UPDATE VERY SLOW!!!

[amitstora]

Hi!

Working on Oracle v8i with OS as win2000.

Query:

Mu update is taking lot of time and the performance of the database is also slow and this happened just to-day.It was working fine before this:

Query:

UPDATE TABLE_NAME
SET COLUMN_NAME = LTRIM(RTRIM(COLUMN_NAME))
/

Query hangs here for indefinite period.

My INIT.ORA parameter file is as under:

SQL> sho parameter

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
O7_DICTIONARY_ACCESSIBILITY boolean TRUE
active_instance_count integer
always_anti_join string NESTED_LOOPS
always_semi_join string STANDARD
aq_tm_processes integer 0
audit_trail string NONE
background_dump_dest string D:\Oracle\admin\PVPL\bdump
backup_tape_io_slaves boolean FALSE
bitmap_merge_area_size integer 1048576
blank_trimming boolean FALSE
buffer_pool_keep string

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
buffer_pool_recycle string
commit_point_strength integer 1
compatible string 8.1.0
control_file_record_keep_time integer 7
control_files string D:\Oracle\oradata\PVPL\control
01.ctl, D:\Oracle\oradata\PVPL
\control02.ctl, D:\Oracle\orad
ata\PVPL\control03.ctl
cpu_count integer 1
create_bitmap_area_size integer 8388608
cursor_sharing string EXACT

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
cursor_space_for_time boolean FALSE
db_block_buffers integer 2443
db_block_checking boolean FALSE
db_block_checksum boolean FALSE
db_block_lru_latches integer 1
db_block_max_dirty_target integer 2443
db_block_size integer 8192
db_domain string
db_file_direct_io_count integer 64
db_file_multiblock_read_count integer 8
db_file_name_convert string

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
db_files integer 1024
db_name string PVPL
db_writer_processes integer 1
dblink_encrypt_login boolean FALSE
dbwr_io_slaves integer 0
disk_asynch_io boolean TRUE
distributed_transactions integer 500
dml_locks integer 600
enqueue_resources integer 1644
event string
fast_start_io_target integer 2443

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
fast_start_parallel_rollback string LOW
fixed_date string
gc_defer_time integer 10
gc_files_to_locks string
gc_releasable_locks integer 0
gc_rollback_locks string 0-128=32!8REACH
global_names boolean FALSE
hash_area_size integer 163840
hash_join_enabled boolean TRUE
hash_multiblock_io_count integer 0
hi_shared_memory_address integer 0

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
hs_autoregister boolean TRUE
ifile file
instance_groups string
instance_name string PVPL
instance_number integer 0
java_max_sessionspace_size integer 0
java_pool_size string 20971520
java_soft_sessionspace_limit integer 0
job_queue_interval integer 10
job_queue_processes integer 4
large_pool_size string 25085760

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
license_max_sessions integer 0
license_max_users integer 0
license_sessions_warning integer 0
lm_locks integer 12000
lm_ress integer 6000
local_listener string
lock_name_space string
lock_sga boolean FALSE
log_archive_dest string
log_archive_dest_1 string
log_archive_dest_2 string

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
log_archive_dest_3 string
log_archive_dest_4 string
log_archive_dest_5 string
log_archive_dest_state_1 string enable
log_archive_dest_state_2 string enable
log_archive_dest_state_3 string enable
log_archive_dest_state_4 string enable
log_archive_dest_state_5 string enable
log_archive_duplex_dest string
log_archive_format string ARC%S.%T
log_archive_max_processes integer 1

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
log_archive_min_succeed_dest integer 1
log_archive_start boolean FALSE
log_archive_trace integer 0
log_buffer integer 32768
log_checkpoint_interval integer 10000
log_checkpoint_timeout integer 1800
log_checkpoints_to_alert boolean FALSE
log_file_name_convert string
max_commit_propagation_delay integer 700
max_dump_file_size string 10240
max_enabled_roles integer 30

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
max_rollback_segments integer 37
mts_circuits integer 170
mts_dispatchers string (PROTOCOL=TCP)(PRE=oracle.auro
ra.server.SGiopServer)
mts_listener_address string
mts_max_dispatchers integer 5
mts_max_servers integer 20
mts_multiple_listeners boolean FALSE
mts_servers integer 1
mts_service string PVPL
mts_sessions integer 165

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
nls_calendar string
nls_comp string
nls_currency string
nls_date_format string
nls_date_language string
nls_dual_currency string
nls_iso_currency string
nls_language string AMERICAN
nls_numeric_characters string
nls_sort string
nls_territory string AMERICA

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
nls_time_format string
nls_time_tz_format string
nls_timestamp_format string
nls_timestamp_tz_format string
object_cache_max_size_percent integer 10
object_cache_optimal_size integer 102400
open_cursors integer 200
open_links integer 4
open_links_per_instance integer 4
optimizer_features_enable string 8.1.6
optimizer_index_caching integer 0

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
optimizer_index_cost_adj integer 100
optimizer_max_permutations integer 80000
optimizer_mode string CHOOSE
optimizer_percent_parallel integer 0
oracle_trace_collection_name string
oracle_trace_collection_path string %ORACLE_HOME%\OTRACE\ADMIN\CDF
\
oracle_trace_collection_size integer 5242880
oracle_trace_enable boolean FALSE
oracle_trace_facility_name string oracled
oracle_trace_facility_path string %ORACLE_HOME%\OTRACE\ADMIN\FDF

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
\
os_authent_prefix string
os_roles boolean FALSE
parallel_adaptive_multi_user boolean FALSE
parallel_automatic_tuning boolean FALSE
parallel_broadcast_enabled boolean FALSE
parallel_execution_message_size integer 2148
parallel_instance_group string
parallel_max_servers integer 5
parallel_min_percent integer 0
parallel_min_servers integer 0

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
parallel_server boolean FALSE
parallel_server_instances integer 1
parallel_threads_per_cpu integer 2
partition_view_enabled boolean FALSE
plsql_v2_compatibility boolean FALSE
pre_page_sga boolean FALSE
processes integer 150
query_rewrite_enabled boolean FALSE
query_rewrite_integrity string enforced
rdbms_server_dn string
read_only_open_delayed boolean FALSE

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
recovery_parallelism integer 0
remote_dependencies_mode string TIMESTAMP
remote_login_passwordfile string EXCLUSIVE
remote_os_authent boolean FALSE
remote_os_roles boolean FALSE
replication_dependency_tracking boolean TRUE
resource_limit boolean FALSE
resource_manager_plan string
rollback_segments string
row_locking string always
serial_reuse string DISABLE

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
serializable boolean FALSE
service_names string PVPL
session_cached_cursors integer 0
session_max_open_files integer 10
sessions integer 170
shared_memory_address integer 0
shared_pool_reserved_size string 786432
shared_pool_size string 15728640
sort_area_retained_size integer 81920
sort_area_size integer 81920
sort_multiblock_read_count integer 2

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
sql92_security boolean FALSE
sql_trace boolean FALSE
sql_version string NATIVE
standby_archive_dest string %ORACLE_HOME%\RDBMS
star_transformation_enabled string FALSE
tape_asynch_io boolean TRUE
text_enable boolean FALSE
thread integer 0
timed_os_statistics integer 0
timed_statistics boolean FALSE
transaction_auditing boolean TRUE

NAME TYPE VALUE
------------------------------------ ------- ------------------------------
transactions integer 187
transactions_per_rollback_segment integer 5
use_indirect_data_buffers boolean FALSE
user_dump_dest string D:\Oracle\admin\PVPL\udump
utl_file_dir string

So what and where should I be checking!

Thanks & Regards,

Amit.

[jmodic]

Update hangs for indefinite period? Have you checked if some other session is holding locks on the table/rows you are updating?