Hi SS,
A1: Yes.
A2: Sorry, I have updated kernel on Sunday and do not backup dev_ms file. Also, this is a cluster system so only enserver.exe and msg_server.exe are running. The memory consumption are very small.
A3: We have about 200 requests per week but it does not seem to be issue caused by development.
A4: I will check dev_w0 next time but I don't think it is a connection issue, too.
A5: I have updated kernel 721_EXT to 324.
# Table Buffer Tuning
rtbb/buffer_length = 200000
rsdb/ntab/irbdsize = 8000
rsdb/ntab/sntabsize = 3000
ztta/roll_first = 1
ztta/roll_area = 3000000
rdisp/PG_MAXFS = 262144
rdisp/PG_SHM = 32768
abap/heap_area_dia = 8000000000
abap/heap_area_nondia = 16000000000
abap/heaplimit = 40000000
#ztta/roll_extension = 4000000000
#ztta/roll_extension_dia = 4000000000
#ztta/roll_extension_nondia = 4000000000
em/address_space_MB = 4096
zcsa/db_max_buftab = 50000
zcsa/presentation_buffer_area = 26001000
zcsa/table_buffer_area = 332800000