Date: Thu, 10 Jan 2013 19:38:08 +0200 From: Haris Papadopoulos <haris@softways.gr> To: freebsd-ports-bugs@freebsd.org Subject: databases/firebird25-server usage severe issues Message-ID: <50EEFC80.2010504@softways.gr>
next in thread | raw e-mail | index | archive | help
Hi, firebird-server-2.5.1_2 built successfully from ports. FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 First observation: Trying to run Classic Server via inetd. When my Tomcat application server starts connections to multiple databases with 1 connection to each database(this is intented to be a web server) I notice that several fb_inet_server processes reach 100% CPU load and stay there until after some minutes they are automatically shut down and then I get infinite errors in firebird log like: semop failed errno = 22. I suspected that this has to do with the limited number of semaphores provided by FreeBSD so I increased them in /boot/loader.conf and in /etc/sysctl.conf (I must say too much for testing). Here is the output of # sysctl -a | grep ipc kern.ipc.maxsockbuf: 2097152 kern.ipc.sockbuf_waste_factor: 8 kern.ipc.somaxconn: 2048 kern.ipc.max_linkhdr: 16 kern.ipc.max_protohdr: 60 kern.ipc.max_hdr: 76 kern.ipc.max_datalen: 92 kern.ipc.nmbjumbo16: 3200 kern.ipc.nmbjumbo9: 6400 kern.ipc.nmbjumbop: 12800 kern.ipc.nmbclusters: 25600 kern.ipc.piperesizeallowed: 1 kern.ipc.piperesizefail: 0 kern.ipc.pipeallocfail: 0 kern.ipc.pipefragretry: 0 kern.ipc.pipekva: 65536 kern.ipc.maxpipekva: 133775360 kern.ipc.msgseg: 2048 kern.ipc.msgssz: 8 kern.ipc.msgtql: 1024 kern.ipc.msgmnb: 2048 kern.ipc.msgmni: 2048 kern.ipc.msgmax: 16384 kern.ipc.semaem: 32767 kern.ipc.semvmx: 65534 kern.ipc.semusz: 2048 kern.ipc.semume: 2048 kern.ipc.semopm: 2048 kern.ipc.semmsl: 2048 kern.ipc.semmnu: 2048 kern.ipc.semmns: 2048 kern.ipc.semmni: 2048 kern.ipc.shm_allow_removed: 1 kern.ipc.shm_use_phys: 0 kern.ipc.shmall: 1048566 kern.ipc.shmseg: 2048 kern.ipc.shmmni: 2048 kern.ipc.shmmin: 1 kern.ipc.shmmax: 4294926336 kern.ipc.maxsockets: 25600 kern.ipc.numopensockets: 32 kern.ipc.nsfbufsused: 0 kern.ipc.nsfbufspeak: 0 kern.ipc.nsfbufs: 0 security.jail.param.allow.sysvipc: 0 security.jail.sysvipc_allowed: 0 The problem remained. Testing: Then I enabled the audit-trace facility of Firebird and I created an empty database. When I connect to it via isql-fb: isql-fb -USER SYSDBA -PASS masterkey firstdb.fdb I get the following in my audit log: 2013-01-04T12:06:29.5840 (16180:0x8006f3590) TRACE_INIT SESSION_1 Firebird Audit 2013-01-04T12:06:29.5840 (16180:0x8006f3590) ATTACH_DATABASE /var/db/firebird/security2.fdb (ATT_16, SYSDBA:NONE, NONE, ) 2013-01-04T12:06:29.5870 (16180:0x8006f3590) COMPILE_BLR /var/db/firebird/security2.fdb (ATT_16, SYSDBA:NONE, NONE, ) ---------------------------------------------------------- 0 blr_version5, 1 blr_begin, 2 blr_message, 1, 4,0, 6 blr_long, 0, 8 blr_long, 0, 10 blr_short, 0, 12 blr_text, 66,0, 15 blr_message, 0, 1,0, 19 blr_cstring, 129,0, 22 blr_receive, 0, 24 blr_begin, 25 blr_for, 26 blr_rse, 1, 28 blr_relation, 9, 'R','D','B','$','U','S','E','R','S', 0, 40 blr_first, 41 blr_literal, blr_short, 0, 1,0... 7 ms 2013-01-04T12:06:29.5870 (16180:0x8006f3590) START_TRANSACTION /var/db/firebird/security2.fdb (ATT_16, SYSDBA:NONE, NONE, ) (TRA_35, CONCURRENCY | WAIT | READ_ONLY) 2013-01-04T12:06:29.5880 (16180:0x8006f3590) ROLLBACK_TRANSACTION /var/db/firebird/security2.fdb (ATT_16, SYSDBA:NONE, NONE, ) (TRA_35, CONCURRENCY | WAIT | READ_ONLY) 0 ms, 1 read(s), 1 write(s), 1 fetch(es), 1 mark(s) 2013-01-04T12:06:29.6840 (16180:0x8006f1c40) TRACE_INIT SESSION_1 Firebird Audit 2013-01-04T12:06:29.6840 (16180:0x8006f1c40) ATTACH_DATABASE /usr/local/firebird.data/firstdb.fdb (ATT_7, SYSDBA:NONE, NONE, ) 2013-01-04T12:06:29.6850 (16180:0x8006f1c40) START_TRANSACTION /usr/local/firebird.data/firstdb.fdb (ATT_7, SYSDBA:NONE, NONE, ) (TRA_14, CONCURRENCY | WAIT | READ_WRITE) 2013-01-04T12:06:29.6860 (16180:0x8006f1c40) START_TRANSACTION /usr/local/firebird.data/firstdb.fdb (ATT_7, SYSDBA:NONE, NONE, ) (TRA_15, READ_COMMITTED | NO_REC_VERSION | WAIT | READ_WRITE) The ROLLBACK_TRANSACTION line doesn't seem normal to me. Staying connected, I run fuser /var/db/firebird/security2.fdb and it shows that the process of isql-fb is still attached to the security database (no complaints in firebird.log). If I run: procstat -t 16180 # (16180 is the PID of fb_inet_server in my current test) I get: PID TID COMM TDNAME CPU PRI STATE WCHAN 16180 101202 isql-fb - 9 126 sleep ttyin 16180 104970 isql-fb - 1 120 sleep usem 16180 106138 isql-fb - 8 120 sleep usem 16180 106139 isql-fb - 1 120 sleep semwait 16180 106140 isql-fb - 1 124 sleep semwait If I run: procstat -k 16180 I get: PID TID COMM TDNAME KSTACK 16180 101202 isql-fb - mi_switch sleepq_catch_signals sleepq_wait_sig _cv_wait_sig tty_wait ttydisc_read ttydev_read devfs_read_f dofileread kern_readv sys_read amd64_syscall Xfast_syscall 16180 104970 isql-fb - mi_switch sleepq_catch_signals sleepq_wait_sig _sleep do_sem_wait __umtx_op_sem_wait amd64_syscall Xfast_syscall 16180 106138 isql-fb - mi_switch sleepq_catch_signals sleepq_timedwait_sig _sleep do_sem_wait __umtx_op_sem_wait amd64_syscall Xfast_syscall 16180 106139 isql-fb - mi_switch sleepq_catch_signals sleepq_wait_sig _sleep sys_semop amd64_syscall Xfast_syscall 16180 106140 isql-fb - mi_switch sleepq_catch_signals sleepq_wait_sig _sleep sys_semop amd64_syscall Xfast_syscall If I make another connection to the same or another database keeping this one, I see two attachments to security2.fdb. The isql-fb processes stay attached to security2.fdb as long as they stay connected to the database. Since this doesn't happen with Firebird 2.1 on another identical server I suspect that this might be a bug. I also tested the same version (2.5.1) on my laptop: FreeBSD 9.1-PRERELEASE FreeBSD 9.1 i386 I had the exact same behaviour. Thanks in advance, Haris Papadopoulos
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?50EEFC80.2010504>