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2705931 - SAP IQ hangs or is very slow

Symptom

SAP IQ 16 has unexpectedly bad performance or a hang.

PSTACK taken of the server includes the following calls:

st_txnMgr::WaitForTLVReplay
st_txnMgr::BeginTransaction2
st_command::st_command
df_dmlcommand::df_dmlcommand
df_DescribeCursor::df_DescribeCursor
st_iqdml::DescribeCursor
UIQDML_DescribeCursor
st_SAIQInterfaceInfo::callFunction()
st_SAIQInterface::RunIQFunc
st_SAIQInterface::Execute

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Environment

  •  SAP IQ 16

Product

SAP IQ 16.0

Keywords

#2 0x00007fc43b3c15b8 in st_txnMgr::WaitForTLVReplay(st_connection*, hos_condvar_lock&, unsigned long long, int*) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#3 0x00007fc43b3c9093 in st_txnMgr::BeginTransaction2(int*, int) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#4 0x00007fc43a08c19c in st_command::st_command(st_command::st_cmdtype, a_statement const*, int) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#5 0x00007fc438eae953 in df_dmlcommand::df_dmlcommand(a_statement*, UIConnection*, UICursor*, df_dmlcommand::window_create_flag, a_cursor_spec*, st_command::st_cmdtype, a_plist_node*) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#6 0x00007fc438eaef0b in df_DescribeCursor::df_DescribeCursor(a_statement*, UIConnection*, UICursor*, a_cursor_spec*) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#7 0x00007fc43a0de05b in st_iqdml::DescribeCursor(a_statement*, UIConnection*, UICursor*, a_cursor_spec*) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#8 0x00007fc438e49641 in UIQDML_DescribeCursor () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#9 0x00007fc43a0e56c6 in st_SAIQInterfaceInfo::callFunction() () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#10 0x00007fc43a150fae in st_SAIQInterface::RunIQFunc(st_SAIQInterfaceInfo*) () from /APP/IP1/BINARY/IQ-16_0/bin64/../lib64/libiq16.so
#11 0x00007fc43a0e603a in st_SAIQInterface::Execute(int, void*, unsigned int (
, KBA , BC-SYB-IQ , Sybase IQ , Problem

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