GPGSHI）
sarcheck是这样报告的：The average number of free pages reported by sar was significantly
higher than the value of GPGSHI, even though memory shortages were seen.
This indicates that an intermittent memory bottleneck may exist.
Both GPGSHI and GPGSLO were set to high values, relative to the amount
of memory present.
（疑问：我的系统物理内存为4G，sar -r可以看出freemem为520623个页，约为2G，GPGSHI＝6000，GPGSLO＝2000，这个参数设置算高吗？）
问题比较多，麻烦各位了