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POParsing SHOW ENGINE INNODB STATUS in ruby with regex
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copied!<p>I'm trying to parse the output of SHOW ENGINE INNODB STATUS in ruby and break each section of the output into a hash. The input looks something like this:</p> <pre><code>===================================== 111122 21:44:14 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 7 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 343485 1_second, 343478 sleeps, 34330 10_second, 180 background, 180 flush srv_master_thread log flush and writes: 347405 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 35569, signal count 35549 Mutex spin waits 568, rounds 16942, OS waits 122 RW-shared spins 34379, rounds 1031182, OS waits 33574 RW-excl spins 14, rounds 56280, OS waits 1870 Spin rounds per wait: 29.83 mutex, 29.99 RW-shared, 4020.00 RW-excl -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] , ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0 Pending flushes (fsync) log: 0; buffer pool: 0 174398 OS file reads, 1293893 OS file writes, 476099 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 1.00 writes/s, 1.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 5, seg size 7, 413 merges merged operations: insert 619, delete mark 1172, delete 685 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 553193, node heap has 5 buffer(s) 1.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 18246430610 Log flushed up to 18246430610 Last checkpoint at 18246428493 Max checkpoint age 7782360 Checkpoint age target 7539162 Modified age 2117 Checkpoint age 2117 0 pending log writes, 0 pending chkp writes 395104 log i/o's done, 1.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 136216576; in additional pool allocated 0 Internal hash tables (constant factor + variable factor) Adaptive hash index 2298852 (2212772 + 86080) Page hash 69556 (buffer pool 0 only) Dictionary cache 1316974 (553912 + 763062) File system 58436 (41336 + 17100) Lock system 167716 (166436 + 1280) Recovery system 0 (0 + 0) Dictionary memory allocated 763062 Buffer pool size 8191 Buffer pool size, bytes 134201344 Free buffers 0 Database pages 8186 Old database pages 3001 Modified db pages 18 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 166320, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 174314, created 16854, written 855084 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 8186, unzip_LRU len: 0 I/O sum[110]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 1 read views open inside InnoDB ---OLDEST VIEW--- Normal read view Read view low limit trx n:o 3FB94D3 Read view up limit trx id 3FB94D3 Read view low limit trx id 3FB94D3 Read view individually stored trx ids: ----------------- Main thread process no. 12245, id 2777058192, state: flushing log Number of rows inserted 439964, updated 362023, deleted 794, read 4706858 0.00 inserts/s, 1.00 updates/s, 0.00 deletes/s, 1.00 reads/s ------------ TRANSACTIONS ------------ Trx id counter 3FB94D3 Purge done for trx's n:o < 3FB94D3 undo n:o < 0 History list length 3221 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 72085, OS thread handle 0xa4435b90, query id 1594101 anders.borg.lan 192.168.1.12 aaron show engine innodb status ---TRANSACTION 0, not started MySQL thread id 69032, OS thread handle 0xa833bb90, query id 1539435 anders.borg.lan 192.168.1.12 aaron ---TRANSACTION 3FB8DA3, not started MySQL thread id 58893, OS thread handle 0xa839db90, query id 1590306 localhost pd ---TRANSACTION 3FB94D1, not started MySQL thread id 2, OS thread handle 0xa85a8b90, query id 1594100 Slave has read all relay log; waiting for the slave I/O thread to update it ---------------------------- END OF INNODB MONITOR OUTPUT ============================ </code></pre> <p>I want to get the headers BACKGROUND THREAD, SEMAPHORES, FILE I/O, as a key in a hash with the data below them as the value. I'm attempting to use regular expressions rather than a complex looping structure, but I'm open to elegant Enumerable options as well.</p> <p>This extracts the keys:</p> <pre><code>ruby-1.9.2-p290 :011 > pp foo.scan /-{4,}\n([[:upper:][:space:][:punct:]]+)\n-{4,}\n/ [["BACKGROUND THREAD"], ["SEMAPHORES"], ["FILE I/O"], ["INSERT BUFFER AND ADAPTIVE HASH INDEX"], ["BUFFER POOL AND MEMORY"], ["ROW OPERATIONS"], ["LATEST DETECTED DEADLOCK"], ["TRANSACTIONS"]] </code></pre> <p>but when I attempt to get the value piece out, I'm unsuccessful. What I have tried (unsuccessfully) is</p> <pre><code>foo.scan /-{4,}\n([[:upper:][:space:][:punct:]]+)\n-{4,}\n(.*?)/m => [["BACKGROUND THREAD", ""], ["SEMAPHORES", ""], ["FILE I/O", ""], ["INSERT BUFFER AND ADAPTIVE HASH INDEX", ""], ["BUFFER POOL AND MEMORY", ""], ["ROW OPERATIONS", ""], ["TRANSACTIONS", ""]] </code></pre> <p>This still just gets the headers with blank values (I have tried with and without /m). When I make the second group greedy, it all goes to heck:</p> <pre><code>> pp foo.scan /-{4,}\n([[:upper:][:space:][:punct:]]+)\n-{4,}\n(.*)/m [["BACKGROUND THREAD", "srv_master_thread loops: 331475 1_second, 331470 sleeps, 33130 10_second, 171 background, 171 flush\nsrv_master_thread log flush and writes: 335234\n----------\nSEMAPHORES\n----------\nOS WAIT ARRAY INFO: reservation count 34304, signal count 34284\nMutex spin waits 525, rounds 15652, OS waits 111\nRW-shared spins 33171, rounds 994896, OS waits 32391\nRW-excl spins 14, rounds 54150, OS waits 1799\nSpin rounds per wait: 29.81 mutex, 29.99 RW-shared, 3867.86 RW-excl\n--------\nFILE I/O\n--------\nI/O thread 0 state: waiting for completed aio requests (insert buffer thread)\nI/O thread 1 state: waiting for completed aio requests (log thread)\nI/O thread 2 state: waiting for completed aio requests (read thread)\nI/O thread 3 state: waiting for completed aio requests (read thread)\nI/O thread 4 state: waiting for completed aio requests (read thread)\nI/O thread 5 state: waiting for completed aio requests (read thread)\nI/O thread 6 state: waiting for completed aio requests (write thread)\nI/O thread 7 state: waiting for completed aio requests (write thread)\nI/O thread 8 state: waiting for completed aio requests (write thread)\nI/O thread 9 state: waiting for completed aio requests (write thread)\nPending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] ,\n ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0\nPending flushes (fsync) log: 0; buffer pool: 0\n172201 OS file reads, 1243697 OS file writes, 457553 OS fsyncs\n0.00 reads/s, 0 avg bytes/read, 3.70 writes/s, 1.30 fsyncs/s\n-------------------------------------\nINSERT BUFFER AND ADAPTIVE HASH INDEX\n-------------------------------------\nIbuf: size 1, free list len 5, seg size 7, 399 merges\nmerged operations:\n insert 605, delete mark 1172, delete 685\ndiscarded operations:\n insert 0, delete mark 0, delete 0\nHash table size 553193, node heap has 4 buffer(s)\n1.00 hash searches/s, 0.00 non-hash searches/s\n---\nLOG\n---\nLog sequence number 18200393778\nLog flushed up to 18200393778\nLast checkpoint at 18200391595\nMax checkpoint age 7782360\nCheckpoint age target 7539162\nModified age 2183\nCheckpoint age 2183\n0 pending log writes, 0 pending chkp writes\n380952 log i/o's done, 1.10 log i/o's/second\n----------------------\nBUFFER POOL AND MEMORY\n----------------------\nTotal memory allocated 136216576; in additional pool allocated 0\nInternal hash tables (constant factor + variable factor)\n Adaptive hash index 2282468 \t(2212772 + 69696)\n Page hash 69556 (buffer pool 0 only)\n Dictionary cache 1316974 \t(553912 + 763062)\n File system 58436 \t(41336 + 17100)\n Lock system 167716 \t(166436 + 1280)\n Recovery system 0 \t(0 + 0)\nDictionary memory allocated 763062\nBuffer pool size 8191\nBuffer pool size, bytes 134201344\nFree buffers 0\nDatabase pages 8187\nOld database pages 3002\nModified db pages 18\nPending reads 0\nPending writes: LRU 0, flush list 0, single page 0\nPages made young 164135, not young 0\n0.00 youngs/s, 0.00 non-youngs/s\nPages read 172117, created 14087, written 822028\n0.00 reads/s, 0.00 creates/s, 2.50 writes/s\nBuffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000\nPages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s\nLRU len: 8187, unzip_LRU len: 0\nI/O sum[116]:cur[0], unzip sum[0]:cur[0]\n--------------\nROW OPERATIONS\n--------------\n0 queries inside InnoDB, 0 queries in queue\n1 read views open inside InnoDB\n---OLDEST VIEW---\nNormal read view\nRead view low limit trx n:o 3FB30F3\nRead view up limit trx id 3FB30F3\nRead view low limit trx id 3FB30F3\nRead view individually stored trx ids:\n-----------------\nMain thread process no. 12245, id 2777058192, state: sleeping\nNumber of rows inserted 332424, updated 349391, deleted 794, read 4555996\n0.00 inserts/s, 1.00 updates/s, 0.00 deletes/s, 1.00 reads/s\n------------\nTRANSACTIONS\n------------\nTrx id counter 3FB30F5\nPurge done for trx's n:o < 3FB30F3 undo n:o < 0\nHistory list length 3503\nLIST OF TRANSACTIONS FOR EACH SESSION:\n---TRANSACTION 0, not started\nMySQL thread id 69032, OS thread handle 0xa833bb90, query id 1539435 anders.borg.lan 192.168.1.12 aaron\nSHOW ENGINE INNODB STATUS\n---TRANSACTION 0, not started\nMySQL thread id 69030, OS thread handle 0xa4435b90, query id 1527567 anders.borg.lan 192.168.1.12 aaron\n---TRANSACTION 3FB23A6, not started\nMySQL thread id 58893, OS thread handle 0xa839db90, query id 1531687 localhost pd\n---TRANSACTION 3FB30F3, not started\nMySQL thread id 2, OS thread handle 0xa85a8b90, query id 1539435 Slave has read all relay log; waiting for the slave I/O thread to update it\n----------------------------\nEND OF INNODB MONITOR OUTPUT\n============================\n"]] </code></pre> <p>The keyboard shaped indent in my forehead is starting to chafe, so if anyone has thoughts, I would really appreciate it.</p> <p>Thanks!</p> <p><strong>EDIT</strong> I'm almost there with the following regex, but it misses the final group in the output, TRANSACTIONS. I need to make the final non-capturing group optional, but adding ? after the final ) doesn't seem to do it:</p> <pre><code>> pp str.scan /-{4,}\n([[:upper:][:space:][:punct:]]+)\n-{4,}\n(.*?)(?=\n-{4,}\n[[:upper:][:space:][:punct:]]+\n-{4,})/m [["BACKGROUND THREAD", "srv_master_thread loops: 26645693 1_second, 26645613 sleeps, 266456 10_second, 455 background, 455 flush\nsrv_master_thread log flush and writes: 2937913"], ["SEMAPHORES", "OS WAIT ARRAY INFO: reservation count 15790436, signal count 18650446\nMutex spin waits 6231859458, rounds 9218278203, OS waits 7750045\nRW-shared spins 7207433, OS waits 656673; RW-excl spins 97132, OS waits 408931\nSpin rounds per wait: 1.48 mutex, 10.35 RW-shared, 177.41 RW-excl"], ["FILE I/O", "I/O thread 0 state: waiting for i/o request (insert buffer thread)\nI/O thread 1 state: waiting for i/o request (log thread)\nI/O thread 2 state: waiting for i/o request (read thread)\nI/O thread 3 state: waiting for i/o request (read thread)\nI/O thread 4 state: waiting for i/o request (read thread)\nI/O thread 5 state: waiting for i/o request (read thread)\nI/O thread 6 state: waiting for i/o request (write thread)\nI/O thread 7 state: waiting for i/o request (write thread)\nI/O thread 8 state: waiting for i/o request (write thread)\nI/O thread 9 state: waiting for i/o request (write thread)\nPending normal aio reads: 0, aio writes: 0,\n ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0\nPending flushes (fsync) log: 0; buffer pool: 0\n8702304 OS file reads, 249839013 OS file writes, 147614062 OS fsyncs\n0.59 reads/s, 16384 avg bytes/read, 62.21 writes/s, 31.38 fsyncs/s"], ["INSERT BUFFER AND ADAPTIVE HASH INDEX", "Ibuf: size 1, free list len 1922, seg size 1924,\n725992 inserts, 725992 merged recs, 546813 merges\nHash table size 283212071, node heap has 1 buffer(s)\n0.00 hash searches/s, 30503.28 non-hash searches/s\n---\nLOG\n---\nLog sequence number 2723462238497\nLog flushed up to 2723462238497\nLast checkpoint at 2723462084076\nMax checkpoint age 3396675134\nCheckpoint age target 3290529037\nModified age 154421\nCheckpoint age 154421\n0 pending log writes, 0 pending chkp writes\n131000087 log i/o's done, 25.67 log i/o's/second"], ["BUFFER POOL AND MEMORY", "Total memory allocated 140995723264; in additional pool allocated 0\nInternal hash tables (constant factor + variable factor)\n Adaptive hash index 2265717168 \t(2265696568 + 20600)\n Page hash 141606856\n Dictionary cache 569091839 \t(566425616 + 2666223)\n File system 195856 \t(82672 + 113184)\n Lock system 340161088 \t(339997048 + 164040)\n Recovery system 0 \t(0 + 0)\n Threads 449944 \t(406936 + 43008)\nDictionary memory allocated 2666223\nBuffer pool size 8388607\nBuffer pool size, bytes 137438937088\nFree buffers 1\nDatabase pages 8388605\nOld database pages 3096554\nModified db pages 594\nPending reads 0\nPending writes: LRU 0, flush list 0, single page 0\nPages made young 4784976, not young 0\n0.30 youngs/s, 0.00 non-youngs/s\nPages read 12326482, created 1997429, written 137433410\n0.59 reads/s, 0.14 creates/s, 41.24 writes/s\nBuffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000\nPages read ahead 0.00/s, evicted without access 0.00/s\nLRU len: 8388605, unzip_LRU len: 0\nI/O sum[1914]:cur[0], unzip sum[0]:cur[0]"], ["ROW OPERATIONS", "0 queries inside InnoDB, 0 queries in queue\n11 read views open inside InnoDB\nMain thread process no. 28529, id 140437935073024, state: sleeping\nNumber of rows inserted 217582489, updated 81459757, deleted 20128876, read 500031405066\n8.59 inserts/s, 19.70 updates/s, 1.24 deletes/s, 86631.36 reads/s"], ["LATEST DETECTED DEADLOCK", "111111 18:45:12\n*** (1) TRANSACTION:\nTRANSACTION 88D7813CC, ACTIVE 0 sec, process no 28529, OS thread id 140437815531264 starting index read\nmysql tables in use 1, locked 1\nLOCK WAIT 3 lock struct(s), heap size 1248, 2 row lock(s), undo log entries 1\nMySQL thread id 9633269, query id 3915648018 10.124.62.113 ideeli Updating\nUPDATE `skus` SET `updated_at` = '2011-11-11 18:45:12', `position` = 4 WHERE `id` = 6481750\n*** (1) WAITING FOR THIS LOCK TO BE GRANTED:\nRECORD LOCKS space id 26132 page no 23995 n bits 144 index `PRIMARY` of table `ideeli_production`.`skus` trx id 88D7813CC lock_mode X locks rec but not gap waiting\n*** (2) TRANSACTION:\nTRANSACTION 88D78109E, ACTIVE 2 sec, process no 28529, OS thread id 140437787576064 starting index read\nmysql tables in use 1, locked 1\n3 lock struct(s), heap size 1248, 3 row lock(s), undo log entries 2\nMySQL thread id 9628857, query id 3915648065 10.124.62.114 ideeli Updating\nUPDATE `skus` SET `updated_at` = '2011-11-11 18:45:12', `position` = 5 WHERE `id` = 6481786\n*** (2) HOLDS THE LOCK(S):\nRECORD LOCKS space id 26132 page no 23995 n bits 176 index `PRIMARY` of table `ideeli_production`.`skus` trx id 88D78109E lock_mode X locks rec but not gap\n*** (2) WAITING FOR THIS LOCK TO BE GRANTED:\nRECORD LOCKS space id 26132 page no 23995 n bits 144 index `PRIMARY` of table `ideeli_production`.`skus` trx id 88D78109E lock_mode X locks rec but not gap waiting\n*** WE ROLL BACK TRANSACTION (1)"]] </code></pre> <p><strong>EDIT 2</strong> - I found the right expression. Also, I answered my question below:</p> <pre><code>Hash[status.scan /-+\n([[:upper:][:space:][:punct:]]+)\n-+\n(.*?)(?=\n-+\n[[:upper:][:space:][:punct:]]+\n)/m] </code></pre>

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