MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/01/01 through 05/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 231,084 11,897,275
MED90 48,717 739,252
MED85 38,062 293,270
MED80 34,283 160,827
MED75 32,333 103,993
MED66 32,909 107,378
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 9,409 276,500
2-4 a.m. 5,164 182,632
4-6 a.m. 1,613 97,137
6-8 a.m. 5,867 224,999
8-10 a.m. 30,023 962,170
10-12 a.m. 66,435 2,157,223
12-2 p.m. 71,148 2,243,099
2-4 p.m. 82,898 2,519,813
4-6 p.m. 65,173 2,092,599
6-8 p.m. 36,983 1,177,173
8-10 p.m. 24,476 790,618
10-12 p.m. 18,199 578,032
__________ _____________ _________________
Total: 417,388 13,301,995
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,894
Davis 3,225
Irvine 976
Los Angeles 3,132
Riverside 513
San Diego 2,492
San Francisco 4,891
Santa Barbara 210
Santa Cruz 269
Lawrence Berkeley 475
Lawrence Livermore 112
Los Alamos 33
MELWEB 328,157
Searchlight 67,880
Other - UC 345
Other-Network UC 2,784
_____
417,388
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 15,931
Davis 36,674
Irvine 11,182
Los Angeles 38,972
Riverside 2,991
San Diego 27,997
San Francisco 51,536
Santa Barbara 1,251
Santa Cruz 1,420
Lawrence Berkeley 4,936
Lawrence Livermore 2,322
Los Alamos 483
MELWEB 12,780,462
Searchlight 284,058
Other - UC 4,871
Other-Network UC 36,909
_____
13,301,995
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:52
Average session length (minutes:seconds) 17:22
Longest session recorded (minutes:seconds) 297:58
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 403.7
Retrievals per search - standard deviation 4776.4
Percent of searches completed with 0 results 35.3%
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 417,388 13.9%
PRESENT 2,383,634 79.6%
INIT or CLOSE 189,469 6.3%
OTHER 2,625 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 24,030 4.2% 9,948 41.4% 4 995.3 5272.1
PERSONAL AUTHOR 112408 19.5% 32,825 29.2% 7 93.1 1165.4
TITLE WORD 46,636 8.1% 18,409 39.5% 3 199.4 2445.5
SUBSET 882 0.2% 253 28.7% 26 341.3 1818.6
SUBJECT WORD 1,094 0.2% 569 52.0% 10 2361.5 21395.3
SUBJECT 11,685 2.0% 6,163 52.7% 17 867.5 8336.6
EXACT SUBJECT 21,675 3.8% 5,188 23.9% 33 618.3 4001.2
MAJOR SUBJECT 1,031 0.2% 544 52.8% 18 511.1 2140.1
EXACT MAJOR SUBJ 2,443 0.4% 516 21.1% 25 349.8 2158.3
EXACT TITLE 3,492 0.6% 1,973 56.5% 1 146.7 1981.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,075 0.9% 1,417 27.9% 457 2087.8 4503.9
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 83 0.0% 34 41.0% 67 480.7 1225.3
KEYWORD 258012 44.9% 95,426 37.0% 16 773.0 7036.3
DATE 8,607 1.5% 2,286 26.6% 7 104.3 620.4
LANGUAGE 29,497 5.1% 8,157 27.7% 26 447.3 2821.2
UNIQUE ID 854 0.1% 288 33.7% 1 1.0 0.2
ADDED 5,065 0.9% 2,820 55.7% 6 24.5 74.1
PUB TYPE 13,300 2.3% 3,313 24.9% 22 195.7 854.8
AUTHOR AFFIL. 3,185 0.6% 1,495 46.9% 8 94.6 835.4
CHEMICAL NAME 89 0.0% 72 80.9% 29 175.0 439.6
EXACT CHEMICAL 15 0.0% 10 66.7% 122 672.6 1109.0
AT 22,354 3.9% 6,917 30.9% 22 573.1 3304.7
AGE 1,246 0.2% 281 22.6% 26 781.9 4887.3
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 922 0.2% 357 38.7% 25 884.1 8280.1
XXS 871 0.2% 372 42.7% 14 444.4 4837.9
XMXS 379 0.1% 160 42.2% 14 456.9 4575.2
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 210 0.0% 166 79.0% 17 634.1 1463.4
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 108,208 25.9% 37,319 34.5% 8 299.4 2701.2
Single 309,180 74.1% 109834 35.5% 15 738.7 6703.4
PRESENT commands, by type:
MARC 29.0%
OPAC 31.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS