MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 02/03/01 through 02/09/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,995 2,606,307
MED90 10,686 184,850
MED85 8,247 77,362
MED80 7,363 36,407
MED75 6,972 26,824
MED66 7,077 31,213
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,420 24,560
2-4 a.m. 913 13,559
4-6 a.m. 421 14,335
6-8 a.m. 1,458 42,178
8-10 a.m. 6,549 260,588
10-12 a.m. 15,473 515,657
12-2 p.m. 15,417 478,637
2-4 p.m. 20,191 642,138
4-6 p.m. 14,645 501,641
6-8 p.m. 7,018 242,618
8-10 p.m. 4,775 142,720
10-12 p.m. 3,060 84,332
__________ _____________ _________________
Total: 91,340 2,962,963
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 193
Davis 475
Irvine 140
Los Angeles 427
Riverside 33
San Diego 694
San Francisco 1,162
Santa Barbara 3
Santa Cruz 2
Lawrence Berkeley 113
Lawrence Livermore 102
Los Alamos 0
MELWEB 73,099
Searchlight 14,228
Other - UC 15
Other-Network UC 654
_____
91,340
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 972
Davis 6,393
Irvine 1,997
Los Angeles 4,716
Riverside 197
San Diego 5,655
San Francisco 11,223
Santa Barbara 11
Santa Cruz 4
Lawrence Berkeley 202
Lawrence Livermore 1,575
Los Alamos 0
MELWEB 2,922,863
Searchlight 0
Other - UC 32
Other-Network UC 7,123
_____
2,962,963
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 3.0
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) 21:02
Average session length (minutes:seconds) 18:02
Longest session recorded (minutes:seconds) 244:08
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 449.2
Retrievals per search - standard deviation 5927.9
Percent of searches completed with 0 results 35.5%
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 91,340 14.1%
PRESENT 511,904 79.3%
INIT or CLOSE 41,265 6.4%
OTHER 1,283 0.2%
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 5,953 4.7% 2,350 39.5% 4 798.0 4035.2
PERSONAL AUTHOR 24,824 19.4% 7,362 29.7% 7 82.7 1716.0
TITLE WORD 10,423 8.1% 4,107 39.4% 3 199.2 1818.5
SUBSET 272 0.2% 57 21.0% 31 211.6 925.9
SUBJECT WORD 146 0.1% 81 55.5% 9 884.2 4869.0
SUBJECT 2,237 1.7% 1,261 56.4% 19 762.3 3510.1
EXACT SUBJECT 5,215 4.1% 1,339 25.7% 36 564.4 2969.4
MAJOR SUBJECT 196 0.2% 84 42.9% 13 95.1 293.2
EXACT MAJOR SUBJ 464 0.4% 107 23.1% 45 282.9 770.5
EXACT TITLE 681 0.5% 431 63.3% 1 10.0 45.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,379 1.1% 390 28.3% 376 1652.8 3264.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 2 0.0% 1 50.0% 123 123.0 0.0
KEYWORD 55,673 43.5% 20,590 37.0% 18 934.4 9362.0
DATE 2,111 1.6% 643 30.5% 8 272.7 5695.9
LANGUAGE 7,053 5.5% 1,806 25.6% 26 414.2 2617.0
UNIQUE ID 353 0.3% 103 29.2% 1 1.0 0.2
ADDED 1,102 0.9% 1,102 100% 0 0.0 0.0
PUB TYPE 3,191 2.5% 651 20.4% 25 184.3 892.3
AUTHOR AFFIL. 691 0.5% 312 45.1% 8 556.5 7123.0
CHEMICAL NAME 9 0.0% 2 22.2% 11 20.4 18.1
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 5,370 4.2% 1,696 31.6% 19 515.2 2245.1
AGE 204 0.2% 52 25.5% 24 390.3 1714.8
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 169 0.1% 55 32.5% 36 2156.2 10023.2
XXS 164 0.1% 99 60.4% 14 236.9 978.5
XMXS 86 0.1% 39 45.3% 17 526.6 2406.5
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 35 0.0% 32 91.4% 12 468.0 799.4
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 24,238 26.5% 8,570 35.4% 8 297.7 2815.9
Single 67,102 73.5% 23,862 35.6% 16 841.0 8428.7
PRESENT commands, by type:
MARC 30.6%
OPAC 29.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS