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Commitb6e5823

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Marginal hacks to move some processing out of the per-client-message
processing loop; avoids extra overhead when using parse/bind/executemessages instead of single Query message.
1 parentfcb90fd commitb6e5823

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1 file changed

+45
-44
lines changed

1 file changed

+45
-44
lines changed

‎src/backend/tcop/postgres.c

Lines changed: 45 additions & 44 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.358 2003/08/12 18:23:21 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.359 2003/08/12 18:52:38 tgl Exp $
1212
*
1313
* NOTES
1414
* this is the "main" module of the postgres backend and
@@ -2023,7 +2023,7 @@ PostgresMain(int argc, char *argv[], const char *username)
20232023
GucSourcegucsource;
20242024
char*tmp;
20252025
intfirstchar;
2026-
StringInfoinput_message;
2026+
StringInfoDatainput_message;
20272027
volatileboolsend_rfq= true;
20282028

20292029
/*
@@ -2646,7 +2646,7 @@ PostgresMain(int argc, char *argv[], const char *username)
26462646
if (!IsUnderPostmaster)
26472647
{
26482648
puts("\nPOSTGRES backend interactive interface ");
2649-
puts("$Revision: 1.358 $ $Date: 2003/08/12 18:23:21 $\n");
2649+
puts("$Revision: 1.359 $ $Date: 2003/08/12 18:52:38 $\n");
26502650
}
26512651

26522652
/*
@@ -2765,35 +2765,36 @@ PostgresMain(int argc, char *argv[], const char *username)
27652765
MemoryContextSwitchTo(MessageContext);
27662766
MemoryContextResetAndDeleteChildren(MessageContext);
27672767

2768-
input_message=makeStringInfo();
2768+
initStringInfo(&input_message);
27692769

27702770
/*
2771-
* (1) tell the frontend we're ready for a new query.
2771+
* (1) If we've reached idle state, tell the frontend we're ready
2772+
* for a new query.
27722773
*
27732774
* Note: this includes fflush()'ing the last of the prior output.
2775+
*
2776+
* This is also a good time to send collected statistics to the
2777+
* collector, and to update the PS stats display. We avoid doing
2778+
* those every time through the message loop because it'd slow down
2779+
* processing of batched messages.
27742780
*/
27752781
if (send_rfq)
27762782
{
2777-
ReadyForQuery(whereToSendOutput);
2778-
send_rfq= false;
2779-
}
2783+
pgstat_report_tabstat();
27802784

2781-
/* ----------
2782-
* Tell the statistics collector what we've collected
2783-
* so far.
2784-
* ----------
2785-
*/
2786-
pgstat_report_tabstat();
2785+
if (IsTransactionBlock())
2786+
{
2787+
set_ps_display("idle in transaction");
2788+
pgstat_report_activity("<IDLE> in transaction");
2789+
}
2790+
else
2791+
{
2792+
set_ps_display("idle");
2793+
pgstat_report_activity("<IDLE>");
2794+
}
27872795

2788-
if (IsTransactionBlock())
2789-
{
2790-
set_ps_display("idle in transaction");
2791-
pgstat_report_activity("<IDLE> in transaction");
2792-
}
2793-
else
2794-
{
2795-
set_ps_display("idle");
2796-
pgstat_report_activity("<IDLE>");
2796+
ReadyForQuery(whereToSendOutput);
2797+
send_rfq= false;
27972798
}
27982799

27992800
/*
@@ -2815,7 +2816,7 @@ PostgresMain(int argc, char *argv[], const char *username)
28152816
/*
28162817
* (3) read a command (loop blocks here)
28172818
*/
2818-
firstchar=ReadCommand(input_message);
2819+
firstchar=ReadCommand(&input_message);
28192820

28202821
/*
28212822
* (4) disable async signal conditions again.
@@ -2848,8 +2849,8 @@ PostgresMain(int argc, char *argv[], const char *username)
28482849
{
28492850
constchar*query_string;
28502851

2851-
query_string=pq_getmsgstring(input_message);
2852-
pq_getmsgend(input_message);
2852+
query_string=pq_getmsgstring(&input_message);
2853+
pq_getmsgend(&input_message);
28532854

28542855
exec_simple_query(query_string);
28552856

@@ -2864,18 +2865,18 @@ PostgresMain(int argc, char *argv[], const char *username)
28642865
intnumParams;
28652866
Oid*paramTypes=NULL;
28662867

2867-
stmt_name=pq_getmsgstring(input_message);
2868-
query_string=pq_getmsgstring(input_message);
2869-
numParams=pq_getmsgint(input_message,2);
2868+
stmt_name=pq_getmsgstring(&input_message);
2869+
query_string=pq_getmsgstring(&input_message);
2870+
numParams=pq_getmsgint(&input_message,2);
28702871
if (numParams>0)
28712872
{
28722873
inti;
28732874

28742875
paramTypes= (Oid*)palloc(numParams*sizeof(Oid));
28752876
for (i=0;i<numParams;i++)
2876-
paramTypes[i]=pq_getmsgint(input_message,4);
2877+
paramTypes[i]=pq_getmsgint(&input_message,4);
28772878
}
2878-
pq_getmsgend(input_message);
2879+
pq_getmsgend(&input_message);
28792880

28802881
exec_parse_message(query_string,stmt_name,
28812882
paramTypes,numParams);
@@ -2888,17 +2889,17 @@ PostgresMain(int argc, char *argv[], const char *username)
28882889
* this message is complex enough that it seems best to
28892890
* put the field extraction out-of-line
28902891
*/
2891-
exec_bind_message(input_message);
2892+
exec_bind_message(&input_message);
28922893
break;
28932894

28942895
case'E':/* execute */
28952896
{
28962897
constchar*portal_name;
28972898
intmax_rows;
28982899

2899-
portal_name=pq_getmsgstring(input_message);
2900-
max_rows=pq_getmsgint(input_message,4);
2901-
pq_getmsgend(input_message);
2900+
portal_name=pq_getmsgstring(&input_message);
2901+
max_rows=pq_getmsgint(&input_message,4);
2902+
pq_getmsgend(&input_message);
29022903

29032904
exec_execute_message(portal_name,max_rows);
29042905
}
@@ -2914,7 +2915,7 @@ PostgresMain(int argc, char *argv[], const char *username)
29142915
/* switch back to message context */
29152916
MemoryContextSwitchTo(MessageContext);
29162917

2917-
if (HandleFunctionRequest(input_message)==EOF)
2918+
if (HandleFunctionRequest(&input_message)==EOF)
29182919
{
29192920
/* lost frontend connection during F message input */
29202921

@@ -2939,9 +2940,9 @@ PostgresMain(int argc, char *argv[], const char *username)
29392940
intclose_type;
29402941
constchar*close_target;
29412942

2942-
close_type=pq_getmsgbyte(input_message);
2943-
close_target=pq_getmsgstring(input_message);
2944-
pq_getmsgend(input_message);
2943+
close_type=pq_getmsgbyte(&input_message);
2944+
close_target=pq_getmsgstring(&input_message);
2945+
pq_getmsgend(&input_message);
29452946

29462947
switch (close_type)
29472948
{
@@ -2987,9 +2988,9 @@ PostgresMain(int argc, char *argv[], const char *username)
29872988
intdescribe_type;
29882989
constchar*describe_target;
29892990

2990-
describe_type=pq_getmsgbyte(input_message);
2991-
describe_target=pq_getmsgstring(input_message);
2992-
pq_getmsgend(input_message);
2991+
describe_type=pq_getmsgbyte(&input_message);
2992+
describe_target=pq_getmsgstring(&input_message);
2993+
pq_getmsgend(&input_message);
29932994

29942995
switch (describe_type)
29952996
{
@@ -3010,13 +3011,13 @@ PostgresMain(int argc, char *argv[], const char *username)
30103011
break;
30113012

30123013
case'H':/* flush */
3013-
pq_getmsgend(input_message);
3014+
pq_getmsgend(&input_message);
30143015
if (whereToSendOutput==Remote)
30153016
pq_flush();
30163017
break;
30173018

30183019
case'S':/* sync */
3019-
pq_getmsgend(input_message);
3020+
pq_getmsgend(&input_message);
30203021
finish_xact_command();
30213022
send_rfq= true;
30223023
break;

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