Indexing Mail faster

[Kevin Laurie]

Dear Peter,

My inbox is MDA_external
Storage: 17GB of 24GB

Subject / From / To  is fast but FTS(Full Text Search) for body is
horrible. I suppose this is where we need Apache Solr.

Do you think my mail storage format is bad? Do I need to change for better
performance?
Please advise
Kevin



On Thu, Jan 29, 2015 at 12:25 PM, Peter Hodur <petehodur at gmail.com> wrote:

> > * Kevin Laurie <superinterstellar at gmail.com> 2015.01.24 19:41:
> >
> > > Currently the time it takes to search 25,000mails is 4mins. If indexed
> > how
> > > much faster are we looking at?
> >
> > With a current version of Dovecot a search is pretty fast _without_ using
> > external indexes. I have a view defined (virtual plugin) with around
> 22.000
> > messages in it, and searching the full view only takes 2.5 seconds:
> >
> >
> hmmm, could you please tell me more about your setup? What storage format
> do you use? Maildir or? What is the cumulative size of your messages?
>
> My results without FTS on ZFS FS with SSD L2ARC are not so good:
>
> a4 select INBOX._OLD-OUTLOOK
> * FLAGS (\Answered \Flagged \Deleted \Seen \Draft $Junk $NotJunk
> JunkRecorded $Forwarded)
> * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft $Junk
> $NotJunk JunkRecorded $Forwarded \*)] Flags permitted.
> ** 7748 EXISTS*
> * 0 RECENT
> * OK [UIDVALIDITY 1421198037] UIDs valid
> * OK [UIDNEXT 11509] Predicted next UID
> * OK [HIGHESTMODSEQ 12204] Highest
> a4 OK [READ-WRITE] Select completed (0.001 secs).
>
> a5 search charset utf-8 body "mall"
> * SEARCH 2 49 101 117 158 171 185 192 197 202 207 223 228 234 236 240 249
> 279 280 281 287 288 289 290 297 321 327 337 344 351 360 370 373 385 389 390
> 391 398 405 413 424 444 458 463 470 474 480 482 505 513 520 530 531 532 533
> 543 559 560 561 562 563 566 588 593 597 625 630 639 644 656 671 672 677 692
> 720 723 734 738 741 745 752 755 757 765 775 777 784 791 818 820 821 833 855
> 863 864 868 881 896 910 917 922 926 928 931 991 996 997 998 1000 1010 1011
> 1012 1014 1018 1019 1026 1047 1068 1077 1095 1101 1105 1122 1136 1137 1140
> 1155 1160 1166 1171 1179 1180 1197 1208 1229 1239 1258 1263 1271 1282 1286
> 1290 1298 1319 1364 1365 1370 1386 1408 1410 1429 1463 1465 1470 1471 1494
> 1518 1522 1529 1530 1536 1541 1548 1571 1581 1585 1588 1594 1605 1606 1611
> 1612 1619 1620 1625 1652 1666 1667 1729 1730 1731 1732 1733 1734 1735 1781
> 1782 1817 1818 1897 1900 1921 1940 1946 1960 1972 1981 1995 1998 2002 2006
> 2028 2049 2057 2095 2100 2157 2168 2181 2185 2192 2203 2204 2207 2208 2210
> 2220 2225 2255 2273 2282 2283 2288 2289 2317 2320 2340 2367 2374 2377 2378
> 2379 2384 2389 2402 2409 2436 2459 2475 2476 2488 2504 2519 2538 2539 2551
> 2566 2572 2597 2599 2603 2617 2629 2664 2698 2716 2731 2733 2753 2754 2780
> 2805 2808 2815 2818 2850 2861 2862 2867 2886 2896 2900 2914 2931 2936 2938
> 2939 2950 2969 2990 3017 3019 3062 3075 3094 3101 3115 3138 3159 3161 3178
> 3185 3190 3204 3217 3218 3248 3263 3265 3266 3273 3282 3288 3295 3386 3428
> 3453 3476 3478 3479 3511 3548 3606 3629 3693 3694 3737 3793 3799 3801 3808
> 3812 3814 3815 3834 3849 3860 3862 3880 3910 3917 3930 3932 3952 3953 3954
> 3957 3959 3968 3971 3973 3978 3979 3980 4008 4022 4040 4057 4058 4059 4063
> 4064 4066 4069 4070 4075 4096 4112 4131 4132 4133 4141 4143 4144 4145 4146
> 4147 4167 4174 4199 4201 4202 4203 4206 4211 4217 4218 4226 4229 4258 4259
> 4267 4287 4357 4359 4363 4364 4365 4367 4390 4391 4462 4475 4497 4502 4538
> 4540 4552 4557 4558 4561 4563 4567 4571 4572 4573 4575 4577 4593 4594 4604
> 4611 4619 4628 4638 4639 4662 4672 4678 4679 4692 4696 4785 4786 4787 4788
> 4789 4792 4793 4794 4802 4817 4818 4819 4820 4836 4857 4874 4887 4901 4905
> 4906 4907 4908 4911 4925 4928 4940 4941 4953 5060 5103 5116 5118 5129 5131
> 5136 5158 5163 5182 5184 5203 5212 5216 5269 5270 5271 5272 5273 5276 5277
> 5278 5286 5301 5302 5303 5304 5320 5341 5358 5371 5385 5389 5390 5391 5392
> 5395 5409 5412 5424 5425 5437 5544 5587 5600 5602 5613 5615 5620 5642 5647
> 5666 5668 5687 5696 5700 5736 5740 5749 5764 5783 5809 5814 5853 5866 5867
> 5877 5888 5895 5896 5897 5898 5899 5908 5910 5911 5912 5939 5950 5958 5990
> 6000 6059 6074 6095 6097 6112 6137 6141 6189 6193 6212 6228 6229 6233 6271
> 6273 6275 6285 6310 6317 6335 6383 6384 6397 6427 6430 6459 6463 6482 6492
> 6506 6565 6585 6620 6670 6673 6675 6705 6715 6716 6741 6812 6826 6852 6859
> 6895 6896 6907 6913 6919 6935 6943 6948 6979 7023 7025 7035 7039 7042 7108
> 7131 7145 7163 7171 7172 7194 7198 7199 7203 7256 7257 7294 7303 7317 7322
> 7343 7344 7347 7348 7352 7386 7390 7391 7392 7393 7407 7408 7409 7417 7418
> 7419 7420 7421 7426 7432 7437 7462 7467 7468 7473 7474 7475 7488 7502 7503
> 7558 7588 7589 7628 7685 7695 7699 7703 7723
> *a5 OK Search completed (7.846 secs).*
>
>
> Searching against "subject" is pretty fast, few miliseconds ...
>