MySQL memory allocation
Hi, Could you please tell how I can tell how much memory does mysql server allocate on a linux box? I tried doing: top -b -n 1 | grep mysql But, it printed out bunch of processes for mysql. Are these all using shared memory so each line gives you the total amount for mysql? How can one interpret the results of this top, i.e. how should I read Virtual/Resident/Shared columns for all these processes and find out how much shared + (resident + swap: virtual) memory it uses? Results of TOP for mysql: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 8205 mysql 12 0 75524 28M 26896 S 4.8 0.7 3:15 1 mysqld 2150 mysql 9 0 75524 28M 26896 S 0.4 0.7 3:04 1 mysqld 32011 root 9 0 628 500 500 S 0.0 0.0 0:00 0 mysqld_safe 32033 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:08 0 mysqld 32035 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:00 0 mysqld 32036 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:04 0 mysqld 1321 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 1 mysqld 1323 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:17 0 mysqld 2112 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:20 0 mysqld 2131 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:04 0 mysqld 2132 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:34 1 mysqld 2133 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:04 1 mysqld 2134 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:12 0 mysqld 2135 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 0 mysqld 2136 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:59 1 mysqld 2137 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:43 0 mysqld 2142 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:12 0 mysqld 8080 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:58 0 mysqld 8082 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:52 1 mysqld 8197 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:43 1 mysqld 8204 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:16 1 mysqld 16010 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 0 mysqld 16011 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:58 1 mysqld 16138 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:52 1 mysqld 4074 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:16 0 mysqld 17331 mysql 9 0 75524 28M 26896 S 0.0 0.7 1:44 0 mysqld 17337 mysql 9 0 75524 28M 26896 S 0.0 0.7 1:59 0 mysqld 22847 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:53 1 mysqld 22912 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:49 0 mysqld 22944 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:48 1 mysqld 23101 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:38 0 mysqld 23102 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:43 0 mysqld 23124 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:44 1 mysqld 23168 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:46 1 mysqld Thanks. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: MySQL memory allocation
On Tue, 2006-10-31 at 01:30 -0800, Cabbar Duzayak wrote: Hi, Could you please tell how I can tell how much memory does mysql server allocate on a linux box? I tried doing: top -b -n 1 | grep mysql But, it printed out bunch of processes for mysql. Are these all using shared memory so each line gives you the total amount for mysql? How can one interpret the results of this top, i.e. how should I read Virtual/Resident/Shared columns for all these processes and find out how much shared + (resident + swap: virtual) memory it uses? Results of TOP for mysql: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 8205 mysql 12 0 75524 28M 26896 S 4.8 0.7 3:15 1 mysqld Looks to me it is only using 28MB Resident Memory. (not sure why there are so many instances of mysqld) PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 26431 mysql 15 0 503m 340m S 0.0 72.0 466:05.74 mysqld I'm using 340M on mine. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: MySQL memory allocation
Which thread library is the mysqld linked against? Linuxthreads shows each thread as a separate process in top or ps output. All threads share the same memory. From your output, it is likely that you are using linuxthreads(all pids having the same VSZ and RES memory). Regards, Ravi Cabbar Duzayak wrote: Hi, Could you please tell how I can tell how much memory does mysql server allocate on a linux box? I tried doing: top -b -n 1 | grep mysql But, it printed out bunch of processes for mysql. Are these all using shared memory so each line gives you the total amount for mysql? How can one interpret the results of this top, i.e. how should I read Virtual/Resident/Shared columns for all these processes and find out how much shared + (resident + swap: virtual) memory it uses? Results of TOP for mysql: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 8205 mysql 12 0 75524 28M 26896 S 4.8 0.7 3:15 1 mysqld 2150 mysql 9 0 75524 28M 26896 S 0.4 0.7 3:04 1 mysqld 32011 root 9 0 628 500 500 S 0.0 0.0 0:00 0 mysqld_safe 32033 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:08 0 mysqld 32035 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:00 0 mysqld 32036 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:04 0 mysqld 1321 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 1 mysqld 1323 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:17 0 mysqld 2112 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:20 0 mysqld 2131 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:04 0 mysqld 2132 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:34 1 mysqld 2133 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:04 1 mysqld 2134 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:12 0 mysqld 2135 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 0 mysqld 2136 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:59 1 mysqld 2137 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:43 0 mysqld 2142 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:12 0 mysqld 8080 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:58 0 mysqld 8082 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:52 1 mysqld 8197 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:43 1 mysqld 8204 mysql 9 0 75524 28M 26896 S 0.0 0.7 3:16 1 mysqld 16010 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:51 0 mysqld 16011 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:58 1 mysqld 16138 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:52 1 mysqld 4074 mysql 9 0 75524 28M 26896 S 0.0 0.7 2:16 0 mysqld 17331 mysql 9 0 75524 28M 26896 S 0.0 0.7 1:44 0 mysqld 17337 mysql 9 0 75524 28M 26896 S 0.0 0.7 1:59 0 mysqld 22847 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:53 1 mysqld 22912 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:49 0 mysqld 22944 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:48 1 mysqld 23101 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:38 0 mysqld 23102 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:43 0 mysqld 23124 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:44 1 mysqld 23168 mysql 9 0 75524 28M 26896 S 0.0 0.7 0:46 1 mysqld Thanks. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
