r - Memory leak with closed connections -


i have r application interacting java daemon via stdin , stdout in infinite loop, seems have memory leaks. simplified r app:

while (true) {     con <- file('stdin', open = 'r', blocking = true)     line <- scan(con, = character(0), nlines = 1, quiet = true)     close(con) }

this loop ends using more , more ram, , if manually gc() after close(con) call, memory footprint seems ok while, grows forever.

a basic script confirm this:

rscript --vanilla -e "while(true)cat(runif(1),'\n')" | rscript --vanilla -e "cat(sys.getpid(), '\n');while (true) {con <- file('stdin', open = 'r', blocking = true);line <- scan(con, = character(0), nlines = 1, quiet = true);close(con);gc()}"

this start 2 r processes: 1 writing stdout , other reading stdin connected pipe (and second printing pid can monitor related memory usage):

enter image description here

i'm not sure i'm doing wrong, love stop memory leak highly appreciated.

indeed (about reading on r-devel); notably, memory leak has been plugged in development version of r, patch gabor csardi.


Comments

Post a Comment

Popular posts from this blog

php - trouble displaying mysqli database results in correct order -

i have table in database stores events , date expire. want display events on website display current events first expired events after? i have tried following sql $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; but returns expired results first due expirydate being ordered asc in query. my tbl_notice structure looks this noticeid => int(4) notice => varchar(100) noticedesc => text noticedate => timestamp noticeimg => varchar(40) expirydate => datetime expired => int(1) 0 current or 1 expired my php code is $sql = "select noticeid, notice, noticedesc, noticeimg, noticedate, expirydate tbl_notices group noticeid ,expired order expirydate asc"; $result = mysqli_query($conn,$sql); if ($result->num_rows > 0) { // output data of each row while($row = $result->fetch_assoc()) { ...
Read more

depending on nth recurrence of job in control M -

we have need in control m follows. have 2 daily jobs in control m job , job b. job has recurrence count of 5 per day , job b needs depend on 3rd occurrence of job a. how can achieved in control m configuration? thanks.. use runcount variable below. do below job a do not add out condition in out condition tab in steps tab: on(stmt=*, code=runcount=3) addcondtion specify condition name ex: a-ok for job b do below. specify in condition below. a-ok let me know if u need complete structure
Read more

sql server - Cannot query correctly (MSSQL - PHP - JSON) -

i have little problem on project. , turns out query result returns nothing when value of first name or last name has 'ñ' in it. here's code config.php: <?php ini_set('mssql.charset', 'utf-8'); header('content-type: text/html; charset=utf-8'); $servername = "192.168.1.21"; /* ip add of db server */ $connection = array("database" => "db", "uid" => "?", "pwd" => "***"); $conn = sqlsrv_connect($servername, $connection); if(!$conn){ echo "connection not established."; die(print_r(sqlsrv_errors(), true)); } ?> myquery: $idnumber = $_post["idnum"]; $response = array(); $query2 = "select clname, cfname, cmname, cqualifier student cidno = '$idnumber'"; try{ $stmt2 = sqlsrv_query($conn, $query2); } catch(pdoexeption $ex){ $response["success"] = 0; $response["message"] = "d...
Read more