/dev/sda1 SCSI 0:0 100 /boot /dev/sda2 10240 / /dev/sda3 2048 swap F:\vm\rac\rac2\localdisk.vmdk /dev/sda1 SCSI

shmall = 4000000000 kernel.sem = 250 512000 100 2048 kernel.sysrq = 1 kernel.core_uses_pid = 1 kernel

生成公钥openssl genrsa -3 -out testkey.pem 2048其中-3是算法的参数，2048是密钥长度，testkey.pem 是输出的文件 ii.转成x509格式（含作者有效期等）openssl

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

mp.dbf' size 32m autoextend on next 32m maxsize 2048m extent management local; 注：tempfile是自动生成的。路径要写正确。

readCMDFromSocket(InputStream in) { int MAX_BUFFER_BYTES = 2048; String msg = ""; byte[] tempbuffer = new byte[MAX_BUFFER_BYTES];

dbf'  size 500m  autoextend on  next 50m maxsize 2048m  extent management local;  create tablespace ts_mydb 

对于第三个缺点，epoll没有这个限制，它所支持的FD上限是最大可以打开文件的数目，这个数字一般远大于2048,举个例子,在1GB内存的机器上大约是10万左右，具体数目可以cat /proc/sys/fs/file-max察看

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

# netperf -t TCP_RR -H 172.16.38.36 -l 10 -- -r 2048,32768 TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0

512字节 513MB~1024MB(1GB) 2 1024字节(1KB) 1025MB~2048MB(2GB) 4 2048 字节(2KB) 大于等于2049MB 8 4KB 从上面可以看出，也就是说不管驱

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

61. public class Zip { static final int BUFFER = 2048; public static void main (String argv[]) { try {

BIN$vYuv+g9fTi2exYP9X2048Q==$0 B BIN$geQ9+NekSjuRvzG+TqDVWw==$0 SQL> flashback table "BIN$vYuv+g9fTi2exYP9X2048Q==$0"

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512

# netperf -t TCP_RR -H 172.16.38.36 -l 10 -- -r 2048,32768 TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0

-XX:PermSize=512M -XX:MaxPermSize=2048M -Xmn128M -Xms1024M -Xmx2048M referring to these options for Oracle

512 perslab 2048 slab class 4: chunk size 1024 perslab 1024 slab class 5: chunk size 2048 perslab 512