04-01-2014
There may be repeated rogue queries that are trying to return vast amounts of data. If the user is disconnected/timed out/gets bored, they may well re-issue. I would consider reading the application logs to check that the queries are indeed going to return suitable data volumes.
This was learned from prolonged painful experience eventually leading to better validation and sanity checking on the application server before the query was executed.
Robin
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LEARN ABOUT PHP
pg_send_query
PG_SEND_QUERY(3) PG_SEND_QUERY(3)
pg_send_query - Sends asynchronous query
SYNOPSIS
bool pg_send_query (resource $connection, string $query)
DESCRIPTION
pg_send_query(3) sends a query or queries asynchronously to the $connection. Unlike pg_query(3), it can send multiple queries at once to
PostgreSQL and get the results one by one using pg_get_result(3).
Script execution is not blocked while the queries are executing. Use pg_connection_busy(3) to check if the connection is busy (i.e. the
query is executing). Queries may be cancelled using pg_cancel_query(3).
Although the user can send multiple queries at once, multiple queries cannot be sent over a busy connection. If a query is sent while the
connection is busy, it waits until the last query is finished and discards all its results.
PARAMETERS
o $connection
- PostgreSQL database connection resource.
o $query
- The SQL statement or statements to be executed. Data inside the query should be properly escaped.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
Use pg_get_result(3) to determine the query result.
EXAMPLES
Example #1
pg_send_query(3) example
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
if (!pg_connection_busy($dbconn)) {
pg_send_query($dbconn, "select * from authors; select count(*) from authors;");
}
$res1 = pg_get_result($dbconn);
echo "First call to pg_get_result(): $res1
";
$rows1 = pg_num_rows($res1);
echo "$res1 has $rows1 records
";
$res2 = pg_get_result($dbconn);
echo "Second call to pg_get_result(): $res2
";
$rows2 = pg_num_rows($res2);
echo "$res2 has $rows2 records
";
?>
The above example will output:
First call to pg_get_result(): Resource id #3
Resource id #3 has 3 records
Second call to pg_get_result(): Resource id #4
Resource id #4 has 1 records
SEE ALSO
pg_query(3), pg_cancel_query(3), pg_get_result(3), pg_connection_busy(3).
PHP Documentation Group PG_SEND_QUERY(3)