MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/01/00 through 11/30/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 201,989 10,499,270
MED90 43,573 732,252
MED85 33,584 278,755
MED80 30,223 128,738
MED75 28,703 95,905
MED66 28,988 110,455
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 9,549 219,218
2-4 a.m. 2,045 40,071
4-6 a.m. 1,235 40,113
6-8 a.m. 5,055 159,910
8-10 a.m. 26,272 895,899
10-12 a.m. 59,466 2,006,487
12-2 p.m. 64,714 2,029,610
2-4 p.m. 75,559 2,397,322
4-6 p.m. 58,571 1,959,917
6-8 p.m. 30,352 978,366
8-10 p.m. 21,729 680,576
10-12 p.m. 12,513 437,886
__________ _____________ _________________
Total: 367,060 11,845,375
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 949
Davis 3,508
Irvine 361
Los Angeles 2,761
Riverside 295
San Diego 2,617
San Francisco 4,873
Santa Barbara 99
Santa Cruz 50
Lawrence Berkeley 125
Lawrence Livermore 51
Los Alamos 0
MELWEB 282,018
Searchlight 66,290
Other - UC 632
Other-Network UC 2,431
_____
367,060
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 13,312
Davis 29,943
Irvine 4,229
Los Angeles 28,053
Riverside 1,718
San Diego 25,697
San Francisco 52,441
Santa Barbara 385
Santa Cruz 990
Lawrence Berkeley 1,140
Lawrence Livermore 810
Los Alamos 0
MELWEB 11,608,662
Searchlight 53,179
Other - UC 4,879
Other-Network UC 19,937
_____
11,845,375
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 3.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:44
Average session length (minutes:seconds) 16:50
Longest session recorded (minutes:seconds) 259:19
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 440.7
Retrievals per search - standard deviation 5721.5
Percent of searches completed with 0 results 35.7%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 367,060 14.1%
PRESENT 2,055,198 79.1%
INIT or CLOSE 172,430 6.6%
OTHER 1,911 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 21,965 4.2% 9,455 43.0% 5 952.1 6759.7
PERSONAL AUTHOR 94,434 18.2% 27,573 29.2% 7 84.5 1544.0
TITLE WORD 37,445 7.2% 14,513 38.8% 3 205.6 2580.9
SUBSET 944 0.2% 270 28.6% 29 602.3 3756.3
SUBJECT WORD 623 0.1% 290 46.5% 11 1844.8 14438.7
SUBJECT 11,073 2.1% 5,823 52.6% 19 662.2 5050.8
EXACT SUBJECT 22,270 4.3% 5,774 25.9% 34 682.5 7726.3
MAJOR SUBJECT 986 0.2% 480 48.7% 17 462.1 2007.8
EXACT MAJOR SUBJ 2,445 0.5% 577 23.6% 24 491.3 3747.2
EXACT TITLE 3,583 0.7% 2,298 64.1% 1 38.1 358.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,048 1.0% 1,614 32.0% 449 1747.9 3696.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 56 0.0% 28 50.0% 14 35.8 55.1
KEYWORD 230281 44.3% 86,017 37.4% 17 875.2 8398.3
DATE 8,208 1.6% 1,928 23.5% 6 129.7 1122.4
LANGUAGE 29,909 5.8% 8,760 29.3% 27 426.7 2984.9
UNIQUE ID 1,710 0.3% 444 26.0% 1 1.0 0.4
ADDED 4,897 0.9% 4,118 84.1% 3 11.6 25.2
PUB TYPE 12,922 2.5% 3,287 25.4% 24 232.7 2901.6
AUTHOR AFFIL. 3,070 0.6% 1,439 46.9% 8 95.2 648.6
CHEMICAL NAME 43 0.0% 25 58.1% 5 89.7 175.6
EXACT CHEMICAL 13 0.0% 11 84.6% 7 6.5 7.8
AT 24,435 4.7% 8,238 33.7% 24 641.6 4115.5
AGE 1,252 0.2% 332 26.5% 17 118.2 359.8
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 773 0.1% 212 27.4% 38 509.8 3024.7
XXS 808 0.2% 414 51.2% 19 1035.9 11813.5
XMXS 364 0.1% 179 49.2% 28 277.5 1128.1
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 66 0.0% 52 78.8% 10 29.4 33.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 99,472 27.1% 36,121 36.3% 9 326.6 3397.3
Single 267,588 72.9% 95,025 35.5% 16 817.5 8068.6
PRESENT commands, by type:
MARC 30.1%
OPAC 29.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS