MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 02/01/00 through 02/29/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 198,607 10,474,042
MED90 44,234 809,852
MED85 32,103 310,298
MED80 28,064 161,235
MED75 25,842 108,106
MED66 26,511 141,423
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,069 213,521
2-4 a.m. 3,603 94,825
4-6 a.m. 812 37,176
6-8 a.m. 5,033 157,960
8-10 a.m. 26,131 851,272
10-12 a.m. 56,414 1,946,814
12-2 p.m. 61,115 2,084,546
2-4 p.m. 74,667 2,417,998
4-6 p.m. 56,268 1,936,680
6-8 p.m. 29,791 1,066,958
8-10 p.m. 21,184 739,759
10-12 p.m. 13,274 457,447
__________ _____________ _________________
Total: 355,361 12,004,956
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 2,126
Davis 2,649
Irvine 380
Los Angeles 3,185
Riverside 237
San Diego 4,360
San Francisco 4,500
Santa Barbara 187
Santa Cruz 235
Lawrence Berkeley 252
Lawrence Livermore 79
Los Alamos 0
MELWEB 328,790
Searchlight 5,082
Other - UC 646
Other-Network UC 2,653
_____
355,361
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 27,592
Davis 46,956
Irvine 11,348
Los Angeles 39,731
Riverside 2,430
San Diego 30,225
San Francisco 49,840
Santa Barbara 903
Santa Cruz 2,995
Lawrence Berkeley 1,312
Lawrence Livermore 1,486
Los Alamos 0
MELWEB 11,688,134
Searchlight 47,738
Other - UC 25,359
Other-Network UC 28,907
_____
12,004,956
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.3
Standard deviation in seconds 4.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 0.9
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:04
Average session length (minutes:seconds) 18:01
Longest session recorded (minutes:seconds) 262:43
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 382.4
Retrievals per search - standard deviation 4332.0
Percent of searches completed with 0 results 32.9%
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 355,361 13.2%
PRESENT 2,176,516 81.1%
INIT or CLOSE 151,792 5.7%
OTHER 1,517 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 21,618 4.2% 8,517 39.4% 4 684.9 3893.0
PERSONAL AUTHOR 98,881 19.1% 26,758 27.1% 7 87.0 2175.2
TITLE WORD 34,872 6.7% 13,135 37.7% 3 170.4 2609.6
SUBSET 932 0.2% 210 22.5% 26 300.3 1532.5
SUBJECT WORD 1,894 0.4% 963 50.8% 17 1570.1 16132.0
SUBJECT 11,367 2.2% 6,160 54.2% 22 867.6 6388.9
EXACT SUBJECT 25,096 4.8% 6,848 27.3% 29 488.3 3289.8
MAJOR SUBJECT 1,088 0.2% 451 41.4% 18 252.2 1142.3
EXACT MAJOR SUBJ 2,467 0.5% 444 18.0% 19 282.0 1216.7
EXACT TITLE 3,800 0.7% 2,132 56.1% 1 16.8 302.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 5,106 1.0% 1,770 34.7% 247 1290.5 2683.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 174 0.0% 78 44.8% 36 395.6 775.3
KEYWORD 215030 41.5% 73,025 34.0% 19 745.6 6430.7
DATE 9,135 1.8% 2,087 22.8% 4 134.5 2888.5
LANGUAGE 33,017 6.4% 9,798 29.7% 27 482.9 3078.5
UNIQUE ID 1,720 0.3% 627 36.5% 1 4.4 112.1
ADDED 3,973 0.8% 2,417 60.8% 7 20.6 48.3
PUB TYPE 12,351 2.4% 3,042 24.6% 22 174.8 1340.8
AUTHOR AFFIL. 3,570 0.7% 1,572 44.0% 9 92.4 2267.6
CHEMICAL NAME 63 0.0% 37 58.7% 62 230.4 485.3
EXACT CHEMICAL 19 0.0% 7 36.8% 98 399.3 632.2
AT 28,228 5.4% 9,228 32.7% 23 582.8 3320.4
AGE 1,911 0.4% 481 25.2% 22 177.9 655.0
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 584 0.1% 169 28.9% 49 1017.0 3824.8
XXS 1,059 0.2% 411 38.8% 21 1780.0 7126.5
XMXS 431 0.1% 170 39.4% 12 863.2 9880.2
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 130 0.0% 93 71.5% 46 2146.1 10520.7
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 102,987 29.0% 34,606 33.6% 8 330.1 3515.7
Single 252,374 71.0% 82,384 32.6% 17 666.6 5837.5
PRESENT commands, by type:
MARC 35.8%
OPAC 28.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS