diff --git a/sys/include/bio.h b/sys/include/bio.h
index 763692b..926e659 100644
--- a/sys/include/bio.h
+++ b/sys/include/bio.h
@@ -6,7 +6,7 @@ typedef	struct	Biobufhdr	Biobufhdr;
 
 enum
 {
-	Bsize		= 8*1024,
+	Bsize		= 16*1024,
 	Bungetsize	= UTFmax+1,		/* space for ungetc */
 	Bmagic		= 0x314159,
 	Beof		= -1,
diff --git a/sys/src/cmd/5a/a.h b/sys/src/cmd/5a/a.h
index eb3a70e..60b6fa9 100644
--- a/sys/src/cmd/5a/a.h
+++ b/sys/src/cmd/5a/a.h
@@ -15,7 +15,7 @@ typedef	struct	Hist	Hist;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		8192
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/5l/l.h b/sys/src/cmd/5l/l.h
index 234e9d2..998ced2 100644
--- a/sys/src/cmd/5l/l.h
+++ b/sys/src/cmd/5l/l.h
@@ -200,7 +200,7 @@ enum
 	NHUNK		= 100000,
 	MINSIZ		= 64,
 	NENT		= 100,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,	/* limit of path elements for history symbols */
 
 	Roffset	= 22,		/* no. bits for offset in relocation address */
diff --git a/sys/src/cmd/6a/a.h b/sys/src/cmd/6a/a.h
index 85a882d..e14a0f1 100644
--- a/sys/src/cmd/6a/a.h
+++ b/sys/src/cmd/6a/a.h
@@ -18,7 +18,7 @@ typedef	struct	Gen2 	Gen2;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		500
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/6l/l.h b/sys/src/cmd/6l/l.h
index 6c52627..b7859e6 100644
--- a/sys/src/cmd/6l/l.h
+++ b/sys/src/cmd/6l/l.h
@@ -122,7 +122,7 @@ enum
 	MINSIZ		= 8,
 	STRINGSZ	= 200,
 	MINLC		= 1,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 
 	Yxxx		= 0,
diff --git a/sys/src/cmd/8a/a.h b/sys/src/cmd/8a/a.h
index 3bac7ae..02b71b2 100644
--- a/sys/src/cmd/8a/a.h
+++ b/sys/src/cmd/8a/a.h
@@ -17,7 +17,7 @@ typedef	struct	Gen2 	Gen2;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		500
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/8l/l.h b/sys/src/cmd/8l/l.h
index e68d840..94e6958 100644
--- a/sys/src/cmd/8l/l.h
+++ b/sys/src/cmd/8l/l.h
@@ -115,7 +115,7 @@ enum
 	MINSIZ		= 4,
 	STRINGSZ	= 200,
 	MINLC		= 1,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 
 	Yxxx		= 0,
diff --git a/sys/src/cmd/9a/a.h b/sys/src/cmd/9a/a.h
index b6d5000..3d6ccdc 100644
--- a/sys/src/cmd/9a/a.h
+++ b/sys/src/cmd/9a/a.h
@@ -15,7 +15,7 @@ typedef	struct	Hist	Hist;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		8192
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/9l/l.h b/sys/src/cmd/9l/l.h
index f83fd96..99cce14 100644
--- a/sys/src/cmd/9l/l.h
+++ b/sys/src/cmd/9l/l.h
@@ -98,7 +98,7 @@ enum
 	FPCHIP		= 1,
 	BIG		= 32768-8,
 	STRINGSZ	= 200,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 	DATBLK		= 1024,
 	NHASH		= 10007,
diff --git a/sys/src/cmd/cat.c b/sys/src/cmd/cat.c
index ac58889..e3f4efa 100644
--- a/sys/src/cmd/cat.c
+++ b/sys/src/cmd/cat.c
@@ -4,7 +4,7 @@
 void
 cat(int f, char *s)
 {
-	char buf[8192];
+	char buf[16*1024];
 	long n;
 
 	while((n=read(f, buf, (long)sizeof buf))>0)
diff --git a/sys/src/cmd/cc/cc.h b/sys/src/cmd/cc/cc.h
index 73fe157..8445a86 100644
--- a/sys/src/cmd/cc/cc.h
+++ b/sys/src/cmd/cc/cc.h
@@ -23,7 +23,7 @@ typedef	struct	Bits	Bits;
 typedef	Rune	TRune;	/* target system type */
 
 #define	NHUNK		50000L
-#define	BUFSIZ		8192
+#define	BUFSIZ		16*1024
 #define	NSYMB		1500
 #define	NHASH		1024
 #define	STRINGSZ	200
diff --git a/sys/src/cmd/cp.c b/sys/src/cmd/cp.c
index 1b07e09..f12c571 100644
--- a/sys/src/cmd/cp.c
+++ b/sys/src/cmd/cp.c
@@ -1,7 +1,7 @@
 #include <u.h>
 #include <libc.h>
 
-#define	DEFB	(8*1024)
+#define	DEFB	(16*1024)
 
 int	failed;
 int	gflag;
diff --git a/sys/src/cmd/cpu.c b/sys/src/cmd/cpu.c
index bc834f6..8c3ceff 100644
--- a/sys/src/cmd/cpu.c
+++ b/sys/src/cmd/cpu.c
@@ -12,7 +12,7 @@
 #include <fcall.h>
 #include <libsec.h>
 
-#define	Maxfdata 8192
+#define	Maxfdata (16*1024)
 #define MaxStr 128
 
 void	remoteside(void);
diff --git a/sys/src/cmd/exportfs/exportfs.c b/sys/src/cmd/exportfs/exportfs.c
index 8190f64..513469f 100644
--- a/sys/src/cmd/exportfs/exportfs.c
+++ b/sys/src/cmd/exportfs/exportfs.c
@@ -234,7 +234,7 @@ main(int argc, char **argv)
 	if(messagesize == 0){
 		messagesize = iounit(0);
 		if(messagesize == 0)
-			messagesize = 8192+IOHDRSZ;
+			messagesize = 16*1024+IOHDRSZ;
 	}
 	fhash = emallocz(sizeof(Fid*)*FHASHSIZE);
 
diff --git a/sys/src/cmd/fcp.c b/sys/src/cmd/fcp.c
index 79bbc12..e960afa 100644
--- a/sys/src/cmd/fcp.c
+++ b/sys/src/cmd/fcp.c
@@ -1,6 +1,6 @@
 #include <u.h>
 #include <libc.h>
-#define	DEFB	(8*1024)
+#define	DEFB	(16*1024)
 #define	Nwork	16
 
 int	failed;
diff --git a/sys/src/cmd/fossil/9proc.c b/sys/src/cmd/fossil/9proc.c
index f87cdc4..94fd5a9 100644
--- a/sys/src/cmd/fossil/9proc.c
+++ b/sys/src/cmd/fossil/9proc.c
@@ -8,7 +8,7 @@ enum {
 	NConInit	= 128,
 	NMsgInit	= 384,
 	NMsgProcInit	= 64,
-	NMsizeInit	= 8192+IOHDRSZ,
+	NMsizeInit	= 16*1024+IOHDRSZ,
 };
 
 static struct {
diff --git a/sys/src/cmd/iostats/statfs.h b/sys/src/cmd/iostats/statfs.h
index 6d82f19..507e7a2 100644
--- a/sys/src/cmd/iostats/statfs.h
+++ b/sys/src/cmd/iostats/statfs.h
@@ -10,7 +10,7 @@
 #define fidhash(s)	fhash[s%FHASHSIZE]
 
 enum{
-	Maxfdata	= 8192,	/* max size of data in 9P message */
+	Maxfdata	= 16*1024,	/* max size of data in 9P message */
 	Maxrpc		= 20000,/* number of RPCs we'll log */
 };
 
diff --git a/sys/src/cmd/ka/a.h b/sys/src/cmd/ka/a.h
index 9ab6ec6..ac22672 100644
--- a/sys/src/cmd/ka/a.h
+++ b/sys/src/cmd/ka/a.h
@@ -15,7 +15,7 @@ typedef	struct	Hist	Hist;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		500
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/kl/l.h b/sys/src/cmd/kl/l.h
index 07f46eb..8a96da8 100644
--- a/sys/src/cmd/kl/l.h
+++ b/sys/src/cmd/kl/l.h
@@ -100,7 +100,7 @@ enum
 	FPCHIP		= 1,
 	BIG		= 4096-8,
 	STRINGSZ	= 200,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 	DATBLK		= 1024,
 	NHASH		= 10007,
diff --git a/sys/src/cmd/ld/ld.h b/sys/src/cmd/ld/ld.h
index 84e8064..be738fc 100644
--- a/sys/src/cmd/ld/ld.h
+++ b/sys/src/cmd/ld/ld.h
@@ -46,7 +46,7 @@ enum
 	STRINGSZ	= 200,
 	NHASH		= 10007,
 	NHUNK		= 100000,
-	MAXIO		= 8192,
+	MAXIO		= 16*1024,
 	MAXHIST		= 20,	/* limit of path elements for history symbols */
 };
 
diff --git a/sys/src/cmd/mv.c b/sys/src/cmd/mv.c
index 0c64cd1..2a8e5bb 100644
--- a/sys/src/cmd/mv.c
+++ b/sys/src/cmd/mv.c
@@ -167,7 +167,7 @@ mv1(char *from, Dir *dirb, char *todir, char *toelem)
 int
 copy1(int fdf, int fdt, char *from, char *to)
 {
-	char buf[8192];
+	char buf[16*1024];
 	long n, n1;
 
 	while ((n = read(fdf, buf, sizeof buf)) > 0) {
diff --git a/sys/src/cmd/qa/a.h b/sys/src/cmd/qa/a.h
index ab93efd..efd2e5c 100644
--- a/sys/src/cmd/qa/a.h
+++ b/sys/src/cmd/qa/a.h
@@ -15,7 +15,7 @@ typedef	struct	Hist	Hist;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		8192
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/ql/l.h b/sys/src/cmd/ql/l.h
index 37afffa..f06cd65 100644
--- a/sys/src/cmd/ql/l.h
+++ b/sys/src/cmd/ql/l.h
@@ -98,7 +98,7 @@ enum
 	FPCHIP		= 1,
 	BIG		= 32768-8,
 	STRINGSZ	= 200,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 	DATBLK		= 1024,
 	NHASH		= 10007,
diff --git a/sys/src/cmd/ramfs.c b/sys/src/cmd/ramfs.c
index f021c4f..e4c87ec 100644
--- a/sys/src/cmd/ramfs.c
+++ b/sys/src/cmd/ramfs.c
@@ -15,7 +15,7 @@ enum
 	OPERM	= 0x3,		/* mask of all permission types in open mode */
 	Nram	= 1024,
 	Maxsize	= 768*1024*1024,
-	Maxfdata	= 8192,
+	Maxfdata	= 16*1024,
 	Maxulong= (1ULL << 32) - 1,
 };
 
diff --git a/sys/src/cmd/sam/sam.h b/sys/src/cmd/sam/sam.h
index a5ff1b9..53e86fb 100644
--- a/sys/src/cmd/sam/sam.h
+++ b/sys/src/cmd/sam/sam.h
@@ -87,7 +87,7 @@ struct List
 enum
 {
 	Blockincr =	256,
-	Maxblock = 	8*1024,
+	Maxblock = 	16*1024,
 
 	BUFSIZE = Maxblock,	/* size from fbufalloc() */
 	RBUFSIZE = BUFSIZE/sizeof(Rune),
diff --git a/sys/src/cmd/samterm/samterm.h b/sys/src/cmd/samterm/samterm.h
index 7f5e1b0..e7bebc3 100644
--- a/sys/src/cmd/samterm/samterm.h
+++ b/sys/src/cmd/samterm/samterm.h
@@ -2,7 +2,7 @@
 
 #define	RUNESIZE	sizeof(Rune)
 #define	MAXFILES	256
-#define	READBUFSIZE 8192
+#define	READBUFSIZE (16*1024)
 #define	NL	5
 
 enum{
diff --git a/sys/src/cmd/va/a.h b/sys/src/cmd/va/a.h
index eb98b84..f40951a 100644
--- a/sys/src/cmd/va/a.h
+++ b/sys/src/cmd/va/a.h
@@ -15,7 +15,7 @@ typedef	struct	Hist	Hist;
 #define	MAXALIGN	7
 #define	FPCHIP		1
 #define	NSYMB		8192
-#define	BUFSIZ		8192
+#define	BUFSIZ		(16*1024)
 #define	HISTSZ		20
 #define	NINCLUDE	10
 #define	NHUNK		10000
diff --git a/sys/src/cmd/vac/vac.c b/sys/src/cmd/vac/vac.c
index ec939b7..5c0dba2 100644
--- a/sys/src/cmd/vac/vac.c
+++ b/sys/src/cmd/vac/vac.c
@@ -14,7 +14,7 @@ usage(void)
 
 enum
 {
-	BlockSize = 8*1024,
+	BlockSize = 16*1024,
 };
 
 struct
diff --git a/sys/src/cmd/vl/l.h b/sys/src/cmd/vl/l.h
index 331277c..83564e3 100644
--- a/sys/src/cmd/vl/l.h
+++ b/sys/src/cmd/vl/l.h
@@ -168,7 +168,7 @@ enum
 	NHUNK		= 100000,
 	MINSIZ		= 64,
 	NENT		= 100,
-	MAXIO		= 8192,
+	MAXIO		= (16*1024),
 	MAXHIST		= 20,				/* limit of path elements for history symbols */
 };
 
diff --git a/sys/src/lib9p/srv.c b/sys/src/lib9p/srv.c
index ca0b6a3..95d4141 100644
--- a/sys/src/lib9p/srv.c
+++ b/sys/src/lib9p/srv.c
@@ -695,7 +695,7 @@ srv(Srv *srv)
 	if(srv->rpool == nil)
 		srv->rpool = allocreqpool(srv->destroyreq);
 	if(srv->msize == 0)
-		srv->msize = 8192+IOHDRSZ;
+		srv->msize = 16*1024+IOHDRSZ;
 
 	changemsize(srv, srv->msize);