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ADARUN Parm |
Description |
Parm Influence |
RC |
SC |
Effect, etc. |
ASYTVS |
Asynchronous Buffer Flush YES = asynchronously (default) NO = not asynchronously ASYTVS=YES in connection with FMXIO>1 (number of parallel I/O operations) by LFIOP flush processing reduces the time for a buffer flush
Important for performance! |
LBP LP TFLUSH LFIOP FMXIO FIC |
-- |
-- |
Number and duration of a buffer flush |
FMXIO |
Parallel LFIOP I/O Operations The maximum number of parallel I/O operations by LFIOP flush processing Values 1 - 16
Important for performance! |
LBP LP TFLUSH ASYTVS FIC |
-- |
-- |
Fewer and faster buffer flushes, more I/Os per disk |
LBP |
Length of Buffer Pool Used to store ASSO and DATA blocks for processing. In 31-bit mode (EXCPVR), the buffer pool is automatically allocated above the 16-megabyte line 64-bit mode is also possible: "EXCPVR is being used for this run in ESA64 mode"
Most important for performance! |
LP TFLUSH LFIOP |
87 97 160 161 162 163 170 |
-- |
low values = poor buffer efficiency, more physical ASSO and DATA I/Os, more buffer flushes high values = increased paging Parm error 12 Parm error 71 |
LCP |
Lenght of Security Pool Security pool for ADASEC
Important for performance! |
LP -- |
204 |
-- |
Access to security file |
LDEUQP |
Length of Unique Descriptor Pool The unique descriptor (UQ) pool (value + 11 bytes) should hold all UQ descriptors that are being changed by all transactions Checks whether UQ DE value exist |
-- |
197 198 |
-- |
-- |
LDTP |
Length of Distributed Transaction Processing Area (Work part 4) For use with DTP=RM (resource manager) |
DTP=RM LP |
17 |
4 |
-- |
LFIOP |
Asynchronous Buffer Pool Control Asynchronous buffer flush I/O pool for Keep it small, approx. 25-40% of LBP 0=synchronous BF 1=25% of LBP n=user defined In 31-bit mode (EXCPVR), the work pool is automatically allocated above the 16-megabyte line 64-bit mode is also possible: "EXCPVR is being used for this run in ESA64 mode"
Important for performance! |
LBP LP TFLUSH FIC |
8 |
-- |
high values = wait time, high channel and disk load |
LFP |
Length of Internal Format Buffer Pool In 31-bit mode (EXCPVR), the format pool is automatically allocated above the 16-megabyte line 64-bit mode is also possible: "EXCPVR is being used for this run in ESA64 mode" Since ADA7, HWM are always close to 100% Still sequential searching
Important for performance! |
-- |
42 45 |
-- -- |
low values = format overwrites Parm error 13 |
LI |
Length of Tables of ISNs (TBI) Store ISN lists (overflow ISNs or saved ISN lists), which are identified by a CID and system UID LI=(# TBI-elements, limited by NQCID) * (size TBI element) Max size see NSISN
Important for performance! |
NSISN NQCID |
71 |
-- |
Parm error 10 |
LOCAL |
Local Nucleus YES=Isolated NO=Calls from Entire Net-Work nodes are available |
-- |
-- |
-- |
Parm error 74 |
LOGGING |
Command Logging Control Command logging for the Adabas session. UEX4 needs LOGGING=YES |
CL DUALCLD DUALCLS LOGCB LOGCLEX LOGFB LOGIB LOGIO LOGRB LOGSB LOGUX LOGVB LOGSIZE UEX4
|
-- |
-- |
Active logging (dual or single) can cause performance problems. I/Os are not done by a subtask |
LOGSIZE |
Maximum Command Logging Size The maximum blocksize for the sequential command log Default value of QBLKSIZE |
LOGGING QBLKSIZE
|
-- |
-- |
Active sequential logging causes performance problems. I/Os are not done by a subtask. Tape mount or full disk will lock the nucleus. |
LP |
Length of Data Protection Area (Work Part 1) Specifies the number of blocks to allocate to the Work data protecxtion area (part 1 of 4). Changes of LP will be automatically detected during autorestart
Important for performance! |
LBP TFLUSH LFIOP TT LWKP2 WORK-3 WORK-4 FIC
|
9 95 8 |
15 -- -- |
low values = high number of buffer flushes high values = probably not used Parm errors 17, 18 |
LQ |
Length of Sequential Command Table Specifies the number of bytes for the TBQ elements for read sequences: physical = 56 bytes logical = 86 bytes + length compr. DE value max. length 68 + 253 = 331 bytes x possible CIDs ADA74: TBQ element = approx. 120 bytes (?)
|
NQCID |
70 |
-- |
Parm error 11 |
LWP |
Work Pool, contains of: - Sort area - Intermediate UB - DVT (32KB) - Temp. transl. int.    formats (32KB) - I/O areas, WORK2/3 - LOGIO of CLOG In 31-bit mode (EXCPVR), the work pool is automatically allocated above the 16-megabyte line 64-bit mode is also possible: "EXCPVR is being used for this run in ESA64 mode"
Important for performance! |
  LS LU -- -- -- -- LOGIO LOGGING PREFE |
164 1 152 -- -- 45 -- 88 |
-- 3 -- -- -- -- -- 1 |
low values = throw backs, WORK2 I/Os, no selection of CQ, ENQ time, ECBs Parm errors 14, 16, 39, 67 |